Initial commit
This commit is contained in:
Griffin Smith
commit
80f8ede0bb
24 changed files with 2316 additions and 0 deletions
1
.envrc
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.envrc
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@ -0,0 +1 @@
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eval "$(lorri direnv)"
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.gitignore
vendored
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.gitignore
vendored
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/target
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789
Cargo.lock
generated
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Cargo.lock
generated
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@ -0,0 +1,789 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "8018d24e04c95ac8790716a5987d0fec4f8b27249ffa0f7d33f1369bdfb88cbd"
|
||||||
|
dependencies = [
|
||||||
|
"once_cell",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "ucd-trie"
|
||||||
|
version = "0.1.3"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-segmentation"
|
||||||
|
version = "1.7.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-width"
|
||||||
|
version = "0.1.8"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-xid"
|
||||||
|
version = "0.2.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "vec_map"
|
||||||
|
version = "0.8.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "version_check"
|
||||||
|
version = "0.9.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wait-timeout"
|
||||||
|
version = "0.2.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "9f200f5b12eb75f8c1ed65abd4b2db8a6e1b138a20de009dacee265a2498f3f6"
|
||||||
|
dependencies = [
|
||||||
|
"libc",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasi"
|
||||||
|
version = "0.10.2+wasi-snapshot-preview1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "fd6fbd9a79829dd1ad0cc20627bf1ed606756a7f77edff7b66b7064f9cb327c6"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi"
|
||||||
|
version = "0.3.9"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
|
||||||
|
dependencies = [
|
||||||
|
"winapi-i686-pc-windows-gnu",
|
||||||
|
"winapi-x86_64-pc-windows-gnu",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-i686-pc-windows-gnu"
|
||||||
|
version = "0.4.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-util"
|
||||||
|
version = "0.1.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
|
||||||
|
dependencies = [
|
||||||
|
"winapi",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-x86_64-pc-windows-gnu"
|
||||||
|
version = "0.4.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wyz"
|
||||||
|
version = "0.2.0"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"
|
||||||
18
Cargo.toml
Normal file
18
Cargo.toml
Normal file
|
|
@ -0,0 +1,18 @@
|
||||||
|
[package]
|
||||||
|
name = "achilles"
|
||||||
|
version = "0.1.0"
|
||||||
|
authors = ["Griffin Smith <root@gws.fyi>"]
|
||||||
|
edition = "2018"
|
||||||
|
|
||||||
|
[dependencies]
|
||||||
|
anyhow = "1.0.38"
|
||||||
|
clap = "3.0.0-beta.2"
|
||||||
|
derive_more = "0.99.11"
|
||||||
|
inkwell = { git = "https://github.com/TheDan64/inkwell", branch = "master", features = ["llvm11-0"] }
|
||||||
|
llvm-sys = "110.0.1"
|
||||||
|
nom = "6.1.2"
|
||||||
|
nom-trace = { git = "https://github.com/glittershark/nom-trace", branch = "nom-6" }
|
||||||
|
pratt = "0.3.0"
|
||||||
|
proptest = "1.0.0"
|
||||||
|
test-strategy = "0.1.1"
|
||||||
|
thiserror = "1.0.24"
|
||||||
2
ach/.gitignore
vendored
Normal file
2
ach/.gitignore
vendored
Normal file
|
|
@ -0,0 +1,2 @@
|
||||||
|
*.ll
|
||||||
|
*.o
|
||||||
15
ach/Makefile
Normal file
15
ach/Makefile
Normal file
|
|
@ -0,0 +1,15 @@
|
||||||
|
default: simple
|
||||||
|
|
||||||
|
%.ll: %.ach
|
||||||
|
cargo run -- compile $< -o $@ -f llvm
|
||||||
|
|
||||||
|
%.o: %.ll
|
||||||
|
llc $< -o $@ -filetype=obj
|
||||||
|
|
||||||
|
%: %.o
|
||||||
|
clang $< -o $@
|
||||||
|
|
||||||
|
.PHONY: clean
|
||||||
|
|
||||||
|
clean:
|
||||||
|
@rm -f *.ll *.o simple
|
||||||
3
ach/functions.ach
Normal file
3
ach/functions.ach
Normal file
|
|
@ -0,0 +1,3 @@
|
||||||
|
fn id x = x
|
||||||
|
fn plus x y = x + y
|
||||||
|
fn main = plus (id 2) 7
|
||||||
1
ach/simple.ach
Normal file
1
ach/simple.ach
Normal file
|
|
@ -0,0 +1 @@
|
||||||
|
fn main = let x = 2; y = 3 in x + y
|
||||||
20
shell.nix
Normal file
20
shell.nix
Normal file
|
|
@ -0,0 +1,20 @@
|
||||||
|
with import (builtins.fetchTarball {
|
||||||
|
url = "https://github.com/nixos/nixpkgs/archive/93a812bb9f9c398bd5b9636ab3674dcfe8cfb884.tar.gz";
|
||||||
|
sha256 = "14zzsgnigd7vjbrpzm1s4qsknm73sci38ss00x96wamz6psaxyah";
|
||||||
|
}) {};
|
||||||
|
|
||||||
|
mkShell {
|
||||||
|
buildInputs = [
|
||||||
|
clang_11
|
||||||
|
llvm_11.lib
|
||||||
|
llvmPackages_11.bintools
|
||||||
|
llvmPackages_11.clang
|
||||||
|
llvmPackages_11.libclang.lib
|
||||||
|
zlib
|
||||||
|
ncurses
|
||||||
|
libxml2
|
||||||
|
libffi
|
||||||
|
pkg-config
|
||||||
|
];
|
||||||
|
|
||||||
|
}
|
||||||
166
src/ast/mod.rs
Normal file
166
src/ast/mod.rs
Normal file
|
|
@ -0,0 +1,166 @@
|
||||||
|
use std::borrow::Cow;
|
||||||
|
use std::convert::TryFrom;
|
||||||
|
use std::fmt::{self, Display, Formatter};
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub struct InvalidIdentifier<'a>(Cow<'a, str>);
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq, Hash)]
|
||||||
|
pub struct Ident<'a>(pub Cow<'a, str>);
|
||||||
|
|
||||||
|
impl<'a> From<&'a Ident<'a>> for &'a str {
|
||||||
|
fn from(id: &'a Ident<'a>) -> Self {
|
||||||
|
id.0.as_ref()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> Display for Ident<'a> {
|
||||||
|
fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
|
||||||
|
write!(f, "{}", self.0)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> Ident<'a> {
|
||||||
|
pub fn to_owned(&self) -> Ident<'static> {
|
||||||
|
Ident(Cow::Owned(self.0.clone().into_owned()))
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn from_str_unchecked(s: &'a str) -> Self {
|
||||||
|
debug_assert!(is_valid_identifier(s));
|
||||||
|
Self(Cow::Borrowed(s))
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn from_string_unchecked(s: String) -> Self {
|
||||||
|
debug_assert!(is_valid_identifier(&s));
|
||||||
|
Self(Cow::Owned(s))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn is_valid_identifier<S>(s: &S) -> bool
|
||||||
|
where
|
||||||
|
S: AsRef<str> + ?Sized,
|
||||||
|
{
|
||||||
|
s.as_ref()
|
||||||
|
.chars()
|
||||||
|
.any(|c| !c.is_alphanumeric() || !"_".contains(c))
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> TryFrom<&'a str> for Ident<'a> {
|
||||||
|
type Error = InvalidIdentifier<'a>;
|
||||||
|
|
||||||
|
fn try_from(s: &'a str) -> Result<Self, Self::Error> {
|
||||||
|
if is_valid_identifier(s) {
|
||||||
|
Ok(Ident(Cow::Borrowed(s)))
|
||||||
|
} else {
|
||||||
|
Err(InvalidIdentifier(Cow::Borrowed(s)))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> TryFrom<String> for Ident<'a> {
|
||||||
|
type Error = InvalidIdentifier<'static>;
|
||||||
|
|
||||||
|
fn try_from(s: String) -> Result<Self, Self::Error> {
|
||||||
|
if is_valid_identifier(&s) {
|
||||||
|
Ok(Ident(Cow::Owned(s)))
|
||||||
|
} else {
|
||||||
|
Err(InvalidIdentifier(Cow::Owned(s)))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub enum BinaryOperator {
|
||||||
|
/// `+`
|
||||||
|
Add,
|
||||||
|
|
||||||
|
/// `-`
|
||||||
|
Sub,
|
||||||
|
|
||||||
|
/// `*`
|
||||||
|
Mul,
|
||||||
|
|
||||||
|
/// `/`
|
||||||
|
Div,
|
||||||
|
|
||||||
|
/// `^`
|
||||||
|
Pow,
|
||||||
|
|
||||||
|
/// `==`
|
||||||
|
Equ,
|
||||||
|
|
||||||
|
/// `!=`
|
||||||
|
Neq,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub enum UnaryOperator {
|
||||||
|
/// !
|
||||||
|
Not,
|
||||||
|
|
||||||
|
/// -
|
||||||
|
Neg,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub enum Literal {
|
||||||
|
Int(u64),
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub enum Expr<'a> {
|
||||||
|
Ident(Ident<'a>),
|
||||||
|
|
||||||
|
Literal(Literal),
|
||||||
|
|
||||||
|
UnaryOp {
|
||||||
|
op: UnaryOperator,
|
||||||
|
rhs: Box<Expr<'a>>,
|
||||||
|
},
|
||||||
|
|
||||||
|
BinaryOp {
|
||||||
|
lhs: Box<Expr<'a>>,
|
||||||
|
op: BinaryOperator,
|
||||||
|
rhs: Box<Expr<'a>>,
|
||||||
|
},
|
||||||
|
|
||||||
|
Let {
|
||||||
|
bindings: Vec<(Ident<'a>, Expr<'a>)>,
|
||||||
|
body: Box<Expr<'a>>,
|
||||||
|
},
|
||||||
|
|
||||||
|
If {
|
||||||
|
condition: Box<Expr<'a>>,
|
||||||
|
then: Box<Expr<'a>>,
|
||||||
|
else_: Box<Expr<'a>>,
|
||||||
|
},
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub struct Fun<'a> {
|
||||||
|
pub name: Ident<'a>,
|
||||||
|
pub args: Vec<Ident<'a>>,
|
||||||
|
pub body: Expr<'a>,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub enum Decl<'a> {
|
||||||
|
Fun(Fun<'a>),
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq, Clone, Copy)]
|
||||||
|
pub enum Type {
|
||||||
|
Int,
|
||||||
|
Float,
|
||||||
|
Bool,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Display for Type {
|
||||||
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||||
|
match self {
|
||||||
|
Self::Int => f.write_str("int"),
|
||||||
|
Self::Float => f.write_str("float"),
|
||||||
|
Self::Bool => f.write_str("bool"),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
282
src/codegen/llvm.rs
Normal file
282
src/codegen/llvm.rs
Normal file
|
|
@ -0,0 +1,282 @@
|
||||||
|
use std::path::Path;
|
||||||
|
use std::result;
|
||||||
|
|
||||||
|
use inkwell::basic_block::BasicBlock;
|
||||||
|
use inkwell::builder::Builder;
|
||||||
|
pub use inkwell::context::Context;
|
||||||
|
use inkwell::module::Module;
|
||||||
|
use inkwell::support::LLVMString;
|
||||||
|
use inkwell::types::FunctionType;
|
||||||
|
use inkwell::values::{BasicValueEnum, FunctionValue};
|
||||||
|
use inkwell::IntPredicate;
|
||||||
|
use thiserror::Error;
|
||||||
|
|
||||||
|
use crate::ast::{BinaryOperator, Decl, Expr, Fun, Ident, Literal, UnaryOperator};
|
||||||
|
use crate::common::env::Env;
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq, Error)]
|
||||||
|
pub enum Error {
|
||||||
|
#[error("Undefined variable {0}")]
|
||||||
|
UndefinedVariable(Ident<'static>),
|
||||||
|
|
||||||
|
#[error("LLVM Error: {0}")]
|
||||||
|
LLVMError(String),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl From<LLVMString> for Error {
|
||||||
|
fn from(s: LLVMString) -> Self {
|
||||||
|
Self::LLVMError(s.to_string())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub type Result<T> = result::Result<T, Error>;
|
||||||
|
|
||||||
|
pub struct Codegen<'ctx, 'ast> {
|
||||||
|
context: &'ctx Context,
|
||||||
|
pub module: Module<'ctx>,
|
||||||
|
builder: Builder<'ctx>,
|
||||||
|
env: Env<'ast, BasicValueEnum<'ctx>>,
|
||||||
|
function: Option<FunctionValue<'ctx>>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'ctx, 'ast> Codegen<'ctx, 'ast> {
|
||||||
|
pub fn new(context: &'ctx Context, module_name: &str) -> Self {
|
||||||
|
let module = context.create_module(module_name);
|
||||||
|
let builder = context.create_builder();
|
||||||
|
Self {
|
||||||
|
context,
|
||||||
|
module,
|
||||||
|
builder,
|
||||||
|
env: Default::default(),
|
||||||
|
function: None,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn new_function<'a>(
|
||||||
|
&'a mut self,
|
||||||
|
name: &str,
|
||||||
|
ty: FunctionType<'ctx>,
|
||||||
|
) -> &'a FunctionValue<'ctx> {
|
||||||
|
self.function = Some(self.module.add_function(name, ty, None));
|
||||||
|
let basic_block = self.append_basic_block("entry");
|
||||||
|
self.builder.position_at_end(basic_block);
|
||||||
|
self.function.as_ref().unwrap()
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn finish_function(&self, res: &BasicValueEnum<'ctx>) {
|
||||||
|
self.builder.build_return(Some(res));
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn append_basic_block(&self, name: &str) -> BasicBlock<'ctx> {
|
||||||
|
self.context
|
||||||
|
.append_basic_block(self.function.unwrap(), name)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn codegen_expr(&mut self, expr: &'ast Expr<'ast>) -> Result<BasicValueEnum<'ctx>> {
|
||||||
|
match expr {
|
||||||
|
Expr::Ident(id) => self
|
||||||
|
.env
|
||||||
|
.resolve(id)
|
||||||
|
.cloned()
|
||||||
|
.ok_or_else(|| Error::UndefinedVariable(id.to_owned())),
|
||||||
|
Expr::Literal(Literal::Int(i)) => {
|
||||||
|
let ty = self.context.i64_type();
|
||||||
|
Ok(BasicValueEnum::IntValue(ty.const_int(*i, false)))
|
||||||
|
}
|
||||||
|
Expr::UnaryOp { op, rhs } => {
|
||||||
|
let rhs = self.codegen_expr(rhs)?;
|
||||||
|
match op {
|
||||||
|
UnaryOperator::Not => unimplemented!(),
|
||||||
|
UnaryOperator::Neg => Ok(BasicValueEnum::IntValue(
|
||||||
|
self.builder.build_int_neg(rhs.into_int_value(), "neg"),
|
||||||
|
)),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
Expr::BinaryOp { lhs, op, rhs } => {
|
||||||
|
let lhs = self.codegen_expr(lhs)?;
|
||||||
|
let rhs = self.codegen_expr(rhs)?;
|
||||||
|
match op {
|
||||||
|
BinaryOperator::Add => {
|
||||||
|
Ok(BasicValueEnum::IntValue(self.builder.build_int_add(
|
||||||
|
lhs.into_int_value(),
|
||||||
|
rhs.into_int_value(),
|
||||||
|
"add",
|
||||||
|
)))
|
||||||
|
}
|
||||||
|
BinaryOperator::Sub => {
|
||||||
|
Ok(BasicValueEnum::IntValue(self.builder.build_int_sub(
|
||||||
|
lhs.into_int_value(),
|
||||||
|
rhs.into_int_value(),
|
||||||
|
"add",
|
||||||
|
)))
|
||||||
|
}
|
||||||
|
BinaryOperator::Mul => {
|
||||||
|
Ok(BasicValueEnum::IntValue(self.builder.build_int_sub(
|
||||||
|
lhs.into_int_value(),
|
||||||
|
rhs.into_int_value(),
|
||||||
|
"add",
|
||||||
|
)))
|
||||||
|
}
|
||||||
|
BinaryOperator::Div => {
|
||||||
|
Ok(BasicValueEnum::IntValue(self.builder.build_int_signed_div(
|
||||||
|
lhs.into_int_value(),
|
||||||
|
rhs.into_int_value(),
|
||||||
|
"add",
|
||||||
|
)))
|
||||||
|
}
|
||||||
|
BinaryOperator::Pow => unimplemented!(),
|
||||||
|
BinaryOperator::Equ => {
|
||||||
|
Ok(BasicValueEnum::IntValue(self.builder.build_int_compare(
|
||||||
|
IntPredicate::EQ,
|
||||||
|
lhs.into_int_value(),
|
||||||
|
rhs.into_int_value(),
|
||||||
|
"eq",
|
||||||
|
)))
|
||||||
|
}
|
||||||
|
BinaryOperator::Neq => todo!(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
Expr::Let { bindings, body } => {
|
||||||
|
self.env.push();
|
||||||
|
for (id, val) in bindings {
|
||||||
|
let val = self.codegen_expr(val)?;
|
||||||
|
self.env.set(id, val);
|
||||||
|
}
|
||||||
|
let res = self.codegen_expr(body);
|
||||||
|
self.env.pop();
|
||||||
|
res
|
||||||
|
}
|
||||||
|
Expr::If {
|
||||||
|
condition,
|
||||||
|
then,
|
||||||
|
else_,
|
||||||
|
} => {
|
||||||
|
let then_block = self.append_basic_block("then");
|
||||||
|
let else_block = self.append_basic_block("else");
|
||||||
|
let join_block = self.append_basic_block("join");
|
||||||
|
let condition = self.codegen_expr(condition)?;
|
||||||
|
self.builder.build_conditional_branch(
|
||||||
|
condition.into_int_value(),
|
||||||
|
then_block,
|
||||||
|
else_block,
|
||||||
|
);
|
||||||
|
self.builder.position_at_end(then_block);
|
||||||
|
let then_res = self.codegen_expr(then)?;
|
||||||
|
self.builder.build_unconditional_branch(join_block);
|
||||||
|
|
||||||
|
self.builder.position_at_end(else_block);
|
||||||
|
let else_res = self.codegen_expr(else_)?;
|
||||||
|
self.builder.build_unconditional_branch(join_block);
|
||||||
|
|
||||||
|
self.builder.position_at_end(join_block);
|
||||||
|
let phi = self.builder.build_phi(self.context.i64_type(), "join");
|
||||||
|
phi.add_incoming(&[(&then_res, then_block), (&else_res, else_block)]);
|
||||||
|
Ok(phi.as_basic_value())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn codegen_decl(&mut self, decl: &'ast Decl<'ast>) -> Result<()> {
|
||||||
|
match decl {
|
||||||
|
Decl::Fun(Fun { name, args, body }) => {
|
||||||
|
let i64_type = self.context.i64_type();
|
||||||
|
self.new_function(
|
||||||
|
name.into(),
|
||||||
|
i64_type.fn_type(
|
||||||
|
args.iter()
|
||||||
|
.map(|_| i64_type.into())
|
||||||
|
.collect::<Vec<_>>()
|
||||||
|
.as_slice(),
|
||||||
|
false,
|
||||||
|
),
|
||||||
|
);
|
||||||
|
self.env.push();
|
||||||
|
for (i, arg) in args.iter().enumerate() {
|
||||||
|
self.env
|
||||||
|
.set(arg, self.function.unwrap().get_nth_param(i as u32).unwrap());
|
||||||
|
}
|
||||||
|
let res = self.codegen_expr(body)?;
|
||||||
|
self.env.pop();
|
||||||
|
self.finish_function(&res);
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn codegen_main(&mut self, expr: &'ast Expr<'ast>) -> Result<()> {
|
||||||
|
self.new_function("main", self.context.i64_type().fn_type(&[], false));
|
||||||
|
let res = self.codegen_expr(expr)?;
|
||||||
|
self.finish_function(&res);
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn print_to_file<P>(&self, path: P) -> Result<()>
|
||||||
|
where
|
||||||
|
P: AsRef<Path>,
|
||||||
|
{
|
||||||
|
Ok(self.module.print_to_file(path)?)
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn binary_to_file<P>(&self, path: P) -> Result<()>
|
||||||
|
where
|
||||||
|
P: AsRef<Path>,
|
||||||
|
{
|
||||||
|
if self.module.write_bitcode_to_path(path.as_ref()) {
|
||||||
|
Ok(())
|
||||||
|
} else {
|
||||||
|
Err(Error::LLVMError(
|
||||||
|
"Error writing bitcode to output path".to_owned(),
|
||||||
|
))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use inkwell::execution_engine::JitFunction;
|
||||||
|
use inkwell::OptimizationLevel;
|
||||||
|
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
fn jit_eval<T>(expr: &str) -> anyhow::Result<T> {
|
||||||
|
let expr = crate::parser::expr(expr).unwrap().1;
|
||||||
|
|
||||||
|
let context = Context::create();
|
||||||
|
let mut codegen = Codegen::new(&context, "test");
|
||||||
|
let execution_engine = codegen
|
||||||
|
.module
|
||||||
|
.create_jit_execution_engine(OptimizationLevel::None)
|
||||||
|
.unwrap();
|
||||||
|
|
||||||
|
codegen.new_function("test", context.i64_type().fn_type(&[], false));
|
||||||
|
let res = codegen.codegen_expr(&expr)?;
|
||||||
|
codegen.finish_function(&res);
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
let fun: JitFunction<unsafe extern "C" fn() -> T> =
|
||||||
|
execution_engine.get_function("test")?;
|
||||||
|
Ok(fun.call())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn add_literals() {
|
||||||
|
assert_eq!(jit_eval::<i64>("1 + 2").unwrap(), 3);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn variable_shadowing() {
|
||||||
|
assert_eq!(
|
||||||
|
jit_eval::<i64>("let x = 1 in (let x = 2 in x) + x").unwrap(),
|
||||||
|
3
|
||||||
|
);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn eq() {
|
||||||
|
assert_eq!(
|
||||||
|
jit_eval::<i64>("let x = 1 in if x == 1 then 2 else 4").unwrap(),
|
||||||
|
2
|
||||||
|
);
|
||||||
|
}
|
||||||
|
}
|
||||||
26
src/codegen/mod.rs
Normal file
26
src/codegen/mod.rs
Normal file
|
|
@ -0,0 +1,26 @@
|
||||||
|
pub mod llvm;
|
||||||
|
|
||||||
|
use inkwell::execution_engine::JitFunction;
|
||||||
|
use inkwell::OptimizationLevel;
|
||||||
|
pub use llvm::*;
|
||||||
|
|
||||||
|
use crate::ast::Expr;
|
||||||
|
use crate::common::Result;
|
||||||
|
|
||||||
|
pub fn jit_eval<T>(expr: &Expr) -> Result<T> {
|
||||||
|
let context = Context::create();
|
||||||
|
let mut codegen = Codegen::new(&context, "eval");
|
||||||
|
let execution_engine = codegen
|
||||||
|
.module
|
||||||
|
.create_jit_execution_engine(OptimizationLevel::None)
|
||||||
|
.map_err(Error::from)?;
|
||||||
|
codegen.new_function("eval", context.i64_type().fn_type(&[], false));
|
||||||
|
let res = codegen.codegen_expr(&expr)?;
|
||||||
|
codegen.finish_function(&res);
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
let fun: JitFunction<unsafe extern "C" fn() -> T> =
|
||||||
|
execution_engine.get_function("eval").unwrap();
|
||||||
|
Ok(fun.call())
|
||||||
|
}
|
||||||
|
}
|
||||||
28
src/commands/compile.rs
Normal file
28
src/commands/compile.rs
Normal file
|
|
@ -0,0 +1,28 @@
|
||||||
|
use std::path::PathBuf;
|
||||||
|
|
||||||
|
use clap::Clap;
|
||||||
|
|
||||||
|
use crate::common::Result;
|
||||||
|
use crate::compiler::{self, CompilerOptions};
|
||||||
|
|
||||||
|
#[derive(Clap)]
|
||||||
|
pub struct Compile {
|
||||||
|
file: PathBuf,
|
||||||
|
|
||||||
|
#[clap(short = 'o')]
|
||||||
|
out_file: PathBuf,
|
||||||
|
|
||||||
|
#[clap(flatten)]
|
||||||
|
options: CompilerOptions,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Compile {
|
||||||
|
pub fn run(self) -> Result<()> {
|
||||||
|
eprintln!(
|
||||||
|
">>> {} -> {}",
|
||||||
|
&self.file.to_string_lossy(),
|
||||||
|
self.out_file.to_string_lossy()
|
||||||
|
);
|
||||||
|
compiler::compile_file(&self.file, &self.out_file, &self.options)
|
||||||
|
}
|
||||||
|
}
|
||||||
30
src/commands/eval.rs
Normal file
30
src/commands/eval.rs
Normal file
|
|
@ -0,0 +1,30 @@
|
||||||
|
use clap::Clap;
|
||||||
|
|
||||||
|
use crate::codegen;
|
||||||
|
use crate::interpreter;
|
||||||
|
use crate::parser;
|
||||||
|
use crate::Result;
|
||||||
|
|
||||||
|
/// Evaluate an expression and print its result
|
||||||
|
#[derive(Clap)]
|
||||||
|
pub struct Eval {
|
||||||
|
/// JIT-compile with LLVM instead of interpreting
|
||||||
|
#[clap(long)]
|
||||||
|
jit: bool,
|
||||||
|
|
||||||
|
/// Expression to evaluate
|
||||||
|
expr: String,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Eval {
|
||||||
|
pub fn run(self) -> Result<()> {
|
||||||
|
let (_, parsed) = parser::expr(&self.expr)?;
|
||||||
|
let result = if self.jit {
|
||||||
|
codegen::jit_eval::<i64>(&parsed)?.into()
|
||||||
|
} else {
|
||||||
|
interpreter::eval(&parsed)?
|
||||||
|
};
|
||||||
|
println!("{}", result);
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
|
}
|
||||||
5
src/commands/mod.rs
Normal file
5
src/commands/mod.rs
Normal file
|
|
@ -0,0 +1,5 @@
|
||||||
|
pub mod compile;
|
||||||
|
pub mod eval;
|
||||||
|
|
||||||
|
pub use compile::Compile;
|
||||||
|
pub use eval::Eval;
|
||||||
40
src/common/env.rs
Normal file
40
src/common/env.rs
Normal file
|
|
@ -0,0 +1,40 @@
|
||||||
|
use std::collections::HashMap;
|
||||||
|
|
||||||
|
use crate::ast::Ident;
|
||||||
|
|
||||||
|
/// A lexical environment
|
||||||
|
#[derive(Debug, PartialEq, Eq)]
|
||||||
|
pub struct Env<'ast, V>(Vec<HashMap<&'ast Ident<'ast>, V>>);
|
||||||
|
|
||||||
|
impl<'ast, V> Default for Env<'ast, V> {
|
||||||
|
fn default() -> Self {
|
||||||
|
Self::new()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'ast, V> Env<'ast, V> {
|
||||||
|
pub fn new() -> Self {
|
||||||
|
Self(vec![Default::default()])
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn push(&mut self) {
|
||||||
|
self.0.push(Default::default());
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn pop(&mut self) {
|
||||||
|
self.0.pop();
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn set(&mut self, k: &'ast Ident<'ast>, v: V) {
|
||||||
|
self.0.last_mut().unwrap().insert(k, v);
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn resolve<'a>(&'a self, k: &'ast Ident<'ast>) -> Option<&'a V> {
|
||||||
|
for ctx in self.0.iter().rev() {
|
||||||
|
if let Some(res) = ctx.get(k) {
|
||||||
|
return Some(res);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
None
|
||||||
|
}
|
||||||
|
}
|
||||||
50
src/common/error.rs
Normal file
50
src/common/error.rs
Normal file
|
|
@ -0,0 +1,50 @@
|
||||||
|
use std::{io, result};
|
||||||
|
|
||||||
|
use thiserror::Error;
|
||||||
|
|
||||||
|
use crate::{codegen, interpreter, parser};
|
||||||
|
|
||||||
|
#[derive(Error, Debug)]
|
||||||
|
pub enum Error {
|
||||||
|
#[error(transparent)]
|
||||||
|
IOError(#[from] io::Error),
|
||||||
|
|
||||||
|
#[error("Error parsing input: {0}")]
|
||||||
|
ParseError(#[from] parser::Error),
|
||||||
|
|
||||||
|
#[error("Error evaluating expression: {0}")]
|
||||||
|
EvalError(#[from] interpreter::Error),
|
||||||
|
|
||||||
|
#[error("Compile error: {0}")]
|
||||||
|
CodegenError(#[from] codegen::Error),
|
||||||
|
|
||||||
|
#[error("{0}")]
|
||||||
|
Message(String),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl From<String> for Error {
|
||||||
|
fn from(s: String) -> Self {
|
||||||
|
Self::Message(s)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> From<nom::Err<nom::error::Error<&'a str>>> for Error {
|
||||||
|
fn from(e: nom::Err<nom::error::Error<&'a str>>) -> Self {
|
||||||
|
use nom::error::Error as NomError;
|
||||||
|
use nom::Err::*;
|
||||||
|
|
||||||
|
Self::ParseError(match e {
|
||||||
|
Incomplete(i) => Incomplete(i),
|
||||||
|
Error(NomError { input, code }) => Error(NomError {
|
||||||
|
input: input.to_owned(),
|
||||||
|
code,
|
||||||
|
}),
|
||||||
|
Failure(NomError { input, code }) => Failure(NomError {
|
||||||
|
input: input.to_owned(),
|
||||||
|
code,
|
||||||
|
}),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub type Result<T> = result::Result<T, Error>;
|
||||||
4
src/common/mod.rs
Normal file
4
src/common/mod.rs
Normal file
|
|
@ -0,0 +1,4 @@
|
||||||
|
pub(crate) mod env;
|
||||||
|
pub(crate) mod error;
|
||||||
|
|
||||||
|
pub use error::{Error, Result};
|
||||||
84
src/compiler.rs
Normal file
84
src/compiler.rs
Normal file
|
|
@ -0,0 +1,84 @@
|
||||||
|
use std::fmt::{self, Display};
|
||||||
|
use std::path::Path;
|
||||||
|
use std::str::FromStr;
|
||||||
|
use std::{fs, result};
|
||||||
|
|
||||||
|
use clap::Clap;
|
||||||
|
use test_strategy::Arbitrary;
|
||||||
|
|
||||||
|
use crate::codegen::{self, Codegen};
|
||||||
|
use crate::common::Result;
|
||||||
|
use crate::parser;
|
||||||
|
|
||||||
|
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Arbitrary)]
|
||||||
|
pub enum OutputFormat {
|
||||||
|
LLVM,
|
||||||
|
Bitcode,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Default for OutputFormat {
|
||||||
|
fn default() -> Self {
|
||||||
|
Self::Bitcode
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl FromStr for OutputFormat {
|
||||||
|
type Err = String;
|
||||||
|
|
||||||
|
fn from_str(s: &str) -> result::Result<Self, Self::Err> {
|
||||||
|
match s {
|
||||||
|
"llvm" => Ok(Self::LLVM),
|
||||||
|
"binary" => Ok(Self::Bitcode),
|
||||||
|
_ => Err(format!(
|
||||||
|
"Invalid output format {}, expected one of {{llvm, binary}}",
|
||||||
|
s
|
||||||
|
)),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Display for OutputFormat {
|
||||||
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||||
|
match self {
|
||||||
|
OutputFormat::LLVM => f.write_str("llvm"),
|
||||||
|
OutputFormat::Bitcode => f.write_str("binary"),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clap, Debug, PartialEq, Eq, Default)]
|
||||||
|
pub struct CompilerOptions {
|
||||||
|
#[clap(long, short = 'f', default_value)]
|
||||||
|
format: OutputFormat,
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn compile_file(input: &Path, output: &Path, options: &CompilerOptions) -> Result<()> {
|
||||||
|
let src = fs::read_to_string(input)?;
|
||||||
|
let (_, decls) = parser::toplevel(&src)?; // TODO: statements
|
||||||
|
let context = codegen::Context::create();
|
||||||
|
let mut codegen = Codegen::new(
|
||||||
|
&context,
|
||||||
|
&input
|
||||||
|
.file_stem()
|
||||||
|
.map_or("UNKNOWN".to_owned(), |s| s.to_string_lossy().into_owned()),
|
||||||
|
);
|
||||||
|
for decl in &decls {
|
||||||
|
codegen.codegen_decl(decl)?;
|
||||||
|
}
|
||||||
|
match options.format {
|
||||||
|
OutputFormat::LLVM => codegen.print_to_file(output)?,
|
||||||
|
OutputFormat::Bitcode => codegen.binary_to_file(output)?,
|
||||||
|
}
|
||||||
|
Ok(())
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use super::*;
|
||||||
|
use test_strategy::proptest;
|
||||||
|
|
||||||
|
#[proptest]
|
||||||
|
fn output_format_display_from_str_round_trip(of: OutputFormat) {
|
||||||
|
assert_eq!(OutputFormat::from_str(&of.to_string()), Ok(of));
|
||||||
|
}
|
||||||
|
}
|
||||||
16
src/interpreter/error.rs
Normal file
16
src/interpreter/error.rs
Normal file
|
|
@ -0,0 +1,16 @@
|
||||||
|
use std::result;
|
||||||
|
|
||||||
|
use thiserror::Error;
|
||||||
|
|
||||||
|
use crate::ast::{Ident, Type};
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Eq, Error)]
|
||||||
|
pub enum Error {
|
||||||
|
#[error("Undefined variable {0}")]
|
||||||
|
UndefinedVariable(Ident<'static>),
|
||||||
|
|
||||||
|
#[error("Unexpected type {actual}, expected type {expected}")]
|
||||||
|
InvalidType { actual: Type, expected: Type },
|
||||||
|
}
|
||||||
|
|
||||||
|
pub type Result<T> = result::Result<T, Error>;
|
||||||
125
src/interpreter/mod.rs
Normal file
125
src/interpreter/mod.rs
Normal file
|
|
@ -0,0 +1,125 @@
|
||||||
|
mod error;
|
||||||
|
mod value;
|
||||||
|
|
||||||
|
pub use self::error::{Error, Result};
|
||||||
|
pub use self::value::Value;
|
||||||
|
use crate::ast::{BinaryOperator, Expr, Ident, Literal, UnaryOperator};
|
||||||
|
use crate::common::env::Env;
|
||||||
|
|
||||||
|
#[derive(Debug, Default)]
|
||||||
|
pub struct Interpreter<'a> {
|
||||||
|
env: Env<'a, Value>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<'a> Interpreter<'a> {
|
||||||
|
pub fn new() -> Self {
|
||||||
|
Self::default()
|
||||||
|
}
|
||||||
|
|
||||||
|
fn resolve(&self, var: &'a Ident<'a>) -> Result<Value> {
|
||||||
|
self.env
|
||||||
|
.resolve(var)
|
||||||
|
.cloned()
|
||||||
|
.ok_or_else(|| Error::UndefinedVariable(var.to_owned()))
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn eval(&mut self, expr: &'a Expr<'a>) -> Result<Value> {
|
||||||
|
match expr {
|
||||||
|
Expr::Ident(id) => self.resolve(id),
|
||||||
|
Expr::Literal(Literal::Int(i)) => Ok((*i).into()),
|
||||||
|
Expr::UnaryOp { op, rhs } => {
|
||||||
|
let rhs = self.eval(rhs)?;
|
||||||
|
match op {
|
||||||
|
UnaryOperator::Neg => -rhs,
|
||||||
|
_ => unimplemented!(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
Expr::BinaryOp { lhs, op, rhs } => {
|
||||||
|
let lhs = self.eval(lhs)?;
|
||||||
|
let rhs = self.eval(rhs)?;
|
||||||
|
match op {
|
||||||
|
BinaryOperator::Add => lhs + rhs,
|
||||||
|
BinaryOperator::Sub => lhs - rhs,
|
||||||
|
BinaryOperator::Mul => lhs * rhs,
|
||||||
|
BinaryOperator::Div => lhs / rhs,
|
||||||
|
BinaryOperator::Pow => todo!(),
|
||||||
|
BinaryOperator::Equ => Ok(lhs.eq(&rhs).into()),
|
||||||
|
BinaryOperator::Neq => todo!(),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
Expr::Let { bindings, body } => {
|
||||||
|
self.env.push();
|
||||||
|
for (id, val) in bindings {
|
||||||
|
let val = self.eval(val)?;
|
||||||
|
self.env.set(id, val);
|
||||||
|
}
|
||||||
|
let res = self.eval(body)?;
|
||||||
|
self.env.pop();
|
||||||
|
Ok(res)
|
||||||
|
}
|
||||||
|
Expr::If {
|
||||||
|
condition,
|
||||||
|
then,
|
||||||
|
else_,
|
||||||
|
} => {
|
||||||
|
let condition = self.eval(condition)?;
|
||||||
|
if *(condition.into_type::<bool>()?) {
|
||||||
|
self.eval(then)
|
||||||
|
} else {
|
||||||
|
self.eval(else_)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn eval<'a>(expr: &'a Expr<'a>) -> Result<Value> {
|
||||||
|
let mut interpreter = Interpreter::new();
|
||||||
|
interpreter.eval(expr)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use std::convert::TryFrom;
|
||||||
|
|
||||||
|
use super::value::{TypeOf, Val};
|
||||||
|
use super::*;
|
||||||
|
use BinaryOperator::*;
|
||||||
|
|
||||||
|
fn int_lit(i: u64) -> Box<Expr<'static>> {
|
||||||
|
Box::new(Expr::Literal(Literal::Int(i)))
|
||||||
|
}
|
||||||
|
|
||||||
|
fn parse_eval<T>(src: &str) -> T
|
||||||
|
where
|
||||||
|
for<'a> &'a T: TryFrom<&'a Val>,
|
||||||
|
T: Clone + TypeOf,
|
||||||
|
{
|
||||||
|
let expr = crate::parser::expr(src).unwrap().1;
|
||||||
|
let res = eval(&expr).unwrap();
|
||||||
|
res.into_type::<T>().unwrap().clone()
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn simple_addition() {
|
||||||
|
let expr = Expr::BinaryOp {
|
||||||
|
lhs: int_lit(1),
|
||||||
|
op: Mul,
|
||||||
|
rhs: int_lit(2),
|
||||||
|
};
|
||||||
|
let res = eval(&expr).unwrap();
|
||||||
|
assert_eq!(*res.into_type::<i64>().unwrap(), 2);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn variable_shadowing() {
|
||||||
|
let res = parse_eval::<i64>("let x = 1 in (let x = 2 in x) + x");
|
||||||
|
assert_eq!(res, 3);
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn conditional_with_equals() {
|
||||||
|
let res = parse_eval::<i64>("let x = 1 in if x == 1 then 2 else 4");
|
||||||
|
assert_eq!(res, 2);
|
||||||
|
}
|
||||||
|
}
|
||||||
134
src/interpreter/value.rs
Normal file
134
src/interpreter/value.rs
Normal file
|
|
@ -0,0 +1,134 @@
|
||||||
|
use std::convert::TryFrom;
|
||||||
|
use std::fmt::{self, Display};
|
||||||
|
use std::ops::{Add, Div, Mul, Neg, Sub};
|
||||||
|
use std::rc::Rc;
|
||||||
|
|
||||||
|
use derive_more::{Deref, From, TryInto};
|
||||||
|
|
||||||
|
use super::{Error, Result};
|
||||||
|
use crate::ast::Type;
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, From, TryInto)]
|
||||||
|
#[try_into(owned, ref)]
|
||||||
|
pub enum Val {
|
||||||
|
Int(i64),
|
||||||
|
Float(f64),
|
||||||
|
Bool(bool),
|
||||||
|
}
|
||||||
|
|
||||||
|
impl From<u64> for Val {
|
||||||
|
fn from(i: u64) -> Self {
|
||||||
|
Self::from(i as i64)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Display for Val {
|
||||||
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||||
|
match self {
|
||||||
|
Val::Int(x) => x.fmt(f),
|
||||||
|
Val::Float(x) => x.fmt(f),
|
||||||
|
Val::Bool(x) => x.fmt(f),
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Val {
|
||||||
|
pub fn type_(&self) -> Type {
|
||||||
|
match self {
|
||||||
|
Val::Int(_) => Type::Int,
|
||||||
|
Val::Float(_) => Type::Float,
|
||||||
|
Val::Bool(_) => Type::Bool,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn into_type<'a, T>(&'a self) -> Result<&'a T>
|
||||||
|
where
|
||||||
|
T: TypeOf + 'a + Clone,
|
||||||
|
&'a T: TryFrom<&'a Self>,
|
||||||
|
{
|
||||||
|
<&T>::try_from(self).map_err(|_| Error::InvalidType {
|
||||||
|
actual: self.type_(),
|
||||||
|
expected: <T as TypeOf>::type_of(),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug, PartialEq, Clone, Deref)]
|
||||||
|
pub struct Value(Rc<Val>);
|
||||||
|
|
||||||
|
impl Display for Value {
|
||||||
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
||||||
|
self.0.fmt(f)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl<T> From<T> for Value
|
||||||
|
where
|
||||||
|
Val: From<T>,
|
||||||
|
{
|
||||||
|
fn from(x: T) -> Self {
|
||||||
|
Self(Rc::new(x.into()))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Neg for Value {
|
||||||
|
type Output = Result<Value>;
|
||||||
|
|
||||||
|
fn neg(self) -> Self::Output {
|
||||||
|
Ok((-self.into_type::<i64>()?).into())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Add for Value {
|
||||||
|
type Output = Result<Value>;
|
||||||
|
|
||||||
|
fn add(self, rhs: Self) -> Self::Output {
|
||||||
|
Ok((self.into_type::<i64>()? + rhs.into_type::<i64>()?).into())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Sub for Value {
|
||||||
|
type Output = Result<Value>;
|
||||||
|
|
||||||
|
fn sub(self, rhs: Self) -> Self::Output {
|
||||||
|
Ok((self.into_type::<i64>()? - rhs.into_type::<i64>()?).into())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Mul for Value {
|
||||||
|
type Output = Result<Value>;
|
||||||
|
|
||||||
|
fn mul(self, rhs: Self) -> Self::Output {
|
||||||
|
Ok((self.into_type::<i64>()? * rhs.into_type::<i64>()?).into())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl Div for Value {
|
||||||
|
type Output = Result<Value>;
|
||||||
|
|
||||||
|
fn div(self, rhs: Self) -> Self::Output {
|
||||||
|
Ok((self.into_type::<f64>()? / rhs.into_type::<f64>()?).into())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub trait TypeOf {
|
||||||
|
fn type_of() -> Type;
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TypeOf for i64 {
|
||||||
|
fn type_of() -> Type {
|
||||||
|
Type::Int
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TypeOf for bool {
|
||||||
|
fn type_of() -> Type {
|
||||||
|
Type::Bool
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
impl TypeOf for f64 {
|
||||||
|
fn type_of() -> Type {
|
||||||
|
Type::Float
|
||||||
|
}
|
||||||
|
}
|
||||||
31
src/main.rs
Normal file
31
src/main.rs
Normal file
|
|
@ -0,0 +1,31 @@
|
||||||
|
use clap::Clap;
|
||||||
|
|
||||||
|
pub mod ast;
|
||||||
|
pub mod codegen;
|
||||||
|
pub(crate) mod commands;
|
||||||
|
pub(crate) mod common;
|
||||||
|
pub mod compiler;
|
||||||
|
pub mod interpreter;
|
||||||
|
pub mod parser;
|
||||||
|
|
||||||
|
pub use common::{Error, Result};
|
||||||
|
|
||||||
|
#[derive(Clap)]
|
||||||
|
struct Opts {
|
||||||
|
#[clap(subcommand)]
|
||||||
|
subcommand: Command,
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Clap)]
|
||||||
|
enum Command {
|
||||||
|
Eval(commands::Eval),
|
||||||
|
Compile(commands::Compile),
|
||||||
|
}
|
||||||
|
|
||||||
|
fn main() -> anyhow::Result<()> {
|
||||||
|
let opts = Opts::parse();
|
||||||
|
match opts.subcommand {
|
||||||
|
Command::Eval(eval) => Ok(eval.run()?),
|
||||||
|
Command::Compile(compile) => Ok(compile.run()?),
|
||||||
|
}
|
||||||
|
}
|
||||||
445
src/parser/mod.rs
Normal file
445
src/parser/mod.rs
Normal file
|
|
@ -0,0 +1,445 @@
|
||||||
|
use nom::character::complete::{digit1, multispace0, multispace1};
|
||||||
|
use nom::error::{ErrorKind, ParseError};
|
||||||
|
use nom::{
|
||||||
|
alt, char, complete, delimited, do_parse, flat_map, many0, map, named, parse_to,
|
||||||
|
separated_list0, separated_list1, tag, tuple,
|
||||||
|
};
|
||||||
|
use pratt::{Affix, Associativity, PrattParser, Precedence};
|
||||||
|
|
||||||
|
use crate::ast::{BinaryOperator, Decl, Expr, Fun, Ident, Literal, UnaryOperator};
|
||||||
|
|
||||||
|
pub type Error = nom::Err<nom::error::Error<String>>;
|
||||||
|
|
||||||
|
#[derive(Debug)]
|
||||||
|
enum TokenTree<'a> {
|
||||||
|
Prefix(UnaryOperator),
|
||||||
|
// Postfix(char),
|
||||||
|
Infix(BinaryOperator),
|
||||||
|
Primary(Expr<'a>),
|
||||||
|
Group(Vec<TokenTree<'a>>),
|
||||||
|
}
|
||||||
|
|
||||||
|
named!(prefix(&str) -> TokenTree, map!(alt!(
|
||||||
|
complete!(char!('-')) => { |_| UnaryOperator::Neg } |
|
||||||
|
complete!(char!('!')) => { |_| UnaryOperator::Not }
|
||||||
|
), TokenTree::Prefix));
|
||||||
|
|
||||||
|
named!(infix(&str) -> TokenTree, map!(alt!(
|
||||||
|
complete!(tag!("==")) => { |_| BinaryOperator::Equ } |
|
||||||
|
complete!(tag!("!=")) => { |_| BinaryOperator::Neq } |
|
||||||
|
complete!(char!('+')) => { |_| BinaryOperator::Add } |
|
||||||
|
complete!(char!('-')) => { |_| BinaryOperator::Sub } |
|
||||||
|
complete!(char!('*')) => { |_| BinaryOperator::Mul } |
|
||||||
|
complete!(char!('/')) => { |_| BinaryOperator::Div } |
|
||||||
|
complete!(char!('^')) => { |_| BinaryOperator::Pow }
|
||||||
|
), TokenTree::Infix));
|
||||||
|
|
||||||
|
named!(primary(&str) -> TokenTree, alt!(
|
||||||
|
do_parse!(
|
||||||
|
multispace0 >>
|
||||||
|
char!('(') >>
|
||||||
|
multispace0 >>
|
||||||
|
group: group >>
|
||||||
|
multispace0 >>
|
||||||
|
char!(')') >>
|
||||||
|
multispace0 >>
|
||||||
|
(TokenTree::Group(group))
|
||||||
|
) |
|
||||||
|
delimited!(multispace0, simple_expr, multispace0) => { |s| TokenTree::Primary(s) }
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(
|
||||||
|
rest(&str) -> Vec<(TokenTree, Vec<TokenTree>, TokenTree)>,
|
||||||
|
many0!(tuple!(
|
||||||
|
infix,
|
||||||
|
delimited!(multispace0, many0!(prefix), multispace0),
|
||||||
|
primary
|
||||||
|
// many0!(postfix)
|
||||||
|
))
|
||||||
|
);
|
||||||
|
|
||||||
|
named!(group(&str) -> Vec<TokenTree>, do_parse!(
|
||||||
|
prefix: many0!(prefix)
|
||||||
|
>> primary: primary
|
||||||
|
// >> postfix: many0!(postfix)
|
||||||
|
>> rest: rest
|
||||||
|
>> ({
|
||||||
|
let mut res = prefix;
|
||||||
|
res.push(primary);
|
||||||
|
// res.append(&mut postfix);
|
||||||
|
for (infix, mut prefix, primary/*, mut postfix*/) in rest {
|
||||||
|
res.push(infix);
|
||||||
|
res.append(&mut prefix);
|
||||||
|
res.push(primary);
|
||||||
|
// res.append(&mut postfix);
|
||||||
|
}
|
||||||
|
res
|
||||||
|
})
|
||||||
|
));
|
||||||
|
|
||||||
|
fn token_tree(i: &str) -> nom::IResult<&str, Vec<TokenTree>> {
|
||||||
|
group(i)
|
||||||
|
}
|
||||||
|
|
||||||
|
struct ExprParser;
|
||||||
|
|
||||||
|
impl<'a, I> PrattParser<I> for ExprParser
|
||||||
|
where
|
||||||
|
I: Iterator<Item = TokenTree<'a>>,
|
||||||
|
{
|
||||||
|
type Error = pratt::NoError;
|
||||||
|
type Input = TokenTree<'a>;
|
||||||
|
type Output = Expr<'a>;
|
||||||
|
|
||||||
|
fn query(&mut self, input: &Self::Input) -> Result<Affix, Self::Error> {
|
||||||
|
use BinaryOperator::*;
|
||||||
|
use UnaryOperator::*;
|
||||||
|
|
||||||
|
Ok(match input {
|
||||||
|
TokenTree::Infix(Add) => Affix::Infix(Precedence(6), Associativity::Left),
|
||||||
|
TokenTree::Infix(Sub) => Affix::Infix(Precedence(6), Associativity::Left),
|
||||||
|
TokenTree::Infix(Mul) => Affix::Infix(Precedence(7), Associativity::Left),
|
||||||
|
TokenTree::Infix(Div) => Affix::Infix(Precedence(7), Associativity::Left),
|
||||||
|
TokenTree::Infix(Pow) => Affix::Infix(Precedence(8), Associativity::Right),
|
||||||
|
TokenTree::Infix(Equ) => Affix::Infix(Precedence(4), Associativity::Right),
|
||||||
|
TokenTree::Infix(Neq) => Affix::Infix(Precedence(4), Associativity::Right),
|
||||||
|
TokenTree::Prefix(Neg) => Affix::Prefix(Precedence(6)),
|
||||||
|
TokenTree::Prefix(Not) => Affix::Prefix(Precedence(6)),
|
||||||
|
TokenTree::Primary(_) => Affix::Nilfix,
|
||||||
|
TokenTree::Group(_) => Affix::Nilfix,
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn primary(&mut self, input: Self::Input) -> Result<Self::Output, Self::Error> {
|
||||||
|
Ok(match input {
|
||||||
|
TokenTree::Primary(expr) => expr,
|
||||||
|
TokenTree::Group(group) => self.parse(&mut group.into_iter()).unwrap(),
|
||||||
|
_ => unreachable!(),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn infix(
|
||||||
|
&mut self,
|
||||||
|
lhs: Self::Output,
|
||||||
|
op: Self::Input,
|
||||||
|
rhs: Self::Output,
|
||||||
|
) -> Result<Self::Output, Self::Error> {
|
||||||
|
let op = match op {
|
||||||
|
TokenTree::Infix(op) => op,
|
||||||
|
_ => unreachable!(),
|
||||||
|
};
|
||||||
|
Ok(Expr::BinaryOp {
|
||||||
|
lhs: Box::new(lhs),
|
||||||
|
op,
|
||||||
|
rhs: Box::new(rhs),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn prefix(&mut self, op: Self::Input, rhs: Self::Output) -> Result<Self::Output, Self::Error> {
|
||||||
|
let op = match op {
|
||||||
|
TokenTree::Prefix(op) => op,
|
||||||
|
_ => unreachable!(),
|
||||||
|
};
|
||||||
|
|
||||||
|
Ok(Expr::UnaryOp {
|
||||||
|
op,
|
||||||
|
rhs: Box::new(rhs),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
|
||||||
|
fn postfix(
|
||||||
|
&mut self,
|
||||||
|
_lhs: Self::Output,
|
||||||
|
_op: Self::Input,
|
||||||
|
) -> Result<Self::Output, Self::Error> {
|
||||||
|
unreachable!()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn ident<'a, E>(i: &'a str) -> nom::IResult<&'a str, Ident, E>
|
||||||
|
where
|
||||||
|
E: ParseError<&'a str>,
|
||||||
|
{
|
||||||
|
let mut chars = i.chars();
|
||||||
|
if let Some(f) = chars.next() {
|
||||||
|
if f.is_alphabetic() || f == '_' {
|
||||||
|
let mut idx = 1;
|
||||||
|
for c in chars {
|
||||||
|
if !(c.is_alphanumeric() || c == '_') {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
idx += 1;
|
||||||
|
}
|
||||||
|
Ok((&i[idx..], Ident::from_str_unchecked(&i[..idx])))
|
||||||
|
} else {
|
||||||
|
Err(nom::Err::Error(E::from_error_kind(i, ErrorKind::Satisfy)))
|
||||||
|
}
|
||||||
|
} else {
|
||||||
|
Err(nom::Err::Error(E::from_error_kind(i, ErrorKind::Eof)))
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
named!(int(&str) -> Literal, map!(flat_map!(digit1, parse_to!(u64)), Literal::Int));
|
||||||
|
|
||||||
|
named!(literal(&str) -> Expr, map!(alt!(int), Expr::Literal));
|
||||||
|
|
||||||
|
named!(binding(&str) -> (Ident, Expr), do_parse!(
|
||||||
|
multispace0
|
||||||
|
>> ident: ident
|
||||||
|
>> multispace0
|
||||||
|
>> char!('=')
|
||||||
|
>> multispace0
|
||||||
|
>> expr: expr
|
||||||
|
>> (ident, expr)
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(let_(&str) -> Expr, do_parse!(
|
||||||
|
tag!("let")
|
||||||
|
>> multispace0
|
||||||
|
>> bindings: separated_list1!(alt!(char!(';') | char!('\n')), binding)
|
||||||
|
>> multispace0
|
||||||
|
>> tag!("in")
|
||||||
|
>> multispace0
|
||||||
|
>> body: expr
|
||||||
|
>> (Expr::Let {
|
||||||
|
bindings,
|
||||||
|
body: Box::new(body)
|
||||||
|
})
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(if_(&str) -> Expr, do_parse! (
|
||||||
|
tag!("if")
|
||||||
|
>> multispace0
|
||||||
|
>> condition: expr
|
||||||
|
>> multispace0
|
||||||
|
>> tag!("then")
|
||||||
|
>> multispace0
|
||||||
|
>> then: expr
|
||||||
|
>> multispace0
|
||||||
|
>> tag!("else")
|
||||||
|
>> multispace0
|
||||||
|
>> else_: expr
|
||||||
|
>> (Expr::If {
|
||||||
|
condition: Box::new(condition),
|
||||||
|
then: Box::new(then),
|
||||||
|
else_: Box::new(else_)
|
||||||
|
})
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(ident_expr(&str) -> Expr, map!(ident, Expr::Ident));
|
||||||
|
|
||||||
|
named!(simple_expr(&str) -> Expr, alt!(
|
||||||
|
let_ |
|
||||||
|
if_ |
|
||||||
|
literal |
|
||||||
|
ident_expr
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(pub expr(&str) -> Expr, alt!(
|
||||||
|
map!(token_tree, |tt| {
|
||||||
|
ExprParser.parse(&mut tt.into_iter()).unwrap()
|
||||||
|
}) |
|
||||||
|
simple_expr));
|
||||||
|
|
||||||
|
//////
|
||||||
|
|
||||||
|
named!(fun(&str) -> Fun, do_parse!(
|
||||||
|
tag!("fn")
|
||||||
|
>> multispace0
|
||||||
|
>> name: ident
|
||||||
|
>> multispace1
|
||||||
|
>> args: separated_list0!(multispace1, ident)
|
||||||
|
>> multispace0
|
||||||
|
>> char!('=')
|
||||||
|
>> multispace0
|
||||||
|
>> body: expr
|
||||||
|
>> (Fun {
|
||||||
|
name,
|
||||||
|
args,
|
||||||
|
body
|
||||||
|
})
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(pub decl(&str) -> Decl, alt!(
|
||||||
|
fun => { |f| Decl::Fun(f) }
|
||||||
|
));
|
||||||
|
|
||||||
|
named!(pub toplevel(&str) -> Vec<Decl>, separated_list0!(multispace1, decl));
|
||||||
|
|
||||||
|
#[cfg(test)]
|
||||||
|
mod tests {
|
||||||
|
use std::convert::{TryFrom, TryInto};
|
||||||
|
|
||||||
|
use super::*;
|
||||||
|
use BinaryOperator::*;
|
||||||
|
use Expr::{BinaryOp, If, Let, UnaryOp};
|
||||||
|
use UnaryOperator::*;
|
||||||
|
|
||||||
|
fn ident_expr(s: &str) -> Box<Expr> {
|
||||||
|
Box::new(Expr::Ident(Ident::try_from(s).unwrap()))
|
||||||
|
}
|
||||||
|
|
||||||
|
macro_rules! test_parse {
|
||||||
|
($parser: ident, $src: expr) => {{
|
||||||
|
let (rem, res) = $parser($src).unwrap();
|
||||||
|
assert!(
|
||||||
|
rem.is_empty(),
|
||||||
|
"non-empty remainder: \"{}\", parsed: {:?}",
|
||||||
|
rem,
|
||||||
|
res
|
||||||
|
);
|
||||||
|
res
|
||||||
|
}};
|
||||||
|
}
|
||||||
|
|
||||||
|
mod operators {
|
||||||
|
use super::*;
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn mul_plus() {
|
||||||
|
let (rem, res) = expr("x*y+z").unwrap();
|
||||||
|
assert!(rem.is_empty());
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
BinaryOp {
|
||||||
|
lhs: Box::new(BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Mul,
|
||||||
|
rhs: ident_expr("y")
|
||||||
|
}),
|
||||||
|
op: Add,
|
||||||
|
rhs: ident_expr("z")
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn mul_plus_ws() {
|
||||||
|
let (rem, res) = expr("x * y + z").unwrap();
|
||||||
|
assert!(rem.is_empty(), "non-empty remainder: \"{}\"", rem);
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
BinaryOp {
|
||||||
|
lhs: Box::new(BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Mul,
|
||||||
|
rhs: ident_expr("y")
|
||||||
|
}),
|
||||||
|
op: Add,
|
||||||
|
rhs: ident_expr("z")
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn unary() {
|
||||||
|
let (rem, res) = expr("x * -z").unwrap();
|
||||||
|
assert!(rem.is_empty(), "non-empty remainder: \"{}\"", rem);
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Mul,
|
||||||
|
rhs: Box::new(UnaryOp {
|
||||||
|
op: Neg,
|
||||||
|
rhs: ident_expr("z"),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn mul_literal() {
|
||||||
|
let (rem, res) = expr("x * 3").unwrap();
|
||||||
|
assert!(rem.is_empty());
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Mul,
|
||||||
|
rhs: Box::new(Expr::Literal(Literal::Int(3))),
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn equ() {
|
||||||
|
let res = test_parse!(expr, "x * 7 == 7");
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
BinaryOp {
|
||||||
|
lhs: Box::new(BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Mul,
|
||||||
|
rhs: Box::new(Expr::Literal(Literal::Int(7)))
|
||||||
|
}),
|
||||||
|
op: Equ,
|
||||||
|
rhs: Box::new(Expr::Literal(Literal::Int(7)))
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn let_complex() {
|
||||||
|
let res = test_parse!(expr, "let x = 1; y = x * 7 in (x + y) * 4");
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
Let {
|
||||||
|
bindings: vec![
|
||||||
|
(
|
||||||
|
Ident::try_from("x").unwrap(),
|
||||||
|
Expr::Literal(Literal::Int(1))
|
||||||
|
),
|
||||||
|
(
|
||||||
|
Ident::try_from("y").unwrap(),
|
||||||
|
Expr::BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Mul,
|
||||||
|
rhs: Box::new(Expr::Literal(Literal::Int(7)))
|
||||||
|
}
|
||||||
|
)
|
||||||
|
],
|
||||||
|
body: Box::new(Expr::BinaryOp {
|
||||||
|
lhs: Box::new(Expr::BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Add,
|
||||||
|
rhs: ident_expr("y"),
|
||||||
|
}),
|
||||||
|
op: Mul,
|
||||||
|
rhs: Box::new(Expr::Literal(Literal::Int(4))),
|
||||||
|
})
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn if_simple() {
|
||||||
|
let res = test_parse!(expr, "if x == 8 then 9 else 20");
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
If {
|
||||||
|
condition: Box::new(BinaryOp {
|
||||||
|
lhs: ident_expr("x"),
|
||||||
|
op: Equ,
|
||||||
|
rhs: Box::new(Expr::Literal(Literal::Int(8))),
|
||||||
|
}),
|
||||||
|
then: Box::new(Expr::Literal(Literal::Int(9))),
|
||||||
|
else_: Box::new(Expr::Literal(Literal::Int(20)))
|
||||||
|
}
|
||||||
|
)
|
||||||
|
}
|
||||||
|
|
||||||
|
#[test]
|
||||||
|
fn fn_decl() {
|
||||||
|
let res = test_parse!(decl, "fn id x = x");
|
||||||
|
assert_eq!(
|
||||||
|
res,
|
||||||
|
Decl::Fun(Fun {
|
||||||
|
name: "id".try_into().unwrap(),
|
||||||
|
args: vec!["x".try_into().unwrap()],
|
||||||
|
body: *ident_expr("x"),
|
||||||
|
})
|
||||||
|
)
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
Add table
Add a link
Reference in a new issue