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							|  | @ -0,0 +1,696 @@ | |||
| //
 | ||||
| // Copyright 2017 The Abseil Authors.
 | ||||
| //
 | ||||
| // Licensed under the Apache License, Version 2.0 (the "License");
 | ||||
| // you may not use this file except in compliance with the License.
 | ||||
| // You may obtain a copy of the License at
 | ||||
| //
 | ||||
| //      https://www.apache.org/licenses/LICENSE-2.0
 | ||||
| //
 | ||||
| // Unless required by applicable law or agreed to in writing, software
 | ||||
| // distributed under the License is distributed on an "AS IS" BASIS,
 | ||||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 | ||||
| // See the License for the specific language governing permissions and
 | ||||
| // limitations under the License.
 | ||||
| //
 | ||||
| // -----------------------------------------------------------------------------
 | ||||
| // File: substitute.h
 | ||||
| // -----------------------------------------------------------------------------
 | ||||
| //
 | ||||
| // This package contains functions for efficiently performing string
 | ||||
| // substitutions using a format string with positional notation:
 | ||||
| // `Substitute()` and `SubstituteAndAppend()`.
 | ||||
| //
 | ||||
| // Unlike printf-style format specifiers, `Substitute()` functions do not need
 | ||||
| // to specify the type of the substitution arguments. Supported arguments
 | ||||
| // following the format string, such as strings, string_views, ints,
 | ||||
| // floats, and bools, are automatically converted to strings during the
 | ||||
| // substitution process. (See below for a full list of supported types.)
 | ||||
| //
 | ||||
| // `Substitute()` does not allow you to specify *how* to format a value, beyond
 | ||||
| // the default conversion to string. For example, you cannot format an integer
 | ||||
| // in hex.
 | ||||
| //
 | ||||
| // The format string uses positional identifiers indicated by a dollar sign ($)
 | ||||
| // and single digit positional ids to indicate which substitution arguments to
 | ||||
| // use at that location within the format string.
 | ||||
| //
 | ||||
| // A '$$' sequence in the format string causes a literal '$' character to be
 | ||||
| // output.
 | ||||
| //
 | ||||
| // Example 1:
 | ||||
| //   std::string s = Substitute("$1 purchased $0 $2 for $$10. Thanks $1!",
 | ||||
| //                              5, "Bob", "Apples");
 | ||||
| //   EXPECT_EQ("Bob purchased 5 Apples for $10. Thanks Bob!", s);
 | ||||
| //
 | ||||
| // Example 2:
 | ||||
| //   std::string s = "Hi. ";
 | ||||
| //   SubstituteAndAppend(&s, "My name is $0 and I am $1 years old.", "Bob", 5);
 | ||||
| //   EXPECT_EQ("Hi. My name is Bob and I am 5 years old.", s);
 | ||||
| //
 | ||||
| // Supported types:
 | ||||
| //   * absl::string_view, std::string, const char* (null is equivalent to "")
 | ||||
| //   * int32_t, int64_t, uint32_t, uint64_t
 | ||||
| //   * float, double
 | ||||
| //   * bool (Printed as "true" or "false")
 | ||||
| //   * pointer types other than char* (Printed as "0x<lower case hex string>",
 | ||||
| //     except that null is printed as "NULL")
 | ||||
| //
 | ||||
| // If an invalid format string is provided, Substitute returns an empty string
 | ||||
| // and SubstituteAndAppend does not change the provided output string.
 | ||||
| // A format string is invalid if it:
 | ||||
| //   * ends in an unescaped $ character,
 | ||||
| //     e.g. "Hello $", or
 | ||||
| //   * calls for a position argument which is not provided,
 | ||||
| //     e.g. Substitute("Hello $2", "world"), or
 | ||||
| //   * specifies a non-digit, non-$ character after an unescaped $ character,
 | ||||
| //     e.g. "Hello $f".
 | ||||
| // In debug mode, i.e. #ifndef NDEBUG, such errors terminate the program.
 | ||||
| 
 | ||||
| #ifndef ABSL_STRINGS_SUBSTITUTE_H_ | ||||
| #define ABSL_STRINGS_SUBSTITUTE_H_ | ||||
| 
 | ||||
| #include <cstring> | ||||
| #include <string> | ||||
| #include <type_traits> | ||||
| #include <vector> | ||||
| 
 | ||||
| #include "absl/base/macros.h" | ||||
| #include "absl/base/port.h" | ||||
| #include "absl/strings/ascii.h" | ||||
| #include "absl/strings/escaping.h" | ||||
| #include "absl/strings/numbers.h" | ||||
| #include "absl/strings/str_cat.h" | ||||
| #include "absl/strings/str_split.h" | ||||
| #include "absl/strings/string_view.h" | ||||
| #include "absl/strings/strip.h" | ||||
| 
 | ||||
| namespace absl { | ||||
| ABSL_NAMESPACE_BEGIN | ||||
| namespace substitute_internal { | ||||
| 
 | ||||
| // Arg
 | ||||
| //
 | ||||
| // This class provides an argument type for `absl::Substitute()` and
 | ||||
| // `absl::SubstituteAndAppend()`. `Arg` handles implicit conversion of various
 | ||||
| // types to a string. (`Arg` is very similar to the `AlphaNum` class in
 | ||||
| // `StrCat()`.)
 | ||||
| //
 | ||||
| // This class has implicit constructors.
 | ||||
| class Arg { | ||||
|  public: | ||||
|   // Overloads for string-y things
 | ||||
|   //
 | ||||
|   // Explicitly overload `const char*` so the compiler doesn't cast to `bool`.
 | ||||
|   Arg(const char* value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(absl::NullSafeStringView(value)) {} | ||||
|   template <typename Allocator> | ||||
|   Arg(  // NOLINT
 | ||||
|       const std::basic_string<char, std::char_traits<char>, Allocator>& | ||||
|           value) noexcept | ||||
|       : piece_(value) {} | ||||
|   Arg(absl::string_view value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(value) {} | ||||
| 
 | ||||
|   // Overloads for primitives
 | ||||
|   //
 | ||||
|   // No overloads are available for signed and unsigned char because if people
 | ||||
|   // are explicitly declaring their chars as signed or unsigned then they are
 | ||||
|   // probably using them as 8-bit integers and would probably prefer an integer
 | ||||
|   // representation. However, we can't really know, so we make the caller decide
 | ||||
|   // what to do.
 | ||||
|   Arg(char value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(scratch_, 1) { | ||||
|     scratch_[0] = value; | ||||
|   } | ||||
|   Arg(short value)  // NOLINT(*)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(unsigned short value)  // NOLINT(*)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(int value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(unsigned int value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(long value)  // NOLINT(*)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(unsigned long value)  // NOLINT(*)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(long long value)  // NOLINT(*)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(unsigned long long value)  // NOLINT(*)
 | ||||
|       : piece_(scratch_, | ||||
|                numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} | ||||
|   Arg(float value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(scratch_, numbers_internal::SixDigitsToBuffer(value, scratch_)) { | ||||
|   } | ||||
|   Arg(double value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(scratch_, numbers_internal::SixDigitsToBuffer(value, scratch_)) { | ||||
|   } | ||||
|   Arg(bool value)  // NOLINT(runtime/explicit)
 | ||||
|       : piece_(value ? "true" : "false") {} | ||||
| 
 | ||||
|   Arg(Hex hex);  // NOLINT(runtime/explicit)
 | ||||
|   Arg(Dec dec);  // NOLINT(runtime/explicit)
 | ||||
| 
 | ||||
|   // vector<bool>::reference and const_reference require special help to
 | ||||
|   // convert to `AlphaNum` because it requires two user defined conversions.
 | ||||
|   template <typename T, | ||||
|             absl::enable_if_t< | ||||
|                 std::is_class<T>::value && | ||||
|                 (std::is_same<T, std::vector<bool>::reference>::value || | ||||
|                  std::is_same<T, std::vector<bool>::const_reference>::value)>* = | ||||
|                 nullptr> | ||||
|   Arg(T value)  // NOLINT(google-explicit-constructor)
 | ||||
|       : Arg(static_cast<bool>(value)) {} | ||||
| 
 | ||||
|   // `void*` values, with the exception of `char*`, are printed as
 | ||||
|   // "0x<hex value>". However, in the case of `nullptr`, "NULL" is printed.
 | ||||
|   Arg(const void* value);  // NOLINT(runtime/explicit)
 | ||||
| 
 | ||||
|   Arg(const Arg&) = delete; | ||||
|   Arg& operator=(const Arg&) = delete; | ||||
| 
 | ||||
|   absl::string_view piece() const { return piece_; } | ||||
| 
 | ||||
|  private: | ||||
|   absl::string_view piece_; | ||||
|   char scratch_[numbers_internal::kFastToBufferSize]; | ||||
| }; | ||||
| 
 | ||||
| // Internal helper function. Don't call this from outside this implementation.
 | ||||
| // This interface may change without notice.
 | ||||
| void SubstituteAndAppendArray(std::string* output, absl::string_view format, | ||||
|                               const absl::string_view* args_array, | ||||
|                               size_t num_args); | ||||
| 
 | ||||
| #if defined(ABSL_BAD_CALL_IF) | ||||
| constexpr int CalculateOneBit(const char* format) { | ||||
|   // Returns:
 | ||||
|   // * 2^N for '$N' when N is in [0-9]
 | ||||
|   // * 0 for correct '$' escaping: '$$'.
 | ||||
|   // * -1 otherwise.
 | ||||
|   return (*format < '0' || *format > '9') ? (*format == '$' ? 0 : -1) | ||||
|                                           : (1 << (*format - '0')); | ||||
| } | ||||
| 
 | ||||
| constexpr const char* SkipNumber(const char* format) { | ||||
|   return !*format ? format : (format + 1); | ||||
| } | ||||
| 
 | ||||
| constexpr int PlaceholderBitmask(const char* format) { | ||||
|   return !*format | ||||
|              ? 0 | ||||
|              : *format != '$' ? PlaceholderBitmask(format + 1) | ||||
|                               : (CalculateOneBit(format + 1) | | ||||
|                                  PlaceholderBitmask(SkipNumber(format + 1))); | ||||
| } | ||||
| #endif  // ABSL_BAD_CALL_IF
 | ||||
| 
 | ||||
| }  // namespace substitute_internal
 | ||||
| 
 | ||||
| //
 | ||||
| // PUBLIC API
 | ||||
| //
 | ||||
| 
 | ||||
| // SubstituteAndAppend()
 | ||||
| //
 | ||||
| // Substitutes variables into a given format string and appends to a given
 | ||||
| // output string. See file comments above for usage.
 | ||||
| //
 | ||||
| // The declarations of `SubstituteAndAppend()` below consist of overloads
 | ||||
| // for passing 0 to 10 arguments, respectively.
 | ||||
| //
 | ||||
| // NOTE: A zero-argument `SubstituteAndAppend()` may be used within variadic
 | ||||
| // templates to allow a variable number of arguments.
 | ||||
| //
 | ||||
| // Example:
 | ||||
| //  template <typename... Args>
 | ||||
| //  void VarMsg(std::string* boilerplate, absl::string_view format,
 | ||||
| //      const Args&... args) {
 | ||||
| //    absl::SubstituteAndAppend(boilerplate, format, args...);
 | ||||
| //  }
 | ||||
| //
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format) { | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, nullptr, 0); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0) { | ||||
|   const absl::string_view args[] = {a0.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0, | ||||
|                                 const substitute_internal::Arg& a1) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0, | ||||
|                                 const substitute_internal::Arg& a1, | ||||
|                                 const substitute_internal::Arg& a2) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0, | ||||
|                                 const substitute_internal::Arg& a1, | ||||
|                                 const substitute_internal::Arg& a2, | ||||
|                                 const substitute_internal::Arg& a3) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(), | ||||
|                                     a3.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0, | ||||
|                                 const substitute_internal::Arg& a1, | ||||
|                                 const substitute_internal::Arg& a2, | ||||
|                                 const substitute_internal::Arg& a3, | ||||
|                                 const substitute_internal::Arg& a4) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(), | ||||
|                                     a3.piece(), a4.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0, | ||||
|                                 const substitute_internal::Arg& a1, | ||||
|                                 const substitute_internal::Arg& a2, | ||||
|                                 const substitute_internal::Arg& a3, | ||||
|                                 const substitute_internal::Arg& a4, | ||||
|                                 const substitute_internal::Arg& a5) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(), | ||||
|                                     a3.piece(), a4.piece(), a5.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend(std::string* output, absl::string_view format, | ||||
|                                 const substitute_internal::Arg& a0, | ||||
|                                 const substitute_internal::Arg& a1, | ||||
|                                 const substitute_internal::Arg& a2, | ||||
|                                 const substitute_internal::Arg& a3, | ||||
|                                 const substitute_internal::Arg& a4, | ||||
|                                 const substitute_internal::Arg& a5, | ||||
|                                 const substitute_internal::Arg& a6) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(), | ||||
|                                     a3.piece(), a4.piece(), a5.piece(), | ||||
|                                     a6.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend( | ||||
|     std::string* output, absl::string_view format, | ||||
|     const substitute_internal::Arg& a0, const substitute_internal::Arg& a1, | ||||
|     const substitute_internal::Arg& a2, const substitute_internal::Arg& a3, | ||||
|     const substitute_internal::Arg& a4, const substitute_internal::Arg& a5, | ||||
|     const substitute_internal::Arg& a6, const substitute_internal::Arg& a7) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(), | ||||
|                                     a3.piece(), a4.piece(), a5.piece(), | ||||
|                                     a6.piece(), a7.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend( | ||||
|     std::string* output, absl::string_view format, | ||||
|     const substitute_internal::Arg& a0, const substitute_internal::Arg& a1, | ||||
|     const substitute_internal::Arg& a2, const substitute_internal::Arg& a3, | ||||
|     const substitute_internal::Arg& a4, const substitute_internal::Arg& a5, | ||||
|     const substitute_internal::Arg& a6, const substitute_internal::Arg& a7, | ||||
|     const substitute_internal::Arg& a8) { | ||||
|   const absl::string_view args[] = {a0.piece(), a1.piece(), a2.piece(), | ||||
|                                     a3.piece(), a4.piece(), a5.piece(), | ||||
|                                     a6.piece(), a7.piece(), a8.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| inline void SubstituteAndAppend( | ||||
|     std::string* output, absl::string_view format, | ||||
|     const substitute_internal::Arg& a0, const substitute_internal::Arg& a1, | ||||
|     const substitute_internal::Arg& a2, const substitute_internal::Arg& a3, | ||||
|     const substitute_internal::Arg& a4, const substitute_internal::Arg& a5, | ||||
|     const substitute_internal::Arg& a6, const substitute_internal::Arg& a7, | ||||
|     const substitute_internal::Arg& a8, const substitute_internal::Arg& a9) { | ||||
|   const absl::string_view args[] = { | ||||
|       a0.piece(), a1.piece(), a2.piece(), a3.piece(), a4.piece(), | ||||
|       a5.piece(), a6.piece(), a7.piece(), a8.piece(), a9.piece()}; | ||||
|   substitute_internal::SubstituteAndAppendArray(output, format, args, | ||||
|                                                 ABSL_ARRAYSIZE(args)); | ||||
| } | ||||
| 
 | ||||
| #if defined(ABSL_BAD_CALL_IF) | ||||
| // This body of functions catches cases where the number of placeholders
 | ||||
| // doesn't match the number of data arguments.
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 0, | ||||
|                      "There were no substitution arguments " | ||||
|                      "but this format string has a $[0-9] in it"); | ||||
| 
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format, | ||||
|                          const substitute_internal::Arg& a0) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1, | ||||
|                      "There was 1 substitution argument given, but " | ||||
|                      "this format string is either missing its $0, or " | ||||
|                      "contains one of $1-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format, | ||||
|                          const substitute_internal::Arg& a0, | ||||
|                          const substitute_internal::Arg& a1) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 3, | ||||
|                      "There were 2 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0/$1, or " | ||||
|                      "contains one of $2-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format, | ||||
|                          const substitute_internal::Arg& a0, | ||||
|                          const substitute_internal::Arg& a1, | ||||
|                          const substitute_internal::Arg& a2) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 7, | ||||
|                      "There were 3 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0/$1/$2, or " | ||||
|                      "contains one of $3-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format, | ||||
|                          const substitute_internal::Arg& a0, | ||||
|                          const substitute_internal::Arg& a1, | ||||
|                          const substitute_internal::Arg& a2, | ||||
|                          const substitute_internal::Arg& a3) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 15, | ||||
|                      "There were 4 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$3, or " | ||||
|                      "contains one of $4-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format, | ||||
|                          const substitute_internal::Arg& a0, | ||||
|                          const substitute_internal::Arg& a1, | ||||
|                          const substitute_internal::Arg& a2, | ||||
|                          const substitute_internal::Arg& a3, | ||||
|                          const substitute_internal::Arg& a4) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 31, | ||||
|                      "There were 5 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$4, or " | ||||
|                      "contains one of $5-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend(std::string* output, const char* format, | ||||
|                          const substitute_internal::Arg& a0, | ||||
|                          const substitute_internal::Arg& a1, | ||||
|                          const substitute_internal::Arg& a2, | ||||
|                          const substitute_internal::Arg& a3, | ||||
|                          const substitute_internal::Arg& a4, | ||||
|                          const substitute_internal::Arg& a5) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 63, | ||||
|                      "There were 6 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$5, or " | ||||
|                      "contains one of $6-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend( | ||||
|     std::string* output, const char* format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 127, | ||||
|                      "There were 7 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$6, or " | ||||
|                      "contains one of $7-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend( | ||||
|     std::string* output, const char* format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 255, | ||||
|                      "There were 8 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$7, or " | ||||
|                      "contains one of $8-$9"); | ||||
| 
 | ||||
| void SubstituteAndAppend( | ||||
|     std::string* output, const char* format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7, const substitute_internal::Arg& a8) | ||||
|     ABSL_BAD_CALL_IF( | ||||
|         substitute_internal::PlaceholderBitmask(format) != 511, | ||||
|         "There were 9 substitution arguments given, but " | ||||
|         "this format string is either missing its $0-$8, or contains a $9"); | ||||
| 
 | ||||
| void SubstituteAndAppend( | ||||
|     std::string* output, const char* format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7, const substitute_internal::Arg& a8, | ||||
|     const substitute_internal::Arg& a9) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1023, | ||||
|                      "There were 10 substitution arguments given, but this " | ||||
|                      "format string doesn't contain all of $0 through $9"); | ||||
| #endif  // ABSL_BAD_CALL_IF
 | ||||
| 
 | ||||
| // Substitute()
 | ||||
| //
 | ||||
| // Substitutes variables into a given format string. See file comments above
 | ||||
| // for usage.
 | ||||
| //
 | ||||
| // The declarations of `Substitute()` below consist of overloads for passing 0
 | ||||
| // to 10 arguments, respectively.
 | ||||
| //
 | ||||
| // NOTE: A zero-argument `Substitute()` may be used within variadic templates to
 | ||||
| // allow a variable number of arguments.
 | ||||
| //
 | ||||
| // Example:
 | ||||
| //  template <typename... Args>
 | ||||
| //  void VarMsg(absl::string_view format, const Args&... args) {
 | ||||
| //    std::string s = absl::Substitute(format, args...);
 | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute(absl::string_view format) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6, a7); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7, const substitute_internal::Arg& a8) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6, a7, a8); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| ABSL_MUST_USE_RESULT inline std::string Substitute( | ||||
|     absl::string_view format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7, const substitute_internal::Arg& a8, | ||||
|     const substitute_internal::Arg& a9) { | ||||
|   std::string result; | ||||
|   SubstituteAndAppend(&result, format, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); | ||||
|   return result; | ||||
| } | ||||
| 
 | ||||
| #if defined(ABSL_BAD_CALL_IF) | ||||
| // This body of functions catches cases where the number of placeholders
 | ||||
| // doesn't match the number of data arguments.
 | ||||
| std::string Substitute(const char* format) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 0, | ||||
|                      "There were no substitution arguments " | ||||
|                      "but this format string has a $[0-9] in it"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1, | ||||
|                      "There was 1 substitution argument given, but " | ||||
|                      "this format string is either missing its $0, or " | ||||
|                      "contains one of $1-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 3, | ||||
|                      "There were 2 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0/$1, or " | ||||
|                      "contains one of $2-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1, | ||||
|                        const substitute_internal::Arg& a2) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 7, | ||||
|                      "There were 3 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0/$1/$2, or " | ||||
|                      "contains one of $3-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1, | ||||
|                        const substitute_internal::Arg& a2, | ||||
|                        const substitute_internal::Arg& a3) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 15, | ||||
|                      "There were 4 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$3, or " | ||||
|                      "contains one of $4-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1, | ||||
|                        const substitute_internal::Arg& a2, | ||||
|                        const substitute_internal::Arg& a3, | ||||
|                        const substitute_internal::Arg& a4) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 31, | ||||
|                      "There were 5 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$4, or " | ||||
|                      "contains one of $5-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1, | ||||
|                        const substitute_internal::Arg& a2, | ||||
|                        const substitute_internal::Arg& a3, | ||||
|                        const substitute_internal::Arg& a4, | ||||
|                        const substitute_internal::Arg& a5) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 63, | ||||
|                      "There were 6 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$5, or " | ||||
|                      "contains one of $6-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1, | ||||
|                        const substitute_internal::Arg& a2, | ||||
|                        const substitute_internal::Arg& a3, | ||||
|                        const substitute_internal::Arg& a4, | ||||
|                        const substitute_internal::Arg& a5, | ||||
|                        const substitute_internal::Arg& a6) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 127, | ||||
|                      "There were 7 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$6, or " | ||||
|                      "contains one of $7-$9"); | ||||
| 
 | ||||
| std::string Substitute(const char* format, const substitute_internal::Arg& a0, | ||||
|                        const substitute_internal::Arg& a1, | ||||
|                        const substitute_internal::Arg& a2, | ||||
|                        const substitute_internal::Arg& a3, | ||||
|                        const substitute_internal::Arg& a4, | ||||
|                        const substitute_internal::Arg& a5, | ||||
|                        const substitute_internal::Arg& a6, | ||||
|                        const substitute_internal::Arg& a7) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 255, | ||||
|                      "There were 8 substitution arguments given, but " | ||||
|                      "this format string is either missing its $0-$7, or " | ||||
|                      "contains one of $8-$9"); | ||||
| 
 | ||||
| std::string Substitute( | ||||
|     const char* format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7, const substitute_internal::Arg& a8) | ||||
|     ABSL_BAD_CALL_IF( | ||||
|         substitute_internal::PlaceholderBitmask(format) != 511, | ||||
|         "There were 9 substitution arguments given, but " | ||||
|         "this format string is either missing its $0-$8, or contains a $9"); | ||||
| 
 | ||||
| std::string Substitute( | ||||
|     const char* format, const substitute_internal::Arg& a0, | ||||
|     const substitute_internal::Arg& a1, const substitute_internal::Arg& a2, | ||||
|     const substitute_internal::Arg& a3, const substitute_internal::Arg& a4, | ||||
|     const substitute_internal::Arg& a5, const substitute_internal::Arg& a6, | ||||
|     const substitute_internal::Arg& a7, const substitute_internal::Arg& a8, | ||||
|     const substitute_internal::Arg& a9) | ||||
|     ABSL_BAD_CALL_IF(substitute_internal::PlaceholderBitmask(format) != 1023, | ||||
|                      "There were 10 substitution arguments given, but this " | ||||
|                      "format string doesn't contain all of $0 through $9"); | ||||
| #endif  // ABSL_BAD_CALL_IF
 | ||||
| 
 | ||||
| ABSL_NAMESPACE_END | ||||
| }  // namespace absl
 | ||||
| 
 | ||||
| #endif  // ABSL_STRINGS_SUBSTITUTE_H_
 | ||||
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