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//
// 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 `Arg` 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)
// Normal enums are already handled by the integer formatters.
// This overload matches only scoped enums.
template <typename T,
typename = typename std::enable_if<
std::is_enum<T>{} && !std::is_convertible<T, int>{}>::type>
Arg(T value) // NOLINT(google-explicit-constructor)
: Arg(static_cast<typename std::underlying_type<T>::type>(value)) {}
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 either has a $[0-9] in it or contains "
"an unescaped $ character (use $$ instead)");
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 missing its $0, contains "
"one of $1-$9, or contains an unescaped $ character (use "
"$$ instead)");
void SubstituteAndAppend(std::string* output, const char* format,
const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 3,
"There were 2 substitution arguments given, but this format string is "
"missing its $0/$1, contains one of $2-$9, or contains an "
"unescaped $ character (use $$ instead)");
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 missing its $0/$1/$2, contains one of "
"$3-$9, or contains an unescaped $ character (use $$ instead)");
void SubstituteAndAppend(std::string* output, const char* format,
const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1,
const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 15,
"There were 4 substitution arguments given, but "
"this format string is missing its $0-$3, contains one of "
"$4-$9, or contains an unescaped $ character (use $$ instead)");
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 missing its $0-$4, contains one of "
"$5-$9, or contains an unescaped $ character (use $$ instead)");
void SubstituteAndAppend(std::string* output, const char* format,
const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1,
const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3,
const substitute_internal::Arg& a4,
const substitute_internal::Arg& a5)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 63,
"There were 6 substitution arguments given, but "
"this format string is missing its $0-$5, contains one of "
"$6-$9, or contains an unescaped $ character (use $$ instead)");
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 missing its $0-$6, contains one of "
"$7-$9, or contains an unescaped $ character (use $$ instead)");
void SubstituteAndAppend(
std::string* output, const char* format, const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
const substitute_internal::Arg& a7)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 255,
"There were 8 substitution arguments given, but "
"this format string is missing its $0-$7, contains one of "
"$8-$9, or contains an unescaped $ character (use $$ instead)");
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 missing its $0-$8, contains a $9, or "
"contains an unescaped $ character (use $$ instead)");
void SubstituteAndAppend(
std::string* output, const char* format, const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
const substitute_internal::Arg& a7, const substitute_internal::Arg& a8,
const substitute_internal::Arg& a9)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 1023,
"There were 10 substitution arguments given, but this "
"format string either doesn't contain all of $0 through $9 or "
"contains an unescaped $ character (use $$ instead)");
#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 either has a $[0-9] in it or "
"contains an unescaped $ character (use $$ instead)");
std::string Substitute(const char* format, const substitute_internal::Arg& a0)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 1,
"There was 1 substitution argument given, but "
"this format string is missing its $0, contains one of $1-$9, "
"or contains an unescaped $ character (use $$ instead)");
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 missing its $0/$1, contains one of "
"$2-$9, or contains an unescaped $ character (use $$ instead)");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1,
const substitute_internal::Arg& a2)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 7,
"There were 3 substitution arguments given, but "
"this format string is missing its $0/$1/$2, contains one of "
"$3-$9, or contains an unescaped $ character (use $$ instead)");
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 missing its $0-$3, contains one of "
"$4-$9, or contains an unescaped $ character (use $$ instead)");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1,
const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3,
const substitute_internal::Arg& a4)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 31,
"There were 5 substitution arguments given, but "
"this format string is missing its $0-$4, contains one of "
"$5-$9, or contains an unescaped $ character (use $$ instead)");
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 missing its $0-$5, contains one of "
"$6-$9, or contains an unescaped $ character (use $$ instead)");
std::string Substitute(const char* format, const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1,
const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3,
const substitute_internal::Arg& a4,
const substitute_internal::Arg& a5,
const substitute_internal::Arg& a6)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 127,
"There were 7 substitution arguments given, but "
"this format string is missing its $0-$6, contains one of "
"$7-$9, or contains an unescaped $ character (use $$ instead)");
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 missing its $0-$7, contains one of "
"$8-$9, or contains an unescaped $ character (use $$ instead)");
std::string Substitute(
const char* format, const substitute_internal::Arg& a0,
const substitute_internal::Arg& a1, const substitute_internal::Arg& a2,
const substitute_internal::Arg& a3, const substitute_internal::Arg& a4,
const substitute_internal::Arg& a5, const substitute_internal::Arg& a6,
const substitute_internal::Arg& a7, const substitute_internal::Arg& a8)
ABSL_BAD_CALL_IF(
substitute_internal::PlaceholderBitmask(format) != 511,
"There were 9 substitution arguments given, but "
"this format string is missing its $0-$8, contains a $9, or "
"contains an unescaped $ character (use $$ instead)");
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 either doesn't contain all of $0 through $9 or "
"contains an unescaped $ character (use $$ instead)");
#endif // ABSL_BAD_CALL_IF
ABSL_NAMESPACE_END
} // namespace absl
#endif // ABSL_STRINGS_SUBSTITUTE_H_
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