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Diffstat (limited to 'absl/strings/substitute.h')
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diff --git a/absl/strings/substitute.h b/absl/strings/substitute.h new file mode 100644 index 000000000000..5d6bfd90c2fb --- /dev/null +++ b/absl/strings/substitute.h @@ -0,0 +1,674 @@ +// +// 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 +// +// http://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 std::string +// substitutions using a format std::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 std::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 std::string. For example, you cannot format an integer +// in hex. +// +// The format std::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 std::string. +// +// Example 1: +// std::string s = Substitute("$1 purchased $0 $2. Thanks $1!", +// 5, "Bob", "Apples"); +// EXPECT_EQ("Bob purchased 5 Apples. Thanks Bob!", s); +// +// Example 2: +// std::string s = "Hi. "; +// SubstituteAndAppend(&s, "My name is $0 and I am $1 years old.", "Bob", 5); +// EXPECT_EQ("Hi. My name is Bob and I am 5 years old.", s); +// +// Differences from `StringPrintf()`: +// * The format std::string does not identify the types of arguments. Instead, the +// arguments are implicitly converted to strings. See below for a list of +// accepted types. +// * Substitutions in the format std::string are identified by a '$' followed by a +// single digit. You can use arguments out-of-order and use the same +// argument multiple times. +// * A '$$' sequence in the format std::string means output a literal '$' +// character. +// * `Substitute()` is significantly faster than `StringPrintf()`. For very +// large strings, it may be orders of magnitude faster. +// +// Supported types: +// * absl::string_view, std::string, const char* (null is equivalent to "") +// * int32_t, int64_t, uint32_t, uint64 +// * float, double +// * bool (Printed as "true" or "false") +// * pointer types other than char* (Printed as "0x<lower case hex std::string>", +// except that null is printed as "NULL") +// +// If an invalid format std::string is provided, Substitute returns an empty std::string +// and SubstituteAndAppend does not change the provided output std::string. +// A format std::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 "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_join.h" +#include "absl/strings/str_split.h" +#include "absl/strings/string_view.h" +#include "absl/strings/strip.h" + +namespace absl { +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 std::string. (`Arg` is very similar to the `AlphaNum` class in +// `StrCat()`.) +// +// This class has implicit constructors. +class Arg { + public: + // Overloads for std::string-y things + // + // Explicitly overload `const char*` so the compiler doesn't cast to `bool`. + Arg(const char* value) // NOLINT(runtime/explicit) + : piece_(value) {} + Arg(const std::string& value) // NOLINT(runtime/explicit) + : 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(runtime/explicit) + : piece_(scratch_, + numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} + Arg(unsigned short value) // NOLINT(runtime/explicit) + : 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(runtime/explicit) + : piece_(scratch_, + numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} + Arg(unsigned long value) // NOLINT(runtime/explicit) + : piece_(scratch_, + numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} + Arg(long long value) // NOLINT(runtime/explicit) + : piece_(scratch_, + numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} + Arg(unsigned long long value) // NOLINT(runtime/explicit) + : piece_(scratch_, + numbers_internal::FastIntToBuffer(value, scratch_) - scratch_) {} + Arg(float value) // NOLINT(runtime/explicit) + : piece_(numbers_internal::RoundTripFloatToBuffer(value, scratch_)) {} + Arg(double value) // NOLINT(runtime/explicit) + : piece_(numbers_internal::RoundTripDoubleToBuffer(value, scratch_)) {} + Arg(bool value) // NOLINT(runtime/explicit) + : piece_(value ? "true" : "false") {} + // `void*` values, with the exception of `char*`, are printed as + // `StringPrintf()` with format "%p": e.g. ("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) { + return (*format < '0' || *format > '9') ? 0 : (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 std::string and appends to a given +// output std::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, const std::string& format, +// const Args&... args) { +// std::string s = 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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::string doesn't contain all of $0 through $9"); +#endif // ABSL_BAD_CALL_IF + +// Substitute() +// +// Substitutes variables into a given format std::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(const std::string& 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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::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 std::string doesn't contain all of $0 through $9"); +#endif // ABSL_BAD_CALL_IF + +} // namespace absl + +#endif // ABSL_STRINGS_SUBSTITUTE_H_ |