Squashed 'third_party/immer/' content from commit ad3e3556d

git-subtree-dir: third_party/immer
git-subtree-split: ad3e3556d38bb75966dd24c61a774970a7c7957e

extra/fuzzer/CMakeLists.txt

@@ -0,0 +1,29 @@
+
+add_custom_target(fuzzers
+  COMMENT "Build all fuzzers.")
+
+if (CHECK_FUZZERS)
+  add_dependencies(tests fuzzers)
+endif()
+
+# LIB_FUZZING_ENGINE is set by the Google OSS-Fuzz
+# infrastructure. Otherwise we use Clang's LibFuzzer
+if (DEFINED ENV{LIB_FUZZING_ENGINE})
+  set(immer_fuzzing_engine $ENV{LIB_FUZZING_ENGINE})
+else()
+  set(immer_fuzzing_engine "-fsanitize=fuzzer")
+endif()
+
+file(GLOB_RECURSE immer_fuzzers "*.cpp")
+foreach(_file IN LISTS immer_fuzzers)
+  immer_target_name_for(_target _output "${_file}")
+  add_executable(${_target} EXCLUDE_FROM_ALL "${_file}")
+  set_target_properties(${_target} PROPERTIES OUTPUT_NAME ${_output})
+  target_compile_options(${_target} PUBLIC ${immer_fuzzing_engine})
+  target_link_libraries(${_target} PUBLIC ${immer_fuzzing_engine}
+    immer-dev)
+  add_dependencies(fuzzers ${_target})
+  if (CHECK_FUZZERS)
+    add_test("fuzzer/${_output}" ${_output} -max_total_time=1)
+  endif()
+endforeach()

extra/fuzzer/array-gc.cpp

@@ -0,0 +1,103 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/array.hpp>
+#include <immer/array_transient.hpp>
+#include <immer/heap/gc_heap.hpp>
+#include <immer/refcount/no_refcount_policy.hpp>
+
+#include <array>
+
+using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
+                                       immer::no_refcount_policy,
+                                       immer::gc_transience_policy,
+                                       false>;
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+
+    using array_t     = immer::array<int, gc_memory>;
+    using transient_t = typename array_t::transient_type;
+    using size_t      = std::uint8_t;
+
+    auto vs = std::array<array_t, var_count>{};
+    auto ts = std::array<transient_t, var_count>{};
+
+    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
+    auto is_valid_index = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
+    };
+    auto is_valid_size = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
+    };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_transient,
+            op_persistent,
+            op_push_back,
+            op_update,
+            op_take,
+            op_push_back_mut,
+            op_update_mut,
+            op_take_mut,
+        };
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_transient: {
+            auto src = read<char>(in, is_valid_var);
+            ts[dst]  = vs[src].transient();
+            break;
+        }
+        case op_persistent: {
+            auto src = read<char>(in, is_valid_var);
+            vs[dst]  = ts[src].persistent();
+            break;
+        }
+        case op_push_back: {
+            auto src = read<char>(in, is_valid_var);
+            vs[dst]  = vs[src].push_back(42);
+            break;
+        }
+        case op_update: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_index(vs[src]));
+            vs[dst]  = vs[src].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_size(vs[src]));
+            vs[dst]  = vs[src].take(idx);
+            break;
+        }
+        case op_push_back_mut: {
+            ts[dst].push_back(13);
+            break;
+        }
+        case op_update_mut: {
+            auto idx = read<size_t>(in, is_valid_index(ts[dst]));
+            ts[dst].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take_mut: {
+            auto idx = read<size_t>(in, is_valid_size(ts[dst]));
+            ts[dst].take(idx);
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/array.cpp

@@ -0,0 +1,80 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/array.hpp>
+
+#include <array>
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+
+    using array_t = immer::array<int, immer::default_memory_policy>;
+    using size_t  = std::uint8_t;
+
+    auto vars = std::array<array_t, var_count>{};
+
+    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
+    auto is_valid_index = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
+    };
+    auto is_valid_size = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
+    };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_push_back,
+            op_update,
+            op_take,
+            op_push_back_move,
+            op_update_move,
+            op_take_move,
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_push_back: {
+            vars[dst] = vars[src].push_back(42);
+            break;
+        }
+        case op_update: {
+            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = vars[src].take(idx);
+            break;
+        }
+        case op_push_back_move: {
+            vars[dst] = std::move(vars[src]).push_back(12);
+            break;
+        }
+        case op_update_move: {
+            auto idx = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] =
+                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take_move: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = std::move(vars[src]).take(idx);
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/flex-vector-gc.cpp

@@ -0,0 +1,162 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/flex_vector.hpp>
+#include <immer/flex_vector_transient.hpp>
+#include <immer/heap/gc_heap.hpp>
+#include <immer/refcount/no_refcount_policy.hpp>
+
+#include <array>
+
+using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
+                                       immer::no_refcount_policy,
+                                       immer::gc_transience_policy,
+                                       false>;
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+    constexpr auto bits      = 2;
+
+    using vector_t    = immer::flex_vector<int, gc_memory, bits, bits>;
+    using transient_t = typename vector_t::transient_type;
+    using size_t      = std::uint8_t;
+
+    auto vs = std::array<vector_t, var_count>{};
+    auto ts = std::array<transient_t, var_count>{};
+
+    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
+    auto is_valid_var_neq = [](auto other) {
+        return [=](auto idx) {
+            return idx >= 0 && idx < var_count && idx != other;
+        };
+    };
+    auto is_valid_index = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
+    };
+    auto is_valid_size = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
+    };
+    auto can_concat = [](auto&& v1, auto&& v2) {
+        using size_type = decltype(v1.size());
+        auto max        = std::numeric_limits<size_type>::max() >> (bits * 4);
+        return v1.size() < max && v2.size() < max;
+    };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_transient,
+            op_persistent,
+            op_push_back,
+            op_update,
+            op_take,
+            op_drop,
+            op_concat,
+            op_push_back_mut,
+            op_update_mut,
+            op_take_mut,
+            op_drop_mut,
+            op_prepend_mut,
+            op_prepend_mut_move,
+            op_append_mut,
+            op_append_mut_move,
+        };
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_transient: {
+            auto src = read<char>(in, is_valid_var);
+            ts[dst]  = vs[src].transient();
+            break;
+        }
+        case op_persistent: {
+            auto src = read<char>(in, is_valid_var);
+            vs[dst]  = ts[src].persistent();
+            break;
+        }
+        case op_push_back: {
+            auto src = read<char>(in, is_valid_var);
+            vs[dst]  = vs[src].push_back(42);
+            break;
+        }
+        case op_update: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_index(vs[src]));
+            vs[dst]  = vs[src].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_size(vs[src]));
+            vs[dst]  = vs[src].take(idx);
+            break;
+        }
+        case op_drop: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_size(vs[src]));
+            vs[dst]  = vs[src].drop(idx);
+            break;
+        }
+        case op_concat: {
+            auto src  = read<char>(in, is_valid_var);
+            auto src2 = read<char>(in, is_valid_var);
+            if (can_concat(vs[src], vs[src2]))
+                vs[dst] = vs[src] + vs[src2];
+            break;
+        }
+        case op_push_back_mut: {
+            ts[dst].push_back(13);
+            break;
+        }
+        case op_update_mut: {
+            auto idx = read<size_t>(in, is_valid_index(ts[dst]));
+            ts[dst].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take_mut: {
+            auto idx = read<size_t>(in, is_valid_size(ts[dst]));
+            ts[dst].take(idx);
+            break;
+        }
+        case op_prepend_mut: {
+            auto src = read<char>(in, is_valid_var_neq(dst));
+            if (can_concat(ts[dst], ts[src]))
+                ts[dst].prepend(ts[src]);
+            break;
+        }
+        case op_prepend_mut_move: {
+            auto src = read<char>(in, is_valid_var_neq(dst));
+            if (can_concat(ts[dst], ts[src])) {
+                ts[dst].prepend(std::move(ts[src]));
+                ts[src] = {};
+            }
+            break;
+        }
+        case op_append_mut: {
+            auto src = read<char>(in, is_valid_var_neq(dst));
+            if (can_concat(ts[dst], ts[src]))
+                ts[dst].append(ts[src]);
+            break;
+        }
+        case op_append_mut_move: {
+            auto src = read<char>(in, is_valid_var_neq(dst));
+            if (can_concat(ts[dst], ts[src])) {
+                ts[dst].append(std::move(ts[src]));
+                ts[src] = {};
+            }
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/flex-vector.cpp

@@ -0,0 +1,150 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/box.hpp>
+#include <immer/flex_vector.hpp>
+
+#include <array>
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 8;
+    constexpr auto bits      = 2;
+
+    using vector_t =
+        immer::flex_vector<int, immer::default_memory_policy, bits, bits>;
+    using size_t = std::uint8_t;
+
+    auto vars = std::array<vector_t, var_count>{};
+
+    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
+    auto is_valid_var_neq = [](auto other) {
+        return [=](auto idx) {
+            return idx >= 0 && idx < var_count && idx != other;
+        };
+    };
+    auto is_valid_index = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
+    };
+    auto is_valid_size = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
+    };
+    auto can_concat = [](auto&& v1, auto&& v2) {
+        using size_type = decltype(v1.size());
+        auto max        = std::numeric_limits<size_type>::max() >> (bits * 4);
+        return v1.size() < max && v2.size() < max;
+    };
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_push_back,
+            op_update,
+            op_take,
+            op_drop,
+            op_concat,
+            op_push_back_move,
+            op_update_move,
+            op_take_move,
+            op_drop_move,
+            op_concat_move_l,
+            op_concat_move_r,
+            op_concat_move_lr,
+            op_insert,
+            op_erase,
+            op_compare,
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_push_back: {
+            vars[dst] = vars[src].push_back(42);
+            break;
+        }
+        case op_update: {
+            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = vars[src].take(idx);
+            break;
+        }
+        case op_drop: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = vars[src].drop(idx);
+            break;
+        }
+        case op_concat: {
+            auto src2 = read<char>(in, is_valid_var);
+            if (can_concat(vars[src], vars[src2]))
+                vars[dst] = vars[src] + vars[src2];
+            break;
+        }
+        case op_push_back_move: {
+            vars[dst] = std::move(vars[src]).push_back(21);
+            break;
+        }
+        case op_update_move: {
+            auto idx = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] =
+                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take_move: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = std::move(vars[src]).take(idx);
+            break;
+        }
+        case op_drop_move: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = std::move(vars[src]).drop(idx);
+            break;
+        }
+        case op_concat_move_l: {
+            auto src2 = read<char>(in, is_valid_var_neq(src));
+            if (can_concat(vars[src], vars[src2]))
+                vars[dst] = std::move(vars[src]) + vars[src2];
+            break;
+        }
+        case op_concat_move_r: {
+            auto src2 = read<char>(in, is_valid_var_neq(src));
+            if (can_concat(vars[src], vars[src2]))
+                vars[dst] = vars[src] + std::move(vars[src2]);
+            break;
+        }
+        case op_concat_move_lr: {
+            auto src2 = read<char>(in, is_valid_var_neq(src));
+            if (can_concat(vars[src], vars[src2]))
+                vars[dst] = std::move(vars[src]) + std::move(vars[src2]);
+        }
+        case op_compare: {
+            using std::swap;
+            if (vars[src] == vars[dst])
+                swap(vars[src], vars[dst]);
+            break;
+        }
+        case op_erase: {
+            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] = vars[src].erase(idx);
+            break;
+        }
+        case op_insert: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = vars[src].insert(idx, immer::box<int>{42});
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/fuzzer_input.hpp

@@ -0,0 +1,62 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <cstdint>
+#include <stdexcept>
+
+struct no_more_input : std::exception
+{};
+
+struct fuzzer_input
+{
+    const std::uint8_t* data_;
+    std::size_t size_;
+
+    const std::uint8_t* next(std::size_t size)
+    {
+        if (size_ < size)
+            throw no_more_input{};
+        auto r = data_;
+        data_ += size;
+        size_ -= size;
+        return r;
+    }
+
+    const std::uint8_t* next(std::size_t size, std::size_t align)
+    {
+        auto rem = size % align;
+        if (rem)
+            next(align - rem);
+        return next(size);
+    }
+
+    template <typename Fn>
+    int run(Fn step)
+    {
+        try {
+            while (step(*this))
+                continue;
+        } catch (const no_more_input&) {};
+        return 0;
+    }
+};
+
+template <typename T>
+const T& read(fuzzer_input& fz)
+{
+    return *reinterpret_cast<const T*>(fz.next(sizeof(T), alignof(T)));
+}
+
+template <typename T, typename Cond>
+T read(fuzzer_input& fz, Cond cond)
+{
+    auto x = read<T>(fz);
+    return cond(x) ? x : read<T>(fz, cond);
+}

extra/fuzzer/map-gc.cpp

@@ -0,0 +1,93 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/heap/gc_heap.hpp>
+#include <immer/map.hpp>
+#include <immer/refcount/no_refcount_policy.hpp>
+
+#include <array>
+
+using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
+                                       immer::no_refcount_policy,
+                                       immer::gc_transience_policy,
+                                       false>;
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+
+    using map_t =
+        immer::map<char, int, std::hash<char>, std::equal_to<char>, gc_memory>;
+
+    auto vars = std::array<map_t, var_count>{};
+
+    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_set,
+            op_erase,
+            op_set_move,
+            op_erase_move,
+            op_iterate,
+            op_find,
+            op_update
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_set: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].set(value, 42);
+            break;
+        }
+        case op_erase: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].erase(value);
+            break;
+        }
+        case op_set_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = std::move(vars[src]).set(value, 42);
+            break;
+        }
+        case op_erase_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = std::move(vars[src]).erase(value);
+            break;
+        }
+        case op_iterate: {
+            auto srcv = vars[src];
+            for (const auto& v : srcv) {
+                vars[dst] = vars[dst].set(v.first, v.second);
+            }
+            break;
+        }
+        case op_find: {
+            auto value = read<size_t>(in);
+            auto res   = vars[src].find(value);
+            if (res != nullptr) {
+                vars[dst] = vars[dst].set(*res, 42);
+            }
+            break;
+        }
+        case op_update: {
+            auto key  = read<size_t>(in);
+            vars[dst] = vars[src].update(key, [](int x) { return x + 1; });
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/map.cpp

@@ -0,0 +1,85 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/map.hpp>
+
+#include <array>
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+
+    using map_t = immer::map<char, int>;
+
+    auto vars = std::array<map_t, var_count>{};
+
+    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_set,
+            op_erase,
+            op_set_move,
+            op_erase_move,
+            op_iterate,
+            op_find,
+            op_update
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_set: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].set(value, 42);
+            break;
+        }
+        case op_erase: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].erase(value);
+            break;
+        }
+        case op_set_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = std::move(vars[src]).set(value, 42);
+            break;
+        }
+        case op_erase_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = std::move(vars[src]).erase(value);
+            break;
+        }
+        case op_iterate: {
+            auto srcv = vars[src];
+            for (const auto& v : srcv) {
+                vars[dst] = vars[dst].set(v.first, v.second);
+            }
+            break;
+        }
+        case op_find: {
+            auto value = read<size_t>(in);
+            auto res   = vars[src].find(value);
+            if (res != nullptr) {
+                vars[dst] = vars[dst].set(*res, 42);
+            }
+            break;
+        }
+        case op_update: {
+            auto key  = read<size_t>(in);
+            vars[dst] = vars[src].update(key, [](int x) { return x + 1; });
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/set-gc.cpp

@@ -0,0 +1,78 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/heap/gc_heap.hpp>
+#include <immer/refcount/no_refcount_policy.hpp>
+#include <immer/set.hpp>
+
+#include <array>
+
+using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
+                                       immer::no_refcount_policy,
+                                       immer::gc_transience_policy,
+                                       false>;
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+
+    using set_t =
+        immer::set<int, std::hash<char>, std::equal_to<char>, gc_memory>;
+
+    auto vars = std::array<set_t, var_count>{};
+
+    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_insert,
+            op_erase,
+            op_insert_move,
+            op_erase_move,
+            op_iterate
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_insert: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].insert(value);
+            break;
+        }
+        case op_erase: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].erase(value);
+            break;
+        }
+        case op_insert_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = std::move(vars[src]).insert(value);
+            break;
+        }
+        case op_erase_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].erase(value);
+            break;
+        }
+        case op_iterate: {
+            auto srcv = vars[src];
+            for (const auto& v : srcv) {
+                vars[dst] = vars[dst].insert(v);
+            }
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/set.cpp

@@ -0,0 +1,70 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/set.hpp>
+
+#include <array>
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+
+    using set_t = immer::set<int>;
+
+    auto vars = std::array<set_t, var_count>{};
+
+    auto is_valid_var = [&](auto idx) { return idx >= 0 && idx < var_count; };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_insert,
+            op_erase,
+            op_insert_move,
+            op_erase_move,
+            op_iterate
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_insert: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].insert(value);
+            break;
+        }
+        case op_erase: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].erase(value);
+            break;
+        }
+        case op_insert_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = std::move(vars[src]).insert(value);
+            break;
+        }
+        case op_erase_move: {
+            auto value = read<size_t>(in);
+            vars[dst]  = vars[src].erase(value);
+            break;
+        }
+        case op_iterate: {
+            auto srcv = vars[src];
+            for (const auto& v : srcv) {
+                vars[dst] = vars[dst].insert(v);
+            }
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/vector-gc.cpp

@@ -0,0 +1,104 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/heap/gc_heap.hpp>
+#include <immer/refcount/no_refcount_policy.hpp>
+#include <immer/vector.hpp>
+#include <immer/vector_transient.hpp>
+
+#include <array>
+
+using gc_memory = immer::memory_policy<immer::heap_policy<immer::gc_heap>,
+                                       immer::no_refcount_policy,
+                                       immer::gc_transience_policy,
+                                       false>;
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+    constexpr auto bits      = 2;
+
+    using vector_t    = immer::vector<int, gc_memory, bits, bits>;
+    using transient_t = typename vector_t::transient_type;
+    using size_t      = std::uint8_t;
+
+    auto vs = std::array<vector_t, var_count>{};
+    auto ts = std::array<transient_t, var_count>{};
+
+    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
+    auto is_valid_index = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
+    };
+    auto is_valid_size = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
+    };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_transient,
+            op_persistent,
+            op_push_back,
+            op_update,
+            op_take,
+            op_push_back_mut,
+            op_update_mut,
+            op_take_mut,
+        };
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_transient: {
+            auto src = read<char>(in, is_valid_var);
+            ts[dst]  = vs[src].transient();
+            break;
+        }
+        case op_persistent: {
+            auto src = read<char>(in, is_valid_var);
+            vs[dst]  = ts[src].persistent();
+            break;
+        }
+        case op_push_back: {
+            auto src = read<char>(in, is_valid_var);
+            vs[dst]  = vs[src].push_back(42);
+            break;
+        }
+        case op_update: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_index(vs[src]));
+            vs[dst]  = vs[src].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take: {
+            auto src = read<char>(in, is_valid_var);
+            auto idx = read<size_t>(in, is_valid_size(vs[src]));
+            vs[dst]  = vs[src].take(idx);
+            break;
+        }
+        case op_push_back_mut: {
+            ts[dst].push_back(13);
+            break;
+        }
+        case op_update_mut: {
+            auto idx = read<size_t>(in, is_valid_index(ts[dst]));
+            ts[dst].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take_mut: {
+            auto idx = read<size_t>(in, is_valid_size(ts[dst]));
+            ts[dst].take(idx);
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/fuzzer/vector.cpp

@@ -0,0 +1,82 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include "fuzzer_input.hpp"
+
+#include <immer/vector.hpp>
+
+#include <array>
+
+extern "C" int LLVMFuzzerTestOneInput(const std::uint8_t* data,
+                                      std::size_t size)
+{
+    constexpr auto var_count = 4;
+    constexpr auto bits      = 2;
+
+    using vector_t =
+        immer::vector<int, immer::default_memory_policy, bits, bits>;
+    using size_t = std::uint8_t;
+
+    auto vars = std::array<vector_t, var_count>{};
+
+    auto is_valid_var   = [&](auto idx) { return idx >= 0 && idx < var_count; };
+    auto is_valid_index = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx < v.size(); };
+    };
+    auto is_valid_size = [](auto& v) {
+        return [&](auto idx) { return idx >= 0 && idx <= v.size(); };
+    };
+
+    return fuzzer_input{data, size}.run([&](auto& in) {
+        enum ops
+        {
+            op_push_back,
+            op_update,
+            op_take,
+            op_push_back_move,
+            op_update_move,
+            op_take_move,
+        };
+        auto src = read<char>(in, is_valid_var);
+        auto dst = read<char>(in, is_valid_var);
+        switch (read<char>(in)) {
+        case op_push_back: {
+            vars[dst] = vars[src].push_back(42);
+            break;
+        }
+        case op_update: {
+            auto idx  = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] = vars[src].update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = vars[src].take(idx);
+            break;
+        }
+        case op_push_back_move: {
+            vars[dst] = std::move(vars[src]).push_back(12);
+            break;
+        }
+        case op_update_move: {
+            auto idx = read<size_t>(in, is_valid_index(vars[src]));
+            vars[dst] =
+                std::move(vars[src]).update(idx, [](auto x) { return x + 1; });
+            break;
+        }
+        case op_take_move: {
+            auto idx  = read<size_t>(in, is_valid_size(vars[src]));
+            vars[dst] = std::move(vars[src]).take(idx);
+            break;
+        }
+        default:
+            break;
+        };
+        return true;
+    });
+}

extra/guile/CMakeLists.txt

@@ -0,0 +1,24 @@
+
+find_package(PkgConfig)
+
+pkg_check_modules(Guile guile-2.2)
+
+if (NOT Guile_FOUND)
+  message(STATUS "Disabling Guile modules")
+  return()
+endif()
+
+set(GUILE_EXTENSION_DIR ${CMAKE_CURRENT_BINARY_DIR})
+configure_file(immer.scm.in immer.scm)
+
+add_library(guile-immer SHARED EXCLUDE_FROM_ALL
+  src/immer.cpp)
+target_include_directories(guile-immer PUBLIC
+  ${CMAKE_CURRENT_SOURCE_DIR}
+  ${CALLABLE_TRAITS_INCLUDE_DIR}
+  ${Guile_INCLUDE_DIRS})
+target_link_libraries(guile-immer PUBLIC
+  immer
+  ${Guile_LIBRARIES})
+
+add_custom_target(guile DEPENDS guile-immer)

extra/guile/README.rst

@@ -0,0 +1,144 @@
+
+Guile bindings
+==============
+
+This library includes experimental bindings bring efficient immutable
+vectors for the `GNU Guile`_ Scheme implementation.  The interface is
+somewhat **incomplete**, but you can already do something interesting
+things like:
+
+.. literalinclude:: ../extra/guile/example.scm
+   :language: scheme
+   :start-after: intro/start
+   :end-before:  intro/end
+..
+
+    **Do you want to help** making these bindings complete and production
+    ready?  Drop a line at `immer@sinusoid.al
+    <mailto:immer@sinusoid.al>`_ or `open an issue on Github
+    <https://github.com/arximboldi/immer>`_
+
+.. _GNU Guile: https://www.gnu.org/software/guile/
+
+Installation
+------------
+
+.. highlight:: sh
+
+To install the software, you need `GNU Guile 2.2
+<https://www.gnu.org/software/guile/download/>`_.  Then you have to
+`clone the repository <https://github.com/arximboldi/immer>`_ and
+inside the repository do something like::
+
+    mkdir build; cd build
+    cmake .. -DCMAKE_BUILD_TYPE=Release \
+             -DGUILE_EXTENSION_DIR="<somewhere...>"
+    make guile
+    cp extra/guile/libguile-immer.so "<...the GUILE_EXTENSION_DIR>"
+    cp extra/guile/immer.scm "<somewhere in your GUILE_LOAD_PATH>"
+
+Benchmarks
+----------
+
+The library includes some quick and dirty benchmarks that show how
+these vectors perform compared to *mutable vectors*, *lists*, and
+*v-lists*.  Once you have installed the library, you may run them by
+executing the following in the project root::
+
+    guile extra/guile/benchmark.scm
+
+This is the output I get when running those:
+
+.. code-block:: scheme
+   :name: benchmark-output
+
+   (define bench-size 1000000)
+   (define bench-samples 10)
+   ;;;; benchmarking creation...
+   ; evaluating:
+         (apply ivector (iota bench-size))
+   ; average time: 0.0608697784 seconds
+   ; evaluating:
+         (apply ivector-u32 (iota bench-size))
+   ; average time: 0.0567354933 seconds
+   ; evaluating:
+         (iota bench-size)
+   ; average time: 0.032995402 seconds
+   ; evaluating:
+         (apply vector (iota bench-size))
+   ; average time: 0.0513594425 seconds
+   ; evaluating:
+         (apply u32vector (iota bench-size))
+   ; average time: 0.0939185315 seconds
+   ; evaluating:
+         (list->vlist (iota bench-size))
+   ; average time: 0.2369570977 seconds
+   ;;;; benchmarking iteration...
+   (define bench-ivector (apply ivector (iota bench-size)))
+   (define bench-ivector-u32 (apply ivector-u32 (iota bench-size)))
+   (define bench-list (iota bench-size))
+   (define bench-vector (apply vector (iota bench-size)))
+   (define bench-u32vector (apply u32vector (iota bench-size)))
+   (define bench-vlist (list->vlist (iota bench-size)))
+   ; evaluating:
+         (ivector-fold + 0 bench-ivector)
+   ; average time: 0.035750341 seconds
+   ; evaluating:
+         (ivector-u32-fold + 0 bench-ivector-u32)
+   ; average time: 0.0363843682 seconds
+   ; evaluating:
+         (fold + 0 bench-list)
+   ; average time: 0.0271881423 seconds
+   ; evaluating:
+         (vector-fold + 0 bench-vector)
+   ; average time: 0.0405022349 seconds
+   ; evaluating:
+         (vlist-fold + 0 bench-vlist)
+   ; average time: 0.0424709098 seconds
+   ;;;; benchmarking iteration by index...
+   ; evaluating:
+         (let iter ((i 0) (acc 0))
+           (if (< i (ivector-length bench-ivector))
+             (iter (+ i 1) (+ acc (ivector-ref bench-ivector i)))
+             acc))
+   ; average time: 0.2195658936 seconds
+   ; evaluating:
+         (let iter ((i 0) (acc 0))
+           (if (< i (ivector-u32-length bench-ivector-u32))
+             (iter (+ i 1) (+ acc (ivector-u32-ref bench-ivector-u32 i)))
+             acc))
+   ; average time: 0.2205486326 seconds
+   ; evaluating:
+         (let iter ((i 0) (acc 0))
+           (if (< i (vector-length bench-vector))
+             (iter (+ i 1) (+ acc (vector-ref bench-vector i)))
+             acc))
+   ; average time: 0.0097157637 seconds
+   ; evaluating:
+         (let iter ((i 0) (acc 0))
+           (if (< i (u32vector-length bench-u32vector))
+             (iter (+ i 1) (+ acc (u32vector-ref bench-u32vector i)))
+             acc))
+   ; average time: 0.0733736008 seconds
+   ; evaluating:
+         (let iter ((i 0) (acc 0))
+           (if (< i (vlist-length bench-vlist))
+             (iter (+ i 1) (+ acc (vlist-ref bench-vlist i)))
+             acc))
+   ; average time: 0.3220357243 seconds
+   ;;;; benchmarking concatenation...
+   ; evaluating:
+         (ivector-append bench-ivector bench-ivector)
+   ; average time: 1.63022e-5 seconds
+   ; evaluating:
+         (ivector-u32-append bench-ivector-u32 bench-ivector-u32)
+   ; average time: 1.63754e-5 seconds
+   ; evaluating:
+         (append bench-list bench-list)
+   ; average time: 0.0135592963 seconds
+   ; evaluating:
+         (vector-append bench-vector bench-vector)
+   ; average time: 0.0044506586 seconds
+   ; evaluating:
+         (vlist-append bench-vlist bench-vlist)
+   ; average time: 0.3227312512 seconds

extra/guile/benchmark.scm

@@ -0,0 +1,168 @@
+;;
+;; immer: immutable data structures for C++
+;; Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+;;
+;; This software is distributed under the Boost Software License, Version 1.0.
+;; See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+;;
+
+(use-modules (immer)
+             (fector) ; https://wingolog.org/pub/fector.scm
+             (srfi srfi-1)
+             (srfi srfi-43)
+             (ice-9 vlist)
+             (ice-9 pretty-print)
+             (rnrs bytevectors))
+
+(define-syntax display-eval
+  (syntax-rules ()
+    ((_ expr)
+     (begin (pretty-print 'expr
+                          #:max-expr-width 72)
+            expr))))
+
+(display-eval (define bench-size 1000000))
+(display-eval (define bench-samples 10))
+
+(define (average . ns)
+  (/ (apply + ns) (length ns)))
+
+(define (generate-n n fn)
+  (unfold (lambda (x) (= x n))
+          (lambda (x) (fn))
+          (lambda (x) (+ x 1))
+          0))
+
+(define-syntax benchmark
+  (syntax-rules ()
+    ((_ expr)
+     (begin
+       (display "; evaluating:    ") (newline)
+       (pretty-print 'expr
+                     #:max-expr-width 72
+                     #:per-line-prefix "      ")
+       (let* ((sample (lambda ()
+                        (gc)
+                        (let* ((t0 (get-internal-real-time))
+                               (r  expr)
+                               (t1 (get-internal-real-time)))
+                          (/ (- t1 t0) internal-time-units-per-second))))
+              (samples (generate-n bench-samples sample))
+              (result (apply average samples)))
+         (display "; average time: ")
+         (display (exact->inexact result))
+         (display " seconds")
+         (newline))))))
+
+(display ";;;; benchmarking creation...") (newline)
+
+(display-eval
+ (define (fector . args)
+   (persistent-fector (fold (lambda (v fv) (fector-push! fv v))
+                            (transient-fector)
+                            args))))
+
+(benchmark (apply ivector (iota bench-size)))
+(benchmark (apply ivector-u32 (iota bench-size)))
+(benchmark (iota bench-size))
+(benchmark (apply vector (iota bench-size)))
+(benchmark (apply u32vector (iota bench-size)))
+(benchmark (list->vlist (iota bench-size)))
+(benchmark (apply fector (iota bench-size)))
+
+(display ";;;; benchmarking iteration...") (newline)
+
+(display-eval (define bench-ivector (apply ivector (iota bench-size))))
+(display-eval (define bench-ivector-u32 (apply ivector-u32 (iota bench-size))))
+(display-eval (define bench-list (iota bench-size)))
+(display-eval (define bench-vector (apply vector (iota bench-size))))
+(display-eval (define bench-u32vector (apply u32vector (iota bench-size))))
+(display-eval (define bench-vlist (list->vlist (iota bench-size))))
+(display-eval (define bench-fector (apply fector (iota bench-size))))
+(display-eval (define bench-bytevector-u32
+                (uint-list->bytevector (iota bench-size)
+                                       (native-endianness)
+                                       4)))
+
+(benchmark (ivector-fold + 0 bench-ivector))
+(benchmark (ivector-u32-fold + 0 bench-ivector-u32))
+(benchmark (fold + 0 bench-list))
+(benchmark (vector-fold + 0 bench-vector))
+(benchmark (vlist-fold + 0 bench-vlist))
+(benchmark (fector-fold + bench-fector 0))
+
+(display ";;;; benchmarking iteration by index...") (newline)
+
+(display-eval
+ (define-syntax iteration-by-index
+   (syntax-rules ()
+     ((_ *length *ref *vector *step)
+      (let ((len (*length *vector)))
+        (let iter ((i 0) (acc 0))
+          (if (< i len)
+              (iter (+ i *step)
+                    (+ acc (*ref *vector i)))
+              acc)))))))
+
+(display-eval
+ (define-syntax iteration-by-index-truncate
+   (syntax-rules ()
+     ((_ *length *ref *vector *step)
+      (let ((len (*length *vector)))
+        (let iter ((i 0) (acc 0))
+          (if (< i len)
+              (iter (+ i *step)
+                    (logand #xffffffffFFFFFFFF
+                            (+ acc (*ref *vector i))))
+              acc)))))))
+
+(benchmark (iteration-by-index ivector-length
+                               ivector-ref
+                               bench-ivector 1))
+(benchmark (iteration-by-index ivector-u32-length
+                               ivector-u32-ref
+                               bench-ivector-u32 1))
+(benchmark (iteration-by-index vector-length
+                               vector-ref
+                               bench-vector 1))
+(benchmark (iteration-by-index u32vector-length
+                               u32vector-ref
+                               bench-u32vector 1))
+(benchmark (iteration-by-index vlist-length
+                               vlist-ref
+                               bench-vlist 1))
+(benchmark (iteration-by-index fector-length
+                               fector-ref
+                               bench-fector 1))
+(benchmark (iteration-by-index bytevector-length
+                               bytevector-u32-native-ref
+                               bench-bytevector-u32 4))
+
+(benchmark (iteration-by-index-truncate ivector-length
+                                        ivector-ref
+                                        bench-ivector 1))
+(benchmark (iteration-by-index-truncate ivector-u32-length
+                                        ivector-u32-ref
+                                        bench-ivector-u32 1))
+(benchmark (iteration-by-index-truncate vector-length
+                                        vector-ref
+                                        bench-vector 1))
+(benchmark (iteration-by-index-truncate u32vector-length
+                                        u32vector-ref
+                                        bench-u32vector 1))
+(benchmark (iteration-by-index-truncate vlist-length
+                                        vlist-ref
+                                        bench-vlist 1))
+(benchmark (iteration-by-index-truncate fector-length
+                                        fector-ref
+                                        bench-fector 1))
+(benchmark (iteration-by-index-truncate bytevector-length
+                                        bytevector-u32-native-ref
+                                        bench-bytevector-u32 4))
+
+(display ";;;; benchmarking concatenation...") (newline)
+(benchmark (ivector-append bench-ivector bench-ivector))
+(benchmark (ivector-u32-append bench-ivector-u32 bench-ivector-u32))
+(benchmark (append bench-list bench-list))
+(benchmark (vector-append bench-vector bench-vector))
+(benchmark (vlist-append bench-vlist bench-vlist))

extra/guile/example.scm

@@ -0,0 +1,51 @@
+;;
+;; immer: immutable data structures for C++
+;; Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+;;
+;; This software is distributed under the Boost Software License, Version 1.0.
+;; See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+;;
+
+;; include:intro/start
+(use-modules (immer)
+             (rnrs base))
+
+(let ((v1 (ivector 1 "hola" 3 'que #:tal)))
+  (assert (eq? (ivector-ref v1 3) 'que))
+
+  (let* ((v2 (ivector-set v1 3 'what))
+         (v2 (ivector-update v2 2 (lambda (x) (+ 1 x)))))
+    (assert (eq? (ivector-ref v1 2) 3))
+    (assert (eq? (ivector-ref v1 3) 'que))
+    (assert (eq? (ivector-ref v2 2) 4))
+    (assert (eq? (ivector-ref v2 3) 'what))
+
+    (let ((v3 (ivector-push v2 "hehe")))
+      (assert (eq? (ivector-length v3) 6))
+      (assert (eq? (ivector-ref v3 (- (ivector-length v3) 1)) "hehe")))))
+
+(let ((v (apply ivector (iota 10))))
+  (assert (eq? (ivector-length v) 10))
+  (assert (eq? (ivector-length (ivector-drop v 3)) 7))
+  (assert (eq? (ivector-length (ivector-take v 3)) 3))
+  (assert (eq? (ivector-length (ivector-append v v)) 20)))
+
+(let ((v1 (make-ivector 3))
+      (v2 (make-ivector 3 ":)")))
+  (assert (eq? (ivector-ref v1 2)
+               (vector-ref (make-vector 3) 2)))
+  (assert (eq? (ivector-ref v2 2) ":)")))
+;; include:intro/end
+
+;; Experiments
+
+(let ((d (dummy)))
+  (dummy-foo d)
+  (dummy-bar d 42))
+(gc)
+
+(func1)
+(func2)
+(func3 (dummy) 12)
+(foo-func1)
+(gc)

extra/guile/immer.scm.in

@@ -0,0 +1,5 @@
+(define-module (immer))
+
+;; The extension automatically exports the names via 'scm_c_export'
+(load-extension "@GUILE_EXTENSION_DIR@/libguile-immer"
+                "init_immer")

extra/guile/scm/detail/convert.hpp

@@ -0,0 +1,58 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/util.hpp>
+
+#include <cstdint>
+#include <type_traits>
+#include <utility>
+
+#include <libguile.h>
+
+namespace scm {
+namespace detail {
+
+template <typename T, typename Enable=void>
+struct convert;
+
+template <typename T>
+auto to_scm(T&& v)
+    -> SCM_DECLTYPE_RETURN(
+        convert<std::decay_t<T>>::to_scm(std::forward<T>(v)));
+
+template <typename T>
+auto to_cpp(SCM v)
+    -> SCM_DECLTYPE_RETURN(
+        convert<std::decay_t<T>>::to_cpp(v));
+
+} // namespace detail
+} // namespace scm
+
+#define SCM_DECLARE_NUMERIC_TYPE(cpp_name__, scm_name__)                \
+    namespace scm {                                                     \
+    namespace detail {                                                  \
+    template <>                                                         \
+    struct convert<cpp_name__> {                                        \
+        static cpp_name__ to_cpp(SCM v) { return scm_to_ ## scm_name__(v); } \
+        static SCM to_scm(cpp_name__ v) { return scm_from_ ## scm_name__(v); } \
+    };                                                                  \
+    }} /* namespace scm::detail */                                      \
+    /**/
+
+SCM_DECLARE_NUMERIC_TYPE(float,         double);
+SCM_DECLARE_NUMERIC_TYPE(double,        double);
+SCM_DECLARE_NUMERIC_TYPE(std::int8_t,   int8);
+SCM_DECLARE_NUMERIC_TYPE(std::int16_t,  int16);
+SCM_DECLARE_NUMERIC_TYPE(std::int32_t,  int32);
+SCM_DECLARE_NUMERIC_TYPE(std::int64_t,  int64);
+SCM_DECLARE_NUMERIC_TYPE(std::uint8_t,  uint8);
+SCM_DECLARE_NUMERIC_TYPE(std::uint16_t, uint16);
+SCM_DECLARE_NUMERIC_TYPE(std::uint32_t, uint32);
+SCM_DECLARE_NUMERIC_TYPE(std::uint64_t, uint64);

extra/guile/scm/detail/define.hpp

@@ -0,0 +1,36 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#ifndef SCM_AUTO_EXPORT
+#define SCM_AUTO_EXPORT 1
+#endif
+
+#include <scm/detail/subr_wrapper.hpp>
+#include <scm/list.hpp>
+
+namespace scm {
+namespace detail {
+
+template <typename Tag, typename Fn>
+static void define_impl(const std::string& name, Fn fn)
+{
+    using args_t = function_args_t<Fn>;
+    constexpr auto args_size = pack_size_v<args_t>;
+    constexpr auto has_rest  = std::is_same<pack_last_t<args_t>, scm::args>{};
+    constexpr auto arg_count = args_size - has_rest;
+    auto subr = (scm_t_subr) +subr_wrapper_aux<Tag>(fn, args_t{});
+    scm_c_define_gsubr(name.c_str(), arg_count, 0, has_rest, subr);
+#if SCM_AUTO_EXPORT
+    scm_c_export(name.c_str());
+#endif
+}
+
+} // namespace detail
+} // namespace scm

extra/guile/scm/detail/finalizer_wrapper.hpp

@@ -0,0 +1,62 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/invoke.hpp>
+#include <scm/detail/function_args.hpp>
+#include <scm/detail/convert.hpp>
+
+namespace scm {
+namespace detail {
+// this anonymous namespace should help avoiding registration clashes
+// among translation units.
+namespace {
+
+template <typename Tag, typename Fn>
+auto finalizer_wrapper_impl(Fn fn, pack<>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] { invoke(fn_); };
+}
+template <typename Tag, typename Fn, typename T1>
+auto finalizer_wrapper_impl(Fn fn, pack<T1>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1) { invoke(fn_, to_cpp<T1>(a1)); };
+}
+template <typename Tag, typename Fn, typename T1, typename T2>
+auto finalizer_wrapper_impl(Fn fn, pack<T1, T2>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1, SCM a2) {
+        invoke(fn_, to_cpp<T1>(a1), to_cpp<T2>(a2));
+    };
+}
+template <typename Tag, typename Fn, typename T1, typename T2, typename T3>
+auto finalizer_wrapper_impl(Fn fn, pack<T1, T2, T3>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1, SCM a2, SCM a3) {
+        invoke(fn_, to_cpp<T1>(a1), to_cpp<T2>(a2), to_cpp<T3>(a3));
+    };
+}
+
+template <typename Tag, typename Fn>
+auto finalizer_wrapper(Fn fn)
+{
+    return finalizer_wrapper_impl<Tag>(fn, function_args_t<Fn>{});
+}
+
+} // anonymous namespace
+} // namespace detail
+} // namespace scm

extra/guile/scm/detail/function_args.hpp

@@ -0,0 +1,21 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/pack.hpp>
+#include <boost/callable_traits/args.hpp>
+
+namespace scm {
+namespace detail {
+
+template <typename Fn>
+using function_args_t = boost::callable_traits::args_t<Fn, pack>;
+
+} // namespace detail
+} // namespace scm

extra/guile/scm/detail/invoke.hpp

@@ -0,0 +1,39 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+// Adapted from the official std::invoke proposal:
+// http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n4169.html
+
+#include <type_traits>
+#include <functional>
+
+namespace scm {
+namespace detail {
+
+template <typename Functor, typename... Args>
+std::enable_if_t<
+    std::is_member_pointer<std::decay_t<Functor>>::value,
+    std::result_of_t<Functor&&(Args&&...)>>
+invoke(Functor&& f, Args&&... args)
+{
+    return std::mem_fn(f)(std::forward<Args>(args)...);
+}
+
+template <typename Functor, typename... Args>
+std::enable_if_t<
+    !std::is_member_pointer<std::decay_t<Functor>>::value,
+    std::result_of_t<Functor&&(Args&&...)>>
+invoke(Functor&& f, Args&&... args)
+{
+    return std::forward<Functor>(f)(std::forward<Args>(args)...);
+}
+
+} // namespace detail
+} // namespace scm

extra/guile/scm/detail/pack.hpp

@@ -0,0 +1,52 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+namespace scm {
+namespace detail {
+
+struct none_t;
+
+template <typename... Ts>
+struct pack {};
+
+template <typename Pack>
+struct pack_size;
+
+template <typename... Ts>
+struct pack_size<pack<Ts...>>
+{
+    static constexpr auto value = sizeof...(Ts);
+};
+
+template <typename Pack>
+constexpr auto pack_size_v = pack_size<Pack>::value;
+
+template <typename Pack>
+struct pack_last
+{
+    using type = none_t;
+};
+
+template <typename T, typename ...Ts>
+struct pack_last<pack<T, Ts...>>
+    : pack_last<pack<Ts...>>
+{};
+
+template <typename T>
+struct pack_last<pack<T>>
+{
+    using type = T;
+};
+
+template <typename Pack>
+using pack_last_t = typename pack_last<Pack>::type;
+
+} // namespace detail
+} // namespace scm

extra/guile/scm/detail/subr_wrapper.hpp

@@ -0,0 +1,111 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/invoke.hpp>
+#include <scm/detail/function_args.hpp>
+#include <scm/detail/convert.hpp>
+
+namespace scm {
+namespace detail {
+
+// this anonymous namespace should help avoiding registration clashes
+// among translation units.
+namespace {
+
+template <typename Tag, typename R, typename Fn>
+auto subr_wrapper_impl(Fn fn, pack<R>, pack<>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] () -> SCM { return to_scm(invoke(fn_)); };
+}
+template <typename Tag, typename Fn, typename R, typename T1>
+auto subr_wrapper_impl(Fn fn, pack<R>, pack<T1>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1) -> SCM {
+        return to_scm(invoke(fn_, to_cpp<T1>(a1)));
+    };
+}
+template <typename Tag, typename Fn, typename R, typename T1, typename T2>
+auto subr_wrapper_impl(Fn fn, pack<R>, pack<T1, T2>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1, SCM a2) -> SCM {
+        return to_scm(invoke(fn_, to_cpp<T1>(a1), to_cpp<T2>(a2)));
+    };
+}
+template <typename Tag, typename Fn, typename R, typename T1, typename T2,
+          typename T3>
+auto subr_wrapper_impl(Fn fn, pack<R>, pack<T1, T2, T3>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1, SCM a2, SCM a3) -> SCM {
+        return to_scm(invoke(fn_, to_cpp<T1>(a1), to_cpp<T2>(a2),
+                             to_cpp<T3>(a3)));
+    };
+}
+
+template <typename Tag, typename Fn>
+auto subr_wrapper_impl(Fn fn, pack<void>, pack<>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] () -> SCM { invoke(fn_); return SCM_UNSPECIFIED; };
+}
+template <typename Tag, typename Fn, typename T1>
+auto subr_wrapper_impl(Fn fn, pack<void>, pack<T1>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1) -> SCM {
+        invoke(fn_, to_cpp<T1>(a1)); return SCM_UNSPECIFIED;
+    };
+}
+template <typename Tag, typename Fn, typename T1, typename T2>
+auto subr_wrapper_impl(Fn fn, pack<void>, pack<T1, T2>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1, SCM a2) -> SCM {
+        invoke(fn_, to_cpp<T1>(a1), to_cpp<T2>(a2));
+        return SCM_UNSPECIFIED;
+    };
+}
+template <typename Tag, typename Fn, typename T1, typename T2, typename T3>
+auto subr_wrapper_impl(Fn fn, pack<void>, pack<T1, T2, T3>)
+{
+    check_call_once<Tag, Fn>();
+    static const Fn fn_ = fn;
+    return [] (SCM a1, SCM a2, SCM a3) -> SCM {
+        invoke(fn_, to_cpp<T1>(a1), to_cpp<T2>(a2), to_cpp<T3>(a3));
+        return SCM_UNSPECIFIED;
+    };
+}
+
+template <typename Tag, typename Fn, typename... Args>
+auto subr_wrapper_aux(Fn fn, pack<Args...>)
+{
+    return subr_wrapper_impl<Tag>(
+        fn, pack<std::result_of_t<Fn(Args...)>>{}, pack<Args...>{});
+}
+
+template <typename Tag, typename Fn>
+auto subr_wrapper(Fn fn)
+{
+    return subr_wrapper_aux<Tag>(fn, function_args_t<Fn>{});
+}
+
+} // anonymous namespace
+} // namespace detail
+} // namespace scm

extra/guile/scm/detail/util.hpp

@@ -0,0 +1,49 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <libguile.h>
+
+namespace scm {
+namespace detail {
+
+#define SCM_DECLTYPE_RETURN(...)                \
+    decltype(__VA_ARGS__)                       \
+    { return __VA_ARGS__; }                     \
+    /**/
+
+template <typename... Ts>
+constexpr bool is_valid_v = true;
+
+template <typename... Ts>
+using is_valid_t = void;
+
+template <typename... Ts>
+void check_call_once()
+{
+    static bool called = false;
+    if (called) scm_misc_error (nullptr, "Double defined binding. \
+This may be caused because there are multiple C++ binding groups in the same \
+translation unit.  You may solve this by using different type tags for each \
+binding group.", SCM_EOL);
+    called = true;
+}
+
+struct move_sequence
+{
+    move_sequence() = default;
+    move_sequence(const move_sequence&) = delete;
+    move_sequence(move_sequence&& other)
+    { other.moved_from_ = true; };
+
+    bool moved_from_ = false;
+};
+
+} // namespace detail
+} // namespace scm

extra/guile/scm/group.hpp

@@ -0,0 +1,88 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/define.hpp>
+#include <string>
+
+namespace scm {
+namespace detail {
+
+template <typename Tag, int Seq=0>
+struct definer
+{
+    using this_t = definer;
+    using next_t = definer<Tag, Seq + 1>;
+
+    std::string group_name_ = {};
+
+    definer() = default;
+    definer(definer&&) = default;
+
+    template <int Seq2,
+              typename Enable=std::enable_if_t<Seq2 + 1 == Seq>>
+    definer(definer<Tag, Seq2>)
+    {}
+
+    template <typename Fn>
+    next_t define(std::string name, Fn fn) &&
+    {
+        define_impl<this_t>(name, fn);
+        return { std::move(*this) };
+    }
+
+    template <typename Fn>
+    next_t maker(Fn fn) &&
+    {
+        define_impl<this_t>("make", fn);
+        return { std::move(*this) };
+    }
+};
+
+template <typename Tag, int Seq=0>
+struct group_definer
+{
+    using this_t = group_definer;
+    using next_t = group_definer<Tag, Seq + 1>;
+
+    std::string group_name_ = {};
+
+    group_definer(std::string name)
+        : group_name_{std::move(name)} {}
+
+    group_definer(group_definer&&) = default;
+
+    template <int Seq2,
+              typename Enable=std::enable_if_t<Seq2 + 1 == Seq>>
+    group_definer(group_definer<Tag, Seq2>)
+    {}
+
+    template <typename Fn>
+    next_t define(std::string name, Fn fn) &&
+    {
+        define_impl<this_t>(group_name_ + "-" + name, fn);
+        return { std::move(*this) };
+    }
+};
+
+} // namespace detail
+
+template <typename Tag=void>
+detail::definer<Tag> group()
+{
+    return {};
+}
+
+template <typename Tag=void>
+detail::group_definer<Tag> group(std::string name)
+{
+    return { std::move(name) };
+}
+
+} // namespace scm

extra/guile/scm/list.hpp

@@ -0,0 +1,54 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/val.hpp>
+#include <iostream>
+
+namespace scm {
+
+struct list : detail::wrapper
+{
+    using base_t = detail::wrapper;
+    using base_t::base_t;
+
+    using iterator = list;
+    using value_type = val;
+
+    list() : base_t{SCM_EOL} {};
+    list end() const { return {}; }
+    list begin() const { return *this; }
+
+    explicit operator bool() { return handle_ != SCM_EOL; }
+
+    val operator* () const { return val{scm_car(handle_)}; }
+
+    list& operator++ ()
+    {
+        handle_ = scm_cdr(handle_);
+        return *this;
+    }
+
+    list operator++ (int)
+    {
+        auto result = *this;
+        result.handle_ = scm_cdr(handle_);
+        return result;
+    }
+};
+
+struct args : list
+{
+    using list::list;
+};
+
+} // namespace scm
+
+SCM_DECLARE_WRAPPER_TYPE(scm::list);
+SCM_DECLARE_WRAPPER_TYPE(scm::args);

extra/guile/scm/scm.hpp

@@ -0,0 +1,14 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/val.hpp>
+#include <scm/list.hpp>
+#include <scm/group.hpp>
+#include <scm/type.hpp>

extra/guile/scm/type.hpp

@@ -0,0 +1,153 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/finalizer_wrapper.hpp>
+#include <scm/detail/define.hpp>
+#include <string>
+
+namespace scm {
+namespace detail {
+
+template <typename T>
+struct foreign_type_storage
+{
+    static SCM data;
+};
+
+template <typename T>
+SCM foreign_type_storage<T>::data = SCM_UNSPECIFIED;
+
+template <typename T>
+struct convert_foreign_type
+{
+    using storage_t = foreign_type_storage<T>;
+    static T& to_cpp(SCM v)
+    {
+        assert(storage_t::data != SCM_UNSPECIFIED &&
+               "can not convert to undefined type");
+        scm_assert_foreign_object_type(storage_t::data, v);
+        return *(T*)scm_foreign_object_ref(v, 0);
+    }
+
+    template <typename U>
+    static SCM to_scm(U&& v)
+    {
+        assert(storage_t::data != SCM_UNSPECIFIED &&
+               "can not convert from undefined type");
+        return scm_make_foreign_object_1(
+            storage_t::data,
+            new (scm_gc_malloc(sizeof(T), "scmpp")) T(
+                std::forward<U>(v)));
+    }
+};
+
+// Assume that every other type is foreign
+template <typename T>
+struct convert<T,
+               std::enable_if_t<!std::is_fundamental<T>::value &&
+                                // only value types are supported at
+                                // the moment but the story might
+                                // change later...
+                                !std::is_pointer<T>::value>>
+    : convert_foreign_type<T>
+{
+};
+
+template <typename Tag, typename T, int Seq=0>
+struct type_definer : move_sequence
+{
+    using this_t = type_definer;
+    using next_t = type_definer<Tag, T, Seq + 1>;
+
+    std::string type_name_ = {};
+    scm_t_struct_finalize finalizer_ = nullptr;
+
+    type_definer(type_definer&&) = default;
+
+    type_definer(std::string type_name)
+        : type_name_(std::move(type_name))
+    {}
+
+    ~type_definer()
+    {
+        if (!moved_from_) {
+            using storage_t = detail::foreign_type_storage<T>;
+            assert(storage_t::data == SCM_UNSPECIFIED);
+            storage_t::data = scm_make_foreign_object_type(
+                scm_from_utf8_symbol(("<" + type_name_ + ">").c_str()),
+                scm_list_1(scm_from_utf8_symbol("data")),
+                finalizer_);
+        }
+    }
+
+    template <int Seq2, typename Enable=std::enable_if_t<Seq2 + 1 == Seq>>
+    type_definer(type_definer<Tag, T, Seq2> r)
+        : move_sequence{std::move(r)}
+        , type_name_{std::move(r.type_name_)}
+        , finalizer_{std::move(r.finalizer_)}
+    {}
+
+    next_t constructor() &&
+    {
+        define_impl<this_t>(type_name_, [] { return T{}; });
+        return { std::move(*this) };
+    }
+
+    template <typename Fn>
+    next_t constructor(Fn fn) &&
+    {
+        define_impl<this_t>(type_name_, fn);
+        return { std::move(*this) };
+    }
+
+    next_t finalizer() &&
+    {
+        finalizer_ = (scm_t_struct_finalize) +finalizer_wrapper<Tag>(
+            [] (T& x) { x.~T(); });
+        return { std::move(*this) };
+    }
+
+    template <typename Fn>
+    next_t finalizer(Fn fn) &&
+    {
+        finalizer_ = (scm_t_struct_finalize) +finalizer_wrapper<Tag>(fn);
+        return { std::move(*this) };
+    }
+
+    next_t maker() &&
+    {
+        define_impl<this_t>("make-" + type_name_, [] { return T{}; });
+        return { std::move(*this) };
+    }
+
+    template <typename Fn>
+    next_t maker(Fn fn) &&
+    {
+        define_impl<this_t>("make-" + type_name_, fn);
+        return { std::move(*this) };
+    }
+
+    template <typename Fn>
+    next_t define(std::string name, Fn fn) &&
+    {
+        define_impl<this_t>(type_name_ + "-" + name, fn);
+        return { std::move(*this) };
+    }
+};
+
+} // namespace detail
+
+template <typename Tag, typename T=Tag>
+detail::type_definer<Tag, T> type(std::string type_name)
+{
+    return { type_name };
+}
+
+} // namespace scm

extra/guile/scm/val.hpp

@@ -0,0 +1,88 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#pragma once
+
+#include <scm/detail/convert.hpp>
+
+namespace scm {
+namespace detail {
+
+template <typename T>
+struct convert_wrapper_type
+{
+    static T to_cpp(SCM v) { return T{v}; }
+    static SCM to_scm(T v) { return v.get(); }
+};
+
+struct wrapper
+{
+    wrapper() = default;
+    wrapper(SCM hdl) : handle_{hdl} {}
+    SCM get() const { return handle_; }
+    operator SCM () const { return handle_; }
+
+    bool operator==(wrapper other) { return handle_ == other.handle_; }
+    bool operator!=(wrapper other) { return handle_ != other.handle_; }
+
+protected:
+    SCM handle_ = SCM_UNSPECIFIED;
+};
+
+} // namespace detail
+
+struct val : detail::wrapper
+{
+    using base_t = detail::wrapper;
+    using base_t::base_t;
+
+    template <typename T,
+              typename = std::enable_if_t<
+                  (!std::is_same<std::decay_t<T>, val>{} &&
+                   !std::is_same<std::decay_t<T>, SCM>{})>>
+    val(T&& x)
+        : base_t(detail::to_scm(std::forward<T>(x)))
+    {}
+
+    template <typename T,
+              typename = std::enable_if_t<
+                  std::is_same<T, decltype(detail::to_cpp<T>(SCM{}))>{}>>
+    operator T() const { return detail::to_cpp<T>(handle_); }
+
+    template <typename T,
+              typename = std::enable_if_t<
+                  std::is_same<T&, decltype(detail::to_cpp<T>(SCM{}))>{}>>
+    operator T& () const { return detail::to_cpp<T>(handle_); }
+
+    template <typename T,
+              typename = std::enable_if_t<
+                  std::is_same<const T&, decltype(detail::to_cpp<T>(SCM{}))>{}>>
+    operator const T& () const { return detail::to_cpp<T>(handle_); }
+
+    val operator() () const
+    { return val{scm_call_0(get())}; }
+    val operator() (val a0) const
+    { return val{scm_call_1(get(), a0)}; }
+    val operator() (val a0, val a1) const
+    { return val{scm_call_2(get(), a0, a1)}; }
+    val operator() (val a0, val a1, val a3) const
+    { return val{scm_call_3(get(), a0, a1, a3)}; }
+};
+
+} // namespace scm
+
+#define SCM_DECLARE_WRAPPER_TYPE(cpp_name__)                            \
+    namespace scm {                                                     \
+    namespace detail {                                                  \
+    template <>                                                         \
+    struct convert<cpp_name__>                                          \
+        : convert_wrapper_type<cpp_name__> {};                          \
+    }} /* namespace scm::detail */                                      \
+    /**/
+
+SCM_DECLARE_WRAPPER_TYPE(val);

extra/guile/src/immer.cpp

@@ -0,0 +1,153 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include <immer/flex_vector.hpp>
+#include <immer/flex_vector_transient.hpp>
+#include <immer/algorithm.hpp>
+#include <scm/scm.hpp>
+#include <iostream>
+
+namespace {
+
+struct guile_heap
+{
+    static void* allocate(std::size_t size)
+    { return scm_gc_malloc(size, "immer"); }
+
+    static void* allocate(std::size_t size, immer::norefs_tag)
+    { return scm_gc_malloc_pointerless(size, "immer"); }
+
+    template <typename ...Tags>
+    static void deallocate(std::size_t size, void* obj, Tags...)
+    { scm_gc_free(obj, size, "immer"); }
+};
+
+using guile_memory = immer::memory_policy<
+    immer::heap_policy<guile_heap>,
+    immer::no_refcount_policy,
+    immer::gc_transience_policy,
+    false>;
+
+template <typename T>
+using guile_ivector = immer::flex_vector<T, guile_memory>;
+
+struct dummy
+{
+    SCM port_ = scm_current_warning_port();
+
+    dummy(dummy&&)
+    { scm_puts("~~ dummy move constructor\n", port_); }
+
+    dummy()
+    { scm_puts("~~ dummy default constructor\n", port_); }
+
+    ~dummy()
+    { scm_puts("~~ dummy finalized\n", port_); }
+
+    void foo()
+    { scm_puts("~~ dummy foo\n", port_); }
+
+    int bar(int x)
+    {
+        auto res = x + 42;
+        scm_puts("~~ dummy bar: ", port_);
+        scm_display(scm::val{res}, port_);
+        scm_newline(port_);
+        return res;
+    }
+};
+
+template <int I>
+void func()
+{
+    auto port = scm_current_warning_port();
+    scm_puts("~~ func", port);
+    scm_display(scm_from_int(I), port);
+    scm_newline(port);
+}
+
+template <typename T = scm::val>
+void init_ivector(std::string type_name = "")
+{
+    using namespace std::string_literals;
+
+    using self_t = guile_ivector<T>;
+    using size_t = typename self_t::size_type;
+
+    auto name = "ivector"s + (type_name.empty() ? ""s : "-" + type_name);
+
+    scm::type<self_t>(name)
+        .constructor([] (scm::args rest) {
+            return self_t(rest.begin(), rest.end());
+        })
+        .maker([] (size_t n, scm::args rest) {
+            return self_t(n, rest ? *rest : scm::val{});
+        })
+        .define("ref", &self_t::operator[])
+        .define("length", &self_t::size)
+        .define("set", [] (const self_t& v, size_t i, scm::val x) {
+            return v.set(i, x);
+        })
+        .define("update", [] (const self_t& v, size_t i, scm::val fn) {
+            return v.update(i, fn);
+        })
+        .define("push", [] (const self_t& v, scm::val x) {
+            return v.push_back(x);
+        })
+        .define("take", [] (const self_t& v, size_t s) {
+            return v.take(s);
+        })
+        .define("drop", [] (const self_t& v, size_t s) {
+            return v.drop(s);
+        })
+        .define("append", [] (self_t v, scm::args rest) {
+            for (auto x : rest)
+                v = v + x;
+            return v;
+        })
+        .define("fold", [] (scm::val fn, scm::val first, const self_t& v) {
+            return immer::accumulate(v, first, fn);
+        })
+        ;
+}
+
+} // anonymous namespace
+
+struct bar_tag_t {};
+
+extern "C"
+void init_immer()
+{
+    scm::type<dummy>("dummy")
+        .constructor()
+        .finalizer()
+        .define("foo", &dummy::foo)
+        .define("bar", &dummy::bar);
+
+    scm::group()
+        .define("func1", func<1>);
+
+    scm::group<bar_tag_t>()
+        .define("func2", func<2>)
+        .define("func3", &dummy::bar);
+
+    scm::group("foo")
+        .define("func1", func<1>);
+
+    init_ivector();
+    init_ivector<std::uint8_t>("u8");
+    init_ivector<std::uint16_t>("u16");
+    init_ivector<std::uint32_t>("u32");
+    init_ivector<std::uint64_t>("u64");
+    init_ivector<std::int8_t>("s8");
+    init_ivector<std::int16_t>("s16");
+    init_ivector<std::int32_t>("s32");
+    init_ivector<std::int64_t>("s64");
+    init_ivector<float>("f32");
+    init_ivector<double>("f64");
+}

extra/js/immer.cpp

@@ -0,0 +1,79 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include <immer/vector.hpp>
+#include <immer/refcount/unsafe_refcount_policy.hpp>
+#include <emscripten/bind.h>
+
+namespace {
+
+using memory_t = immer::memory_policy<
+    immer::unsafe_free_list_heap_policy<immer::malloc_heap>,
+    immer::unsafe_refcount_policy>;
+
+template <typename T>
+using js_vector_t = immer::vector<T, memory_t>;
+
+template <typename VectorT>
+VectorT range(typename VectorT::value_type first,
+              typename VectorT::value_type last)
+{
+    auto v = VectorT{};
+    for (; first != last; ++first)
+        v = std::move(v).push_back(first);
+    return v;
+}
+
+template <typename VectorT>
+VectorT range_slow(typename VectorT::value_type first,
+                   typename VectorT::value_type last)
+{
+    auto v = VectorT{};
+    for (; first != last; ++first)
+        v = v.push_back(first);
+    return v;
+}
+
+template <typename VectorT>
+VectorT push_back(VectorT& v, typename VectorT::value_type x)
+{ return v.push_back(x); }
+
+template <typename VectorT>
+VectorT set(VectorT& v, std::size_t i, typename VectorT::value_type x)
+{ return v.set(i, x); }
+
+template <typename T>
+void bind_vector(const char* name)
+{
+    using emscripten::class_;
+
+    using vector_t = js_vector_t<T>;
+
+    class_<vector_t>(name)
+        .constructor()
+        .function("push",  &push_back<vector_t>)
+        .function("set",   &set<vector_t>)
+        .function("get",   &vector_t::operator[])
+        .property("size",  &vector_t::size);
+}
+
+} // anonymous namespace
+
+EMSCRIPTEN_BINDINGS(immer)
+{
+    using emscripten::function;
+
+    bind_vector<emscripten::val>("Vector");
+    bind_vector<int>("VectorInt");
+    bind_vector<double>("VectorNumber");
+
+    function("range_int", &range<js_vector_t<int>>);
+    function("rangeSlow_int", &range_slow<js_vector_t<int>>);
+    function("range_double", &range<js_vector_t<double>>);
+    function("rangeSlow_double", &range_slow<js_vector_t<double>>);
+}

extra/js/index.js

@@ -0,0 +1,74 @@
+/*
+ * immer: immutable data structures for C++
+ * Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+ *
+ * This software is distributed under the Boost Software License, Version 1.0.
+ * See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+ */
+
+var immer = Module
+
+var N = 1000
+
+var suite = new Benchmark.Suite('push')
+    .add('Immutable.List', function(){
+        var v = new Immutable.List
+        for (var x = 0; x < N; ++x)
+            v = v.push(x)
+    })
+    .add('mori.vector', function(){
+        var v = mori.vector()
+        for (var x = 0; x < N; ++x)
+            v = mori.conj.f2(v, x)
+    })
+    .add('mori.vector-Transient', function(){
+        var v = mori.mutable.thaw(mori.vector())
+        for (var x = 0; x < N; ++x)
+            v = mori.mutable.conj.f2(v, x)
+        return mori.mutable.freeze(v)
+    })
+    .add('immer.Vector', function(){
+        var v = new immer.Vector
+        for (var x = 0; x < N; ++x) {
+            var v_ = v
+            v = v.push(x)
+            v_.delete()
+        }
+    })
+    .add('immer.VectorInt', function(){
+        var v = new immer.VectorInt
+        for (var x = 0; x < N; ++x) {
+            var v_ = v
+            v = v.push(x)
+            v_.delete()
+        }
+        v.delete()
+    })
+    .add('immer.VectorNumber', function(){
+        var v = new immer.VectorNumber
+        for (var x = 0; x < N; ++x) {
+            var v_ = v
+            v = v.push(x)
+            v_.delete()
+        }
+        v.delete()
+    })
+    .add('immer.VectorInt-Native', function(){
+        immer.rangeSlow_int(0, N).delete()
+    })
+    .add('immer.VectorInt-NativeTransient', function(){
+        immer.range_int(0, N).delete()
+    })
+    .add('immer.VectorDouble-Native', function(){
+        immer.rangeSlow_double(0, N).delete()
+    })
+    .add('immer.VectorDouble-NativeTransient', function(){
+        immer.range_double(0, N).delete()
+    })
+    .on('cycle', function(event) {
+        console.log(String(event.target));
+    })
+    .on('complete', function() {
+        console.log('Fastest is ' + this.filter('fastest').map('name'));
+    })
+    .run({ 'async': true })

extra/js/index.tpl.html

@@ -0,0 +1,77 @@
+<!--
+    immer: immutable data structures for C++
+    Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+
+    This software is distributed under the Boost Software License, Version 1.0.
+    See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+-->
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <script src="../lib/lodash.js"></script>
+    <script src="../lib/platform.js"></script>
+    <script src="../lib/benchmark.js"></script>
+    <script src="../lib/immutable.min.js"></script>
+    <script src="../lib/mori.js"></script>
+    <script>
+    </script>
+  </head>
+  <body>
+    <script>
+     var IMMER_WASM_HAS_MEM = false;
+     var IMMER_JS_FILE = '%IMMER_JS%'
+     var Module = {};
+
+     if (IMMER_JS_FILE.endsWith('wasm.js'))
+         loadWasm()
+     else if (IMMER_JS_FILE.endsWith('asmjs.js'))
+         loadAsmjs()
+     else
+         throw Error('Wrong format')
+
+     function loadAsync(u, c) {
+         var d = document, t = 'script',
+             o = d.createElement(t),
+             s = d.getElementsByTagName(t)[0];
+         o.src = u;
+         if (c) { o.addEventListener('load', function (e) { c(null, e); }, false); }
+         s.parentNode.insertBefore(o, s);
+     }
+
+     function loadAsmjs() {
+         loadAsync(IMMER_JS_FILE, function () {
+             loadAsync('../index.js')
+         });
+     }
+
+     function loadWasm() {
+         var xhr = new XMLHttpRequest();
+         var basename = IMMER_JS_FILE.substring(0, IMMER_JS_FILE.length-3)
+         xhr.open('GET', basename + '.wasm', true);
+         xhr.responseType = 'arraybuffer';
+         xhr.onload = function() {
+             Module.wasmBinary = xhr.response;
+             if (IMMER_WASM_HAS_MEM) {
+                 (function() {
+                     var memoryInitializer = IMMER_JS_FILE + '.mem';
+                     if (typeof Module['locateFile'] === 'function') {
+                         memoryInitializer = Module['locateFile'](memoryInitializer);
+                     } else if (Module['memoryInitializerPrefixURL']) {
+                         memoryInitializer = Module['memoryInitializerPrefixURL'] + memoryInitializer;
+                     }
+                     var xhr = Module['memoryInitializerRequest'] = new XMLHttpRequest();
+                     xhr.open('GET', memoryInitializer, true);
+                     xhr.responseType = 'arraybuffer';
+                     xhr.send(null);
+                 })();
+             }
+             loadAsync(IMMER_JS_FILE, function () {
+                 loadAsync('../index.js')
+             });
+         };
+         xhr.send(null);
+     }
+    </script>
+  </body>
+</html>

extra/js/lib/immutable.min.js

@@ -0,0 +1,36 @@
+/**
+ *  Copyright (c) 2014-2015, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ */
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+var n=this;return r(this._defaultValues).map(function(t,e){return n.get(e)}).__iterate(t,e)},Ae.prototype.__ensureOwner=function(t){if(t===this.__ownerID)return this;var e=this._map&&this._map.__ensureOwner(t);return t?je(this,e,t):(this.__ownerID=t,this._map=e,this)};var Gr=Ae.prototype;Gr[_r]=Gr.remove,Gr.deleteIn=Gr.removeIn=Cr.removeIn,Gr.merge=Cr.merge,Gr.mergeWith=Cr.mergeWith,Gr.mergeIn=Cr.mergeIn,Gr.mergeDeep=Cr.mergeDeep,Gr.mergeDeepWith=Cr.mergeDeepWith,Gr.mergeDeepIn=Cr.mergeDeepIn,Gr.setIn=Cr.setIn,Gr.update=Cr.update,Gr.updateIn=Cr.updateIn,Gr.withMutations=Cr.withMutations,Gr.asMutable=Cr.asMutable,Gr.asImmutable=Cr.asImmutable,t(Le,nt),Le.of=function(){return this(arguments)},Le.fromKeys=function(t){return this(r(t).keySeq())},Le.prototype.toString=function(){return this.__toString("Set {","}")},Le.prototype.has=function(t){return this._map.has(t)},Le.prototype.add=function(t){return Be(this,this._map.set(t,!0))},Le.prototype.remove=function(t){return Be(this,this._map.remove(t))},Le.prototype.clear=function(){return Be(this,this._map.clear())},Le.prototype.union=function(){var t=sr.call(arguments,0);return t=t.filter(function(t){return 0!==t.size}),0===t.length?this:0!==this.size||this.__ownerID||1!==t.length?this.withMutations(function(e){for(var r=0;t.length>r;r++)i(t[r]).forEach(function(t){return e.add(t)})}):this.constructor(t[0])},Le.prototype.intersect=function(){var t=sr.call(arguments,0);if(0===t.length)return this;t=t.map(function(t){return i(t)});var e=this;return this.withMutations(function(r){e.forEach(function(e){t.every(function(t){return t.includes(e)})||r.remove(e)})})},Le.prototype.subtract=function(){var t=sr.call(arguments,0);if(0===t.length)return this;t=t.map(function(t){return i(t)});var e=this;return this.withMutations(function(r){e.forEach(function(e){t.some(function(t){return t.includes(e)})&&r.remove(e)})})},Le.prototype.merge=function(){return this.union.apply(this,arguments)},Le.prototype.mergeWith=function(t){var e=sr.call(arguments,1);return this.union.apply(this,e)},
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extra/js/lib/mori.js

@@ -0,0 +1,435 @@
+/*
+ * immer: immutable data structures for C++
+ * Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+ *
+ * This software is distributed under the Boost Software License, Version 1.0.
+ * See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+ */
+
+(function(definition){if(typeof exports==="object"){module.exports=definition();}else if(typeof define==="function"&&define.amd){define(definition);}else{mori=definition();}})(function(){return function(){
+if(typeof Math.imul == "undefined" || (Math.imul(0xffffffff,5) == 0)) {
+    Math.imul = function (a, b) {
+        var ah  = (a >>> 16) & 0xffff;
+        var al = a & 0xffff;
+        var bh  = (b >>> 16) & 0xffff;
+        var bl = b & 0xffff;
+        // the shift by 0 fixes the sign on the high part
+        // the final |0 converts the unsigned value into a signed value
+        return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0)|0);
+    }
+}
+
+var k,aa=this;
+function n(a){var b=typeof a;if("object"==b)if(a){if(a instanceof Array)return"array";if(a instanceof Object)return b;var c=Object.prototype.toString.call(a);if("[object Window]"==c)return"object";if("[object Array]"==c||"number"==typeof a.length&&"undefined"!=typeof a.splice&&"undefined"!=typeof a.propertyIsEnumerable&&!a.propertyIsEnumerable("splice"))return"array";if("[object Function]"==c||"undefined"!=typeof a.call&&"undefined"!=typeof a.propertyIsEnumerable&&!a.propertyIsEnumerable("call"))return"function"}else return"null";else if("function"==
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+r("mori.disj",Xc);r("mori.disj.f1",Xc.b);r("mori.disj.f2",Xc.a);r("mori.disj.fn",Xc.K);r("mori.pop",function(a){return null==a?null:mb(a)});r("mori.peek",Wc);r("mori.hash",nc);r("mori.get",S);r("mori.get.f2",S.a);r("mori.get.f3",S.c);r("mori.hasKey",nd);r("mori.isEmpty",Yc);r("mori.reverse",Jd);r("mori.take",Pe);r("mori.take.f1",Pe.b);r("mori.take.f2",Pe.a);r("mori.drop",Qe);r("mori.drop.f1",Qe.b);r("mori.drop.f2",Qe.a);r("mori.takeNth",rh);r("mori.takeNth.f1",rh.b);r("mori.takeNth.f2",rh.a);
+r("mori.partition",bf);r("mori.partition.f2",bf.a);r("mori.partition.f3",bf.c);r("mori.partition.f4",bf.n);r("mori.partitionAll",kh);r("mori.partitionAll.f1",kh.b);r("mori.partitionAll.f2",kh.a);r("mori.partitionAll.f3",kh.c);r("mori.partitionBy",th);r("mori.partitionBy.f1",th.b);r("mori.partitionBy.f2",th.a);r("mori.iterate",function Zh(b,c){return M(c,new V(null,function(){return Zh(b,b.b?b.b(c):b.call(null,c))},null,null))});r("mori.into",af);r("mori.into.f2",af.a);r("mori.into.f3",af.c);
+r("mori.merge",Wg);r("mori.mergeWith",Xg);r("mori.subvec",Cf);r("mori.subvec.f2",Cf.a);r("mori.subvec.f3",Cf.c);r("mori.takeWhile",lh);r("mori.takeWhile.f1",lh.b);r("mori.takeWhile.f2",lh.a);r("mori.dropWhile",Re);r("mori.dropWhile.f1",Re.b);r("mori.dropWhile.f2",Re.a);r("mori.groupBy",function(a,b){return ce(A.c(function(b,d){var e=a.b?a.b(d):a.call(null,d);return ee.c(b,e,Nc.a(S.c(b,e,Mc),d))},Ob(Uf),b))});r("mori.interpose",function(a,b){return Qe.a(1,Ue.a(Se.b(a),b))});r("mori.interleave",Ue);
+r("mori.interleave.f2",Ue.a);r("mori.interleave.fn",Ue.K);r("mori.concat",ae);r("mori.concat.f0",ae.l);r("mori.concat.f1",ae.b);r("mori.concat.f2",ae.a);r("mori.concat.fn",ae.K);function $e(a){return a instanceof Array||cd(a)}r("mori.flatten",function(a){return Xe.a(function(a){return!$e(a)},H(Ze(a)))});r("mori.lazySeq",function(a){return new V(null,a,null,null)});r("mori.keys",Tg);r("mori.selectKeys",Yg);r("mori.vals",Vg);r("mori.primSeq",Jc);r("mori.primSeq.f1",Jc.b);r("mori.primSeq.f2",Jc.a);
+r("mori.map",Oe);r("mori.map.f1",Oe.b);r("mori.map.f2",Oe.a);r("mori.map.f3",Oe.c);r("mori.map.f4",Oe.n);r("mori.map.fn",Oe.K);
+r("mori.mapIndexed",function(a,b){return function d(b,f){return new V(null,function(){var g=D(f);if(g){if(fd(g)){for(var h=Yb(g),l=Q(h),m=Td(l),p=0;;)if(p<l)Xd(m,function(){var d=b+p,f=C.a(h,p);return a.a?a.a(d,f):a.call(null,d,f)}()),p+=1;else break;return Wd(m.ca(),d(b+l,Zb(g)))}return M(function(){var d=G(g);return a.a?a.a(b,d):a.call(null,b,d)}(),d(b+1,H(g)))}return null},null,null)}(0,b)});r("mori.mapcat",We);r("mori.mapcat.f1",We.b);r("mori.mapcat.fn",We.K);r("mori.reduce",A);
+r("mori.reduce.f2",A.a);r("mori.reduce.f3",A.c);r("mori.reduceKV",function(a,b,c){return null!=c?xb(c,a,b):b});r("mori.keep",Le);r("mori.keep.f1",Le.b);r("mori.keep.f2",Le.a);r("mori.keepIndexed",Ne);r("mori.keepIndexed.f1",Ne.b);r("mori.keepIndexed.f2",Ne.a);r("mori.filter",Xe);r("mori.filter.f1",Xe.b);r("mori.filter.f2",Xe.a);r("mori.remove",Ye);r("mori.remove.f1",Ye.b);r("mori.remove.f2",Ye.a);r("mori.some",Fe);r("mori.every",Ee);r("mori.equals",sc);r("mori.equals.f1",sc.b);
+r("mori.equals.f2",sc.a);r("mori.equals.fn",sc.K);r("mori.range",qh);r("mori.range.f0",qh.l);r("mori.range.f1",qh.b);r("mori.range.f2",qh.a);r("mori.range.f3",qh.c);r("mori.repeat",Se);r("mori.repeat.f1",Se.b);r("mori.repeat.f2",Se.a);r("mori.repeatedly",Te);r("mori.repeatedly.f1",Te.b);r("mori.repeatedly.f2",Te.a);r("mori.sort",sd);r("mori.sort.f1",sd.b);r("mori.sort.f2",sd.a);r("mori.sortBy",td);r("mori.sortBy.f2",td.a);r("mori.sortBy.f3",td.c);r("mori.intoArray",Ia);r("mori.intoArray.f1",Ia.b);
+r("mori.intoArray.f2",Ia.a);r("mori.subseq",nh);r("mori.subseq.f3",nh.c);r("mori.subseq.f5",nh.r);r("mori.dedupe",Fh);r("mori.dedupe.f0",Fh.l);r("mori.dedupe.f1",Fh.b);r("mori.transduce",wd);r("mori.transduce.f3",wd.c);r("mori.transduce.f4",wd.n);r("mori.eduction",function(a,b){return new Gh(a,b)});r("mori.sequence",Ce);r("mori.sequence.f1",Ce.b);r("mori.sequence.f2",Ce.a);r("mori.sequence.fn",Ce.K);r("mori.completing",vd);r("mori.completing.f1",vd.b);r("mori.completing.f2",vd.a);r("mori.list",Kd);
+r("mori.vector",Af);r("mori.hashMap",Pg);r("mori.set",fh);r("mori.sortedSet",gh);r("mori.sortedSetBy",hh);r("mori.sortedMap",Qg);r("mori.sortedMapBy",Rg);r("mori.queue",function(){function a(a){var d=null;if(0<arguments.length){for(var d=0,e=Array(arguments.length-0);d<e.length;)e[d]=arguments[d+0],++d;d=new F(e,0)}return b.call(this,d)}function b(a){return af.a?af.a(Mf,a):af.call(null,Mf,a)}a.i=0;a.f=function(a){a=D(a);return b(a)};a.d=b;return a}());r("mori.keyword",Pd);r("mori.keyword.f1",Pd.b);
+r("mori.keyword.f2",Pd.a);r("mori.symbol",rc);r("mori.symbol.f1",rc.b);r("mori.symbol.f2",rc.a);r("mori.zipmap",function(a,b){for(var c=Ob(Uf),d=D(a),e=D(b);;)if(d&&e)c=ee.c(c,G(d),G(e)),d=K(d),e=K(e);else return Qb(c)});r("mori.isList",function(a){return a?a.j&33554432||a.wc?!0:a.j?!1:w(Eb,a):w(Eb,a)});r("mori.isSeq",kd);r("mori.isVector",ed);r("mori.isMap",dd);r("mori.isSet",ad);r("mori.isKeyword",function(a){return a instanceof U});r("mori.isSymbol",function(a){return a instanceof qc});
+r("mori.isCollection",$c);r("mori.isSequential",cd);r("mori.isAssociative",bd);r("mori.isCounted",Ec);r("mori.isIndexed",Fc);r("mori.isReduceable",function(a){return a?a.j&524288||a.Sb?!0:a.j?!1:w(vb,a):w(vb,a)});r("mori.isSeqable",ld);r("mori.isReversible",Id);r("mori.union",Rh);r("mori.union.f0",Rh.l);r("mori.union.f1",Rh.b);r("mori.union.f2",Rh.a);r("mori.union.fn",Rh.K);r("mori.intersection",Sh);r("mori.intersection.f1",Sh.b);r("mori.intersection.f2",Sh.a);r("mori.intersection.fn",Sh.K);
+r("mori.difference",Th);r("mori.difference.f1",Th.b);r("mori.difference.f2",Th.a);r("mori.difference.fn",Th.K);r("mori.join",Xh);r("mori.join.f2",Xh.a);r("mori.join.f3",Xh.c);r("mori.index",Vh);r("mori.project",function(a,b){return fh(Oe.a(function(a){return Yg(a,b)},a))});r("mori.mapInvert",Wh);r("mori.rename",function(a,b){return fh(Oe.a(function(a){return Uh(a,b)},a))});r("mori.renameKeys",Uh);r("mori.isSubset",function(a,b){return Q(a)<=Q(b)&&Ee(function(a){return nd(b,a)},a)});
+r("mori.isSuperset",function(a,b){return Q(a)>=Q(b)&&Ee(function(b){return nd(a,b)},b)});r("mori.notEquals",je);r("mori.notEquals.f1",je.b);r("mori.notEquals.f2",je.a);r("mori.notEquals.fn",je.K);r("mori.gt",Ad);r("mori.gt.f1",Ad.b);r("mori.gt.f2",Ad.a);r("mori.gt.fn",Ad.K);r("mori.gte",Bd);r("mori.gte.f1",Bd.b);r("mori.gte.f2",Bd.a);r("mori.gte.fn",Bd.K);r("mori.lt",yd);r("mori.lt.f1",yd.b);r("mori.lt.f2",yd.a);r("mori.lt.fn",yd.K);r("mori.lte",zd);r("mori.lte.f1",zd.b);r("mori.lte.f2",zd.a);
+r("mori.lte.fn",zd.K);r("mori.compare",od);r("mori.partial",Je);r("mori.partial.f1",Je.b);r("mori.partial.f2",Je.a);r("mori.partial.f3",Je.c);r("mori.partial.f4",Je.n);r("mori.partial.fn",Je.K);r("mori.comp",Ie);r("mori.comp.f0",Ie.l);r("mori.comp.f1",Ie.b);r("mori.comp.f2",Ie.a);r("mori.comp.f3",Ie.c);r("mori.comp.fn",Ie.K);
+r("mori.pipeline",function(){function a(a){var d=null;if(0<arguments.length){for(var d=0,e=Array(arguments.length-0);d<e.length;)e[d]=arguments[d+0],++d;d=new F(e,0)}return b.call(this,d)}function b(a){function b(a,c){return c.b?c.b(a):c.call(null,a)}return A.a?A.a(b,a):A.call(null,b,a)}a.i=0;a.f=function(a){a=D(a);return b(a)};a.d=b;return a}());
+r("mori.curry",function(){function a(a,d){var e=null;if(1<arguments.length){for(var e=0,f=Array(arguments.length-1);e<f.length;)f[e]=arguments[e+1],++e;e=new F(f,0)}return b.call(this,a,e)}function b(a,b){return function(e){return T.a(a,M.a?M.a(e,b):M.call(null,e,b))}}a.i=1;a.f=function(a){var d=G(a);a=H(a);return b(d,a)};a.d=b;return a}());
+r("mori.juxt",function(){function a(a){var d=null;if(0<arguments.length){for(var d=0,e=Array(arguments.length-0);d<e.length;)e[d]=arguments[d+0],++d;d=new F(e,0)}return b.call(this,d)}function b(a){return function(){function b(a){var c=null;if(0<arguments.length){for(var c=0,d=Array(arguments.length-0);c<d.length;)d[c]=arguments[c+0],++c;c=new F(d,0)}return e.call(this,c)}function e(b){var d=function(){function d(a){return T.a(a,b)}return Oe.a?Oe.a(d,a):Oe.call(null,d,a)}();return Ia.b?Ia.b(d):Ia.call(null,
+d)}b.i=0;b.f=function(a){a=D(a);return e(a)};b.d=e;return b}()}a.i=0;a.f=function(a){a=D(a);return b(a)};a.d=b;return a}());
+r("mori.knit",function(){function a(a){var d=null;if(0<arguments.length){for(var d=0,e=Array(arguments.length-0);d<e.length;)e[d]=arguments[d+0],++d;d=new F(e,0)}return b.call(this,d)}function b(a){return function(b){var e=function(){function e(a,b){return a.b?a.b(b):a.call(null,b)}return Oe.c?Oe.c(e,a,b):Oe.call(null,e,a,b)}();return Ia.b?Ia.b(e):Ia.call(null,e)}}a.i=0;a.f=function(a){a=D(a);return b(a)};a.d=b;return a}());r("mori.sum",xd);r("mori.sum.f0",xd.l);r("mori.sum.f1",xd.b);
+r("mori.sum.f2",xd.a);r("mori.sum.fn",xd.K);r("mori.inc",function(a){return a+1});r("mori.dec",function(a){return a-1});r("mori.isEven",Ge);r("mori.isOdd",function(a){return!Ge(a)});r("mori.each",function(a,b){for(var c=D(a),d=null,e=0,f=0;;)if(f<e){var g=d.Q(null,f);b.b?b.b(g):b.call(null,g);f+=1}else if(c=D(c))fd(c)?(e=Yb(c),c=Zb(c),d=e,e=Q(e)):(d=g=G(c),b.b?b.b(d):b.call(null,d),c=K(c),d=null,e=0),f=0;else return null});r("mori.identity",ud);
+r("mori.constantly",function(a){return function(){function b(b){if(0<arguments.length)for(var d=0,e=Array(arguments.length-0);d<e.length;)e[d]=arguments[d+0],++d;return a}b.i=0;b.f=function(b){D(b);return a};b.d=function(){return a};return b}()});r("mori.toJs",Kh);
+r("mori.toClj",function(){function a(a,b){return Ph.d(a,Kc([Oh,b],0))}function b(a){return Ph.b(a)}var c=null,c=function(c,e){switch(arguments.length){case 1:return b.call(this,c);case 2:return a.call(this,c,e)}throw Error("Invalid arity: "+arguments.length);};c.b=b;c.a=a;return c}());r("mori.configure",function(a,b){switch(a){case "print-length":return la=b;case "print-level":return ma=b;default:throw Error([z("No matching clause: "),z(a)].join(""));}});r("mori.meta",Vc);r("mori.withMeta",O);
+r("mori.varyMeta",ie);r("mori.varyMeta.f2",ie.a);r("mori.varyMeta.f3",ie.c);r("mori.varyMeta.f4",ie.n);r("mori.varyMeta.f5",ie.r);r("mori.varyMeta.f6",ie.P);r("mori.varyMeta.fn",ie.K);r("mori.alterMeta",Dh);r("mori.resetMeta",function(a,b){return a.k=b});V.prototype.inspect=function(){return this.toString()};F.prototype.inspect=function(){return this.toString()};Hc.prototype.inspect=function(){return this.toString()};wg.prototype.inspect=function(){return this.toString()};pg.prototype.inspect=function(){return this.toString()};
+qg.prototype.inspect=function(){return this.toString()};Fd.prototype.inspect=function(){return this.toString()};Ld.prototype.inspect=function(){return this.toString()};Hd.prototype.inspect=function(){return this.toString()};W.prototype.inspect=function(){return this.toString()};Vd.prototype.inspect=function(){return this.toString()};Bf.prototype.inspect=function(){return this.toString()};Df.prototype.inspect=function(){return this.toString()};Z.prototype.inspect=function(){return this.toString()};
+X.prototype.inspect=function(){return this.toString()};pa.prototype.inspect=function(){return this.toString()};rg.prototype.inspect=function(){return this.toString()};Lg.prototype.inspect=function(){return this.toString()};$g.prototype.inspect=function(){return this.toString()};ch.prototype.inspect=function(){return this.toString()};ph.prototype.inspect=function(){return this.toString()};U.prototype.inspect=function(){return this.toString()};qc.prototype.inspect=function(){return this.toString()};
+Lf.prototype.inspect=function(){return this.toString()};Kf.prototype.inspect=function(){return this.toString()};r("mori.mutable.thaw",function(a){return Ob(a)});r("mori.mutable.freeze",ce);r("mori.mutable.conj",de);r("mori.mutable.conj.f0",de.l);r("mori.mutable.conj.f1",de.b);r("mori.mutable.conj.f2",de.a);r("mori.mutable.conj.fn",de.K);r("mori.mutable.assoc",ee);r("mori.mutable.assoc.f3",ee.c);r("mori.mutable.assoc.fn",ee.K);r("mori.mutable.dissoc",fe);r("mori.mutable.dissoc.f2",fe.a);r("mori.mutable.dissoc.fn",fe.K);r("mori.mutable.pop",function(a){return Ub(a)});r("mori.mutable.disj",ge);
+r("mori.mutable.disj.f2",ge.a);r("mori.mutable.disj.fn",ge.K);;return this.mori;}.call({});});

extra/js/makefile

@@ -0,0 +1,29 @@
+
+BOOST=.
+EMCXX=em++
+EMCXXFLAGS=-O3 -std=c++14 --bind \
+	-I ../.. \
+	-I $(BOOST)
+WASM_BACKEND=0
+
+ALL= \
+	out/immer.asmjs.js \
+	out/immer.asmjs.html \
+	out/immer.wasm.js \
+	out/immer.wasm.html
+
+all: $(ALL)
+
+out/immer.asmjs.js: immer.cpp
+	@mkdir -p $(@D)
+	$(EMCXX) $(EMCXXFLAGS) $< -o $@
+
+out/immer.wasm.js: immer.cpp
+	@mkdir -p $(@D)
+	EMCC_WASM_BACKEND=$(WASM_BACKEND) $(EMCXX) -s WASM=1 $(EMCXXFLAGS) $< -o $@
+
+%.html: %.js index.tpl.html
+	sed s/%IMMER_JS%/`basename $<`/ < index.tpl.html > $@
+
+clean:
+	rm -f $(ALL)

extra/python/CMakeLists.txt

@@ -0,0 +1,46 @@
+
+option(USE_PYBIND "bind with pybind1" off)
+option(USE_BOOST_PYTHON  "bind with boost::python" off)
+
+if (USE_PYBIND)
+  set(PYBIND11_CPP_STANDARD -std=c++14)
+  find_package(Boost 1.56 REQUIRED)
+  add_subdirectory(lib/pybind11)
+  pybind11_add_module(immer_python_module src/immer-pybind.cpp)
+  target_link_libraries(immer_python_module PUBLIC
+    immer)
+
+elseif(USE_BOOST_PYTHON)
+  find_package(PythonInterp)
+  find_package(PythonLibs)
+  find_package(Boost 1.56 COMPONENTS python)
+  python_add_module(immer_python_module src/immer-boost.cpp)
+  include_directories(immer_python_module PUBLIC
+    ${immer_include_dir}
+    ${Boost_INCLUDE_DIRS}
+    ${PYTHON_INCLUDE_DIRS})
+  target_link_libraries(immer_python_module PUBLIC
+    immer
+    ${Boost_LIBRARIES}
+    ${PYTHON_LIBRARIES})
+
+else()
+  find_package(PythonInterp)
+  find_package(PythonLibs)
+
+  if (NOT PYTHONLIBS_FOUND)
+    message(STATUS "Disabling Python modules")
+    return()
+  endif()
+
+  python_add_module(immer_python_module EXCLUDE_FROM_ALL
+    src/immer-raw.cpp)
+  target_include_directories(immer_python_module PUBLIC
+    ${PYTHON_INCLUDE_DIRS})
+  target_link_libraries(immer_python_module PUBLIC
+    immer
+    ${PYTHON_LIBRARIES})
+
+endif()
+
+add_custom_target(python DEPENDS immer_python_module)

extra/python/README.rst

@@ -0,0 +1,42 @@
+
+Python bindings
+===============
+
+This library includes experimental bindings bring efficient immutable
+vectors for the Python language.  They were developed as part of the
+research for the `ICFP'17 paper`_.  The interface is quite
+**incomplete**, yet you can already do some things like:
+
+.. literalinclude:: ../extra/python/example.py
+   :language: python
+   :start-after: intro/start
+   :end-before:  intro/end
+..
+
+    **Do you want to help** making these bindings complete and production
+    ready?  Drop a line at `immer@sinusoid.al
+    <mailto:immer@sinusoid.al>`_ or `open an issue on Github
+    <https://github.com/arximboldi/immer>`_
+
+Installation
+------------
+::
+
+    pip install --user git+https://github.com/arximboldi/immer.git
+
+Benchmarks
+----------
+
+The library includes a set of benchmarks that compare it to
+`pyrsistent <https://github.com/tobgu/pyrsistent>`_.  You can see the
+results in the `ICFP'17 paper`_.  If you want to run them yourself,
+you need to install some dependencies::
+
+     pip install --user pytest-benchmark pyrsistent
+
+Then you need to clone the `project repository
+<https://github.com/arximboldi/immer>`_ and from its root, run::
+
+     pytest extra/python/benchmark
+
+.. _ICFP'17 paper: https://public.sinusoid.es/misc/immer/immer-icfp17.pdf

extra/python/benchmark/test_benchmarks.py

@@ -0,0 +1,45 @@
+
+# immer: immutable data structures for C++
+# Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+#
+# This software is distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+
+##
+
+import immer
+import pyrsistent
+
+BENCHMARK_SIZE = 1000
+
+def push(v, n=BENCHMARK_SIZE):
+    for x in xrange(n):
+        v = v.append(x)
+    return v
+
+def assoc(v):
+    for i in xrange(len(v)):
+        v = v.set(i, i+1)
+    return v
+
+def index(v):
+    for i in xrange(len(v)):
+        v[i]
+
+def test_push_immer(benchmark):
+    benchmark(push, immer.Vector())
+
+def test_push_pyrsistent(benchmark):
+    benchmark(push, pyrsistent.pvector())
+
+def test_assoc_immer(benchmark):
+    benchmark(assoc, push(immer.Vector()))
+
+def test_assoc_pyrsistent(benchmark):
+    benchmark(assoc, push(pyrsistent.pvector()))
+
+def test_index_immer(benchmark):
+    benchmark(index, push(immer.Vector()))
+
+def test_index_pyrsistent(benchmark):
+    benchmark(index, push(pyrsistent.pvector()))

extra/python/example.py

@@ -0,0 +1,21 @@
+#!/usr/bin/env python##
+
+# immer: immutable data structures for C++
+# Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+#
+# This software is distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+
+
+# include:intro/start
+import immer
+
+v0 = immer.Vector().append(13).append(42)
+assert v0[0] == 13
+assert v0[1] == 42
+assert len(v0) == 2
+
+v1 = v0.set(0, 12)
+assert v0.tolist() == [13, 42]
+assert v1.tolist() == [12, 42]
+# include:intro/end

extra/python/immer/__init__.py

@@ -0,0 +1,2 @@
+
+from immer_python_module import *

extra/python/lib/pybind11

@@ -0,0 +1 @@
+Subproject commit 1eaacd19f6de9a053570c21de6d173efc2304bc2

extra/python/src/immer-boost.cpp

@@ -0,0 +1,80 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include <boost/python.hpp>
+#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
+
+#include <immer/vector.hpp>
+#include <immer/refcount/unsafe_refcount_policy.hpp>
+
+namespace {
+
+struct heap_t
+{
+    template <typename ...Tags>
+    static void* allocate(std::size_t size, Tags...)
+    {
+        return PyMem_Malloc(size);
+    }
+
+    template <typename ...Tags>
+    static void deallocate(std::size_t, void* obj, Tags...)
+    {
+        PyMem_Free(obj);
+    }
+};
+
+using memory_t = immer::memory_policy<
+    immer::unsafe_free_list_heap_policy<heap_t>,
+    immer::unsafe_refcount_policy>;
+
+template <typename Vector>
+struct immer_vector_indexing_suite : boost::python::vector_indexing_suite<
+    Vector, true, immer_vector_indexing_suite<Vector>>
+{
+    using value_t = typename Vector::value_type;
+    using index_t = typename Vector::size_type;
+    using object_t = boost::python::object;
+
+    static void forbidden() { throw std::runtime_error{"immutable!"}; }
+    static void todo() { throw std::runtime_error{"TODO!"}; }
+
+    static const value_t& get_item(const Vector& v, index_t i) { return v[i]; }
+    static object_t get_slice(const Vector&, index_t, index_t) { todo(); }
+
+    static void set_item(const Vector&, index_t, const value_t&) { forbidden(); }
+    static void delete_item(const Vector&, index_t) { forbidden(); }
+    static void set_slice(const Vector&, index_t, index_t, const value_t&) { forbidden(); }
+    static void delete_slice(const Vector&, index_t, index_t) { forbidden(); }
+    template <typename Iter>
+    static void set_slice(const Vector&, index_t, index_t, Iter, Iter) { forbidden(); }
+    template <class Iter>
+    static void extend(const Vector& container, Iter, Iter) { forbidden(); }
+};
+
+} // anonymous namespace
+
+
+BOOST_PYTHON_MODULE(immer_python_module)
+{
+    using namespace boost::python;
+
+    using vector_t = immer::vector<object, memory_t>;
+
+    class_<vector_t>("Vector")
+        .def(immer_vector_indexing_suite<vector_t>())
+        .def("append",
+             +[] (const vector_t& v, object x) {
+                 return v.push_back(std::move(x));
+              })
+        .def("set",
+             +[] (const vector_t& v, std::size_t i, object x) {
+                 return v.set(i, std::move(x));
+              })
+        ;
+}

extra/python/src/immer-pybind.cpp

@@ -0,0 +1,77 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+#include <pybind11/pybind11.h>
+
+#include <immer/vector.hpp>
+#include <immer/refcount/unsafe_refcount_policy.hpp>
+
+namespace {
+
+struct heap_t
+{
+    template <typename ...Tags>
+    static void* allocate(std::size_t size, Tags...)
+    {
+        return PyMem_Malloc(size);
+    }
+
+    template <typename ...Tags>
+    static void deallocate(std::size_t, void* obj, Tags...)
+    {
+        PyMem_Free(obj);
+    }
+};
+
+using memory_t = immer::memory_policy<
+    immer::unsafe_free_list_heap_policy<heap_t>,
+    immer::unsafe_refcount_policy>;
+
+} // anonymous namespace
+
+namespace py = pybind11;
+
+PYBIND11_PLUGIN(immer_python_module)
+{
+    py::module m("immer", R"pbdoc(
+        Immer
+        -----
+        .. currentmodule:: immer
+        .. autosummary::
+           :toctree: _generate
+           Vector
+    )pbdoc");
+
+    using vector_t = immer::vector<py::object, memory_t>;
+
+    py::class_<vector_t>(m, "Vector")
+        .def(py::init<>())
+        .def("__len__", &vector_t::size)
+        .def("__getitem__",
+             [] (const vector_t& v, std::size_t i) {
+                 if (i > v.size())
+                     throw py::index_error{"Index out of range"};
+                 return v[i];
+             })
+        .def("append",
+             [] (const vector_t& v, py::object x) {
+                 return v.push_back(std::move(x));
+             })
+        .def("set",
+             [] (const vector_t& v, std::size_t i, py::object x) {
+                 return v.set(i, std::move(x));
+             });
+
+#ifdef VERSION_INFO
+    m.attr("__version__") = py::str(VERSION_INFO);
+#else
+    m.attr("__version__") = py::str("dev");
+#endif
+
+    return m.ptr();
+}

extra/python/src/immer-raw.cpp

@@ -0,0 +1,402 @@
+//
+// immer: immutable data structures for C++
+// Copyright (C) 2016, 2017, 2018 Juan Pedro Bolivar Puente
+//
+// This software is distributed under the Boost Software License, Version 1.0.
+// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
+//
+
+extern "C" {
+#include <Python.h>
+#include <structmember.h>
+}
+
+#include <immer/vector.hpp>
+#include <immer/algorithm.hpp>
+#include <immer/refcount/unsafe_refcount_policy.hpp>
+
+#include <iostream>
+
+namespace {
+
+struct heap_t
+{
+    template <typename ...Tags>
+    static void* allocate(std::size_t size, Tags...)
+    {
+        return PyMem_Malloc(size);
+    }
+
+    template <typename ...Tags>
+    static void deallocate(std::size_t, void* obj, Tags...)
+    {
+        PyMem_Free(obj);
+    }
+};
+
+struct object_t
+{
+    struct wrap_t {};
+    struct adopt_t {};
+
+    PyObject* ptr_ = nullptr;
+
+    object_t() = delete;
+    ~object_t() { Py_XDECREF(ptr_); }
+
+    explicit object_t(PyObject* p, wrap_t)  : ptr_{p} {}
+    explicit object_t(PyObject* p, adopt_t) : ptr_{p}
+    {
+        assert(p);
+        Py_INCREF(p);
+    }
+
+    static object_t wrap(PyObject* p)  { return object_t{p, wrap_t{}}; }
+    static object_t adopt(PyObject* p) { return object_t{p, adopt_t{}}; }
+
+    object_t(const object_t& o) : ptr_(o.ptr_) { Py_INCREF(ptr_); }
+    object_t(object_t&& o) { std::swap(ptr_, o.ptr_); }
+
+    object_t& operator=(const object_t& o)
+    {
+        Py_XINCREF(o.ptr_);
+        Py_XDECREF(ptr_);
+        ptr_ = o.ptr_;
+        return *this;
+    }
+    object_t& operator=(object_t&& o)
+    {
+        std::swap(ptr_, o.ptr_);
+        return *this;
+    }
+
+    PyObject* release()
+    {
+        auto p = ptr_;
+        ptr_ = nullptr;
+        return p;
+    }
+
+    PyObject* get() const { return ptr_; }
+};
+
+using memory_t = immer::memory_policy<
+    immer::unsafe_free_list_heap_policy<heap_t>,
+    immer::unsafe_refcount_policy>;
+
+using vector_impl_t = immer::vector<object_t, memory_t>;
+
+struct vector_t
+{
+    PyObject_HEAD
+    vector_impl_t impl;
+    PyObject*     in_weakreflist;
+
+    static PyTypeObject type;
+};
+
+vector_t* empty_vector = nullptr;
+
+vector_t* make_vector()
+{
+    auto* v = PyObject_GC_New(vector_t, &vector_t::type);
+    new (&v->impl) vector_impl_t{};
+    v->in_weakreflist = nullptr;
+    PyObject_GC_Track((PyObject*)v);
+    return v;
+}
+
+vector_t* make_vector(vector_impl_t&& impl)
+{
+    auto v = PyObject_GC_New(vector_t, &vector_t::type);
+    new (&v->impl) vector_impl_t{std::move(impl)};
+    v->in_weakreflist = nullptr;
+    PyObject_GC_Track((PyObject*)v);
+    return v;
+}
+
+auto todo()
+{
+    PyErr_SetString(PyExc_RuntimeError, "immer: todo!");
+    return nullptr;
+}
+
+void vector_dealloc(vector_t* self)
+{
+    if (self->in_weakreflist != nullptr)
+        PyObject_ClearWeakRefs((PyObject*)self);
+
+    PyObject_GC_UnTrack((PyObject*)self);
+    Py_TRASHCAN_SAFE_BEGIN(self);
+
+    self->impl.~vector_impl_t();
+
+    PyObject_GC_Del(self);
+    Py_TRASHCAN_SAFE_END(self);
+}
+
+PyObject* vector_to_list(vector_t* self)
+{
+    auto list = PyList_New(self->impl.size());
+    auto idx  = 0;
+    immer::for_each(self->impl, [&] (auto&& obj) {
+            auto o = obj.get();
+            Py_INCREF(o);
+            PyList_SET_ITEM(list, idx, o);
+            ++idx;
+        });
+    return list;
+}
+
+PyObject* vector_repr(vector_t *self)
+{
+    auto list = vector_to_list(self);
+    auto list_repr = PyObject_Repr(list);
+    Py_DECREF(list);
+
+    if (!list_repr) return nullptr;
+
+#if PY_MAJOR_VERSION >= 3
+    auto s = PyUnicode_FromFormat("%s%U%s", "immer.vector(", list_repr, ")");
+    Py_DECREF(list_repr);
+#else
+    auto s = PyString_FromString("immer.vector(");
+    PyString_ConcatAndDel(&s, list_repr);
+    PyString_ConcatAndDel(&s, PyString_FromString(")"));
+#endif
+    return s;
+}
+
+Py_ssize_t vector_len(vector_t* self)
+{
+    return self->impl.size();
+}
+
+PyObject* vector_extend(vector_t* self, PyObject* iterable)
+{
+    return todo();
+}
+
+vector_t* vector_append(vector_t* self, PyObject *obj)
+{
+    assert(obj != nullptr);
+    return make_vector(self->impl.push_back(object_t::adopt(obj)));
+}
+
+vector_t* vector_set(vector_t* self, PyObject* args)
+{
+    PyObject* obj = nullptr;
+    Py_ssize_t pos;
+    // the n parses for size, the O parses for a Python object
+    if(!PyArg_ParseTuple(args, "nO", &pos, &obj)) {
+        return nullptr;
+    }
+    if (pos < 0)
+        pos += self->impl.size();
+    if (pos < 0 || pos > (Py_ssize_t)self->impl.size()) {
+        PyErr_Format(PyExc_IndexError, "Index out of range: %zi", pos);
+        return nullptr;
+    }
+    return make_vector(self->impl.set(pos, object_t::adopt(obj)));
+}
+
+PyObject* vector_new(PyTypeObject* subtype, PyObject *args, PyObject *kwds)
+{
+    Py_INCREF(empty_vector);
+    return (PyObject*)empty_vector;
+}
+
+long vector_hash(vector_t* self)
+{
+    todo();
+    return 0;
+}
+
+PyObject* vector_get_item(vector_t* self, Py_ssize_t pos)
+{
+    if (pos < 0)
+        pos += self->impl.size();
+    if (pos < 0 || pos >= (Py_ssize_t)self->impl.size()) {
+        PyErr_Format(PyExc_IndexError, "Index out of range: %zi", pos);
+        return nullptr;
+    }
+    auto r = self->impl[pos];
+    return r.release();
+}
+
+PyObject* vector_subscript(vector_t* self, PyObject* item)
+{
+    if (PyIndex_Check(item)) {
+        auto i = PyNumber_AsSsize_t(item, PyExc_IndexError);
+        if (i == -1 && PyErr_Occurred())
+            return nullptr;
+        return vector_get_item(self, i);
+    } else if (PySlice_Check(item)) {
+        return todo();
+    } else {
+        PyErr_Format(PyExc_TypeError,
+                     "vector indices must be integers, not %.200s",
+                     Py_TYPE(item)->tp_name);
+        return nullptr;
+    }
+}
+
+PyObject* vector_repeat(vector_t* self, Py_ssize_t n)
+{
+    return todo();
+}
+
+int vector_traverse(vector_t* self, visitproc visit, void* arg)
+{
+    auto result = 0;
+    immer::all_of(self->impl, [&] (auto&& o) {
+            return 0 == (result = [&] {
+                Py_VISIT(o.get());
+                return 0;
+            }());
+        });
+    return result;
+}
+
+PyObject* vector_richcompare(PyObject* v, PyObject* w, int op)
+{
+    return todo();
+}
+
+PyObject* vector_iter(PyObject* self)
+{
+    return todo();
+}
+
+PyMethodDef vector_methods[] =
+{
+    {"append",      (PyCFunction)vector_append, METH_O, "Appends an element"},
+    {"set",         (PyCFunction)vector_set, METH_VARARGS, "Inserts an element at the specified position"},
+    {"extend",      (PyCFunction)vector_extend, METH_O|METH_COEXIST, "Extend"},
+    {"tolist",      (PyCFunction)vector_to_list, METH_NOARGS, "Convert to list"},
+    {0}
+};
+
+PyMemberDef vector_members[] =
+{
+    {0}  /* sentinel */
+};
+
+PySequenceMethods vector_sequence_methods =
+{
+    (lenfunc)vector_len,             /* sq_length */
+    (binaryfunc)vector_extend,       /* sq_concat */
+    (ssizeargfunc)vector_repeat,     /* sq_repeat */
+    (ssizeargfunc)vector_get_item,   /* sq_item */
+    0,                               /* sq_slice */
+    0,                               /* sq_ass_item */
+    0,                               /* sq_ass_slice */
+    0,                               /* sq_contains */
+    0,                               /* sq_inplace_concat */
+    0,                               /* sq_inplace_repeat */
+};
+
+PyMappingMethods vector_mapping_methods =
+{
+    (lenfunc)vector_len,
+    (binaryfunc)vector_subscript,
+    0
+};
+
+PyTypeObject vector_t::type =
+{
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "immer.Vector",                             /* tp_name        */
+    sizeof(vector_t),                           /* tp_basicsize   */
+    0,		                                /* tp_itemsize    */
+    (destructor)vector_dealloc,                 /* tp_dealloc     */
+    0,                                          /* tp_print       */
+    0,                                          /* tp_getattr     */
+    0,                                          /* tp_setattr     */
+    0,                                          /* tp_compare     */
+    (reprfunc)vector_repr,                      /* tp_repr        */
+    0,                                          /* tp_as_number   */
+    &vector_sequence_methods,                   /* tp_as_sequence */
+    &vector_mapping_methods,                    /* tp_as_mapping  */
+    (hashfunc)vector_hash,                      /* tp_hash        */
+    0,                                          /* tp_call        */
+    0,                                          /* tp_str         */
+    0,                                          /* tp_getattro    */
+    0,                                          /* tp_setattro    */
+    0,                                          /* tp_as_buffer   */
+    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,    /* tp_flags       */
+    "",                                         /* tp_doc         */
+    (traverseproc)vector_traverse,              /* tp_traverse       */
+    0,                                          /* tp_clear          */
+    vector_richcompare,                         /* tp_richcompare    */
+    offsetof(vector_t, in_weakreflist),         /* tp_weaklistoffset */
+    vector_iter,                                /* tp_iter           */
+    0,                                          /* tp_iternext       */
+    vector_methods,                             /* tp_methods        */
+    vector_members,                             /* tp_members        */
+    0,                                          /* tp_getset         */
+    0,                                          /* tp_base           */
+    0,                                          /* tp_dict           */
+    0,                                          /* tp_descr_get      */
+    0,                                          /* tp_descr_set      */
+    0,                                          /* tp_dictoffset     */
+    0,                                          /* tp_init           */
+    0,                                          /* tp_alloc */
+    vector_new,                                 /* tp_new   */
+};
+
+#if PY_MAJOR_VERSION >= 3
+struct PyModuleDef module_def =
+{
+    PyModuleDef_HEAD_INIT,
+    "immer_python_module", /* m_name */
+    "",                  /* m_doc */
+    -1,                  /* m_size */
+    /module_methods,     /* m_methods */
+    0,                   /* m_reload */
+    0,                   /* m_traverse */
+    0,                   /* m_clear */
+    0,                   /* m_free */
+};
+#endif
+
+PyMethodDef module_methods[] = {
+    {0, 0, 0, 0}
+};
+
+PyObject* module_init()
+{
+    if (PyType_Ready(&vector_t::type) < 0)
+        return nullptr;
+
+#if PY_MAJOR_VERSION >= 3
+    auto m = PyModule_Create(&module_def);
+#else
+    auto m = Py_InitModule3("immer_python_module", module_methods, "");
+#endif
+    if (!m)
+        return nullptr;
+
+    if (!empty_vector)
+        empty_vector = make_vector();
+
+    Py_INCREF(&vector_t::type);
+    PyModule_AddObject(m, "Vector", (PyObject*) &vector_t::type);
+    return m;
+}
+
+} // anonymous namespace
+
+extern "C" {
+#if PY_MAJOR_VERSION >= 3
+PyMODINIT_FUNC PyInit_immer_python_module()
+{
+    return module_init();
+}
+#else
+PyMODINIT_FUNC initimmer_python_module()
+{
+    module_init();
+}
+#endif
+}