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Diffstat (limited to 'third_party/abseil_cpp/absl/strings/str_join.h')
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diff --git a/third_party/abseil_cpp/absl/strings/str_join.h b/third_party/abseil_cpp/absl/strings/str_join.h deleted file mode 100644 index ae5731a42b..0000000000 --- a/third_party/abseil_cpp/absl/strings/str_join.h +++ /dev/null @@ -1,293 +0,0 @@ -// -// 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: str_join.h -// ----------------------------------------------------------------------------- -// -// This header file contains functions for joining a range of elements and -// returning the result as a std::string. StrJoin operations are specified by -// passing a range, a separator string to use between the elements joined, and -// an optional Formatter responsible for converting each argument in the range -// to a string. If omitted, a default `AlphaNumFormatter()` is called on the -// elements to be joined, using the same formatting that `absl::StrCat()` uses. -// This package defines a number of default formatters, and you can define your -// own implementations. -// -// Ranges are specified by passing a container with `std::begin()` and -// `std::end()` iterators, container-specific `begin()` and `end()` iterators, a -// brace-initialized `std::initializer_list`, or a `std::tuple` of heterogeneous -// objects. The separator string is specified as an `absl::string_view`. -// -// Because the default formatter uses the `absl::AlphaNum` class, -// `absl::StrJoin()`, like `absl::StrCat()`, will work out-of-the-box on -// collections of strings, ints, floats, doubles, etc. -// -// Example: -// -// std::vector<std::string> v = {"foo", "bar", "baz"}; -// std::string s = absl::StrJoin(v, "-"); -// EXPECT_EQ("foo-bar-baz", s); -// -// See comments on the `absl::StrJoin()` function for more examples. - -#ifndef ABSL_STRINGS_STR_JOIN_H_ -#define ABSL_STRINGS_STR_JOIN_H_ - -#include <cstdio> -#include <cstring> -#include <initializer_list> -#include <iterator> -#include <string> -#include <tuple> -#include <type_traits> -#include <utility> - -#include "absl/base/macros.h" -#include "absl/strings/internal/str_join_internal.h" -#include "absl/strings/string_view.h" - -namespace absl { -ABSL_NAMESPACE_BEGIN - -// ----------------------------------------------------------------------------- -// Concept: Formatter -// ----------------------------------------------------------------------------- -// -// A Formatter is a function object that is responsible for formatting its -// argument as a string and appending it to a given output std::string. -// Formatters may be implemented as function objects, lambdas, or normal -// functions. You may provide your own Formatter to enable `absl::StrJoin()` to -// work with arbitrary types. -// -// The following is an example of a custom Formatter that simply uses -// `std::to_string()` to format an integer as a std::string. -// -// struct MyFormatter { -// void operator()(std::string* out, int i) const { -// out->append(std::to_string(i)); -// } -// }; -// -// You would use the above formatter by passing an instance of it as the final -// argument to `absl::StrJoin()`: -// -// std::vector<int> v = {1, 2, 3, 4}; -// std::string s = absl::StrJoin(v, "-", MyFormatter()); -// EXPECT_EQ("1-2-3-4", s); -// -// The following standard formatters are provided within this file: -// -// - `AlphaNumFormatter()` (the default) -// - `StreamFormatter()` -// - `PairFormatter()` -// - `DereferenceFormatter()` - -// AlphaNumFormatter() -// -// Default formatter used if none is specified. Uses `absl::AlphaNum` to convert -// numeric arguments to strings. -inline strings_internal::AlphaNumFormatterImpl AlphaNumFormatter() { - return strings_internal::AlphaNumFormatterImpl(); -} - -// StreamFormatter() -// -// Formats its argument using the << operator. -inline strings_internal::StreamFormatterImpl StreamFormatter() { - return strings_internal::StreamFormatterImpl(); -} - -// Function Template: PairFormatter(Formatter, absl::string_view, Formatter) -// -// Formats a `std::pair` by putting a given separator between the pair's -// `.first` and `.second` members. This formatter allows you to specify -// custom Formatters for both the first and second member of each pair. -template <typename FirstFormatter, typename SecondFormatter> -inline strings_internal::PairFormatterImpl<FirstFormatter, SecondFormatter> -PairFormatter(FirstFormatter f1, absl::string_view sep, SecondFormatter f2) { - return strings_internal::PairFormatterImpl<FirstFormatter, SecondFormatter>( - std::move(f1), sep, std::move(f2)); -} - -// Function overload of PairFormatter() for using a default -// `AlphaNumFormatter()` for each Formatter in the pair. -inline strings_internal::PairFormatterImpl< - strings_internal::AlphaNumFormatterImpl, - strings_internal::AlphaNumFormatterImpl> -PairFormatter(absl::string_view sep) { - return PairFormatter(AlphaNumFormatter(), sep, AlphaNumFormatter()); -} - -// Function Template: DereferenceFormatter(Formatter) -// -// Formats its argument by dereferencing it and then applying the given -// formatter. This formatter is useful for formatting a container of -// pointer-to-T. This pattern often shows up when joining repeated fields in -// protocol buffers. -template <typename Formatter> -strings_internal::DereferenceFormatterImpl<Formatter> DereferenceFormatter( - Formatter&& f) { - return strings_internal::DereferenceFormatterImpl<Formatter>( - std::forward<Formatter>(f)); -} - -// Function overload of `DererefenceFormatter()` for using a default -// `AlphaNumFormatter()`. -inline strings_internal::DereferenceFormatterImpl< - strings_internal::AlphaNumFormatterImpl> -DereferenceFormatter() { - return strings_internal::DereferenceFormatterImpl< - strings_internal::AlphaNumFormatterImpl>(AlphaNumFormatter()); -} - -// ----------------------------------------------------------------------------- -// StrJoin() -// ----------------------------------------------------------------------------- -// -// Joins a range of elements and returns the result as a std::string. -// `absl::StrJoin()` takes a range, a separator string to use between the -// elements joined, and an optional Formatter responsible for converting each -// argument in the range to a string. -// -// If omitted, the default `AlphaNumFormatter()` is called on the elements to be -// joined. -// -// Example 1: -// // Joins a collection of strings. This pattern also works with a collection -// // of `absl::string_view` or even `const char*`. -// std::vector<std::string> v = {"foo", "bar", "baz"}; -// std::string s = absl::StrJoin(v, "-"); -// EXPECT_EQ("foo-bar-baz", s); -// -// Example 2: -// // Joins the values in the given `std::initializer_list<>` specified using -// // brace initialization. This pattern also works with an initializer_list -// // of ints or `absl::string_view` -- any `AlphaNum`-compatible type. -// std::string s = absl::StrJoin({"foo", "bar", "baz"}, "-"); -// EXPECT_EQ("foo-bar-baz", s); -// -// Example 3: -// // Joins a collection of ints. This pattern also works with floats, -// // doubles, int64s -- any `StrCat()`-compatible type. -// std::vector<int> v = {1, 2, 3, -4}; -// std::string s = absl::StrJoin(v, "-"); -// EXPECT_EQ("1-2-3--4", s); -// -// Example 4: -// // Joins a collection of pointer-to-int. By default, pointers are -// // dereferenced and the pointee is formatted using the default format for -// // that type; such dereferencing occurs for all levels of indirection, so -// // this pattern works just as well for `std::vector<int**>` as for -// // `std::vector<int*>`. -// int x = 1, y = 2, z = 3; -// std::vector<int*> v = {&x, &y, &z}; -// std::string s = absl::StrJoin(v, "-"); -// EXPECT_EQ("1-2-3", s); -// -// Example 5: -// // Dereferencing of `std::unique_ptr<>` is also supported: -// std::vector<std::unique_ptr<int>> v -// v.emplace_back(new int(1)); -// v.emplace_back(new int(2)); -// v.emplace_back(new int(3)); -// std::string s = absl::StrJoin(v, "-"); -// EXPECT_EQ("1-2-3", s); -// -// Example 6: -// // Joins a `std::map`, with each key-value pair separated by an equals -// // sign. This pattern would also work with, say, a -// // `std::vector<std::pair<>>`. -// std::map<std::string, int> m = { -// std::make_pair("a", 1), -// std::make_pair("b", 2), -// std::make_pair("c", 3)}; -// std::string s = absl::StrJoin(m, ",", absl::PairFormatter("=")); -// EXPECT_EQ("a=1,b=2,c=3", s); -// -// Example 7: -// // These examples show how `absl::StrJoin()` handles a few common edge -// // cases: -// std::vector<std::string> v_empty; -// EXPECT_EQ("", absl::StrJoin(v_empty, "-")); -// -// std::vector<std::string> v_one_item = {"foo"}; -// EXPECT_EQ("foo", absl::StrJoin(v_one_item, "-")); -// -// std::vector<std::string> v_empty_string = {""}; -// EXPECT_EQ("", absl::StrJoin(v_empty_string, "-")); -// -// std::vector<std::string> v_one_item_empty_string = {"a", ""}; -// EXPECT_EQ("a-", absl::StrJoin(v_one_item_empty_string, "-")); -// -// std::vector<std::string> v_two_empty_string = {"", ""}; -// EXPECT_EQ("-", absl::StrJoin(v_two_empty_string, "-")); -// -// Example 8: -// // Joins a `std::tuple<T...>` of heterogeneous types, converting each to -// // a std::string using the `absl::AlphaNum` class. -// std::string s = absl::StrJoin(std::make_tuple(123, "abc", 0.456), "-"); -// EXPECT_EQ("123-abc-0.456", s); - -template <typename Iterator, typename Formatter> -std::string StrJoin(Iterator start, Iterator end, absl::string_view sep, - Formatter&& fmt) { - return strings_internal::JoinAlgorithm(start, end, sep, fmt); -} - -template <typename Range, typename Formatter> -std::string StrJoin(const Range& range, absl::string_view separator, - Formatter&& fmt) { - return strings_internal::JoinRange(range, separator, fmt); -} - -template <typename T, typename Formatter> -std::string StrJoin(std::initializer_list<T> il, absl::string_view separator, - Formatter&& fmt) { - return strings_internal::JoinRange(il, separator, fmt); -} - -template <typename... T, typename Formatter> -std::string StrJoin(const std::tuple<T...>& value, absl::string_view separator, - Formatter&& fmt) { - return strings_internal::JoinAlgorithm(value, separator, fmt); -} - -template <typename Iterator> -std::string StrJoin(Iterator start, Iterator end, absl::string_view separator) { - return strings_internal::JoinRange(start, end, separator); -} - -template <typename Range> -std::string StrJoin(const Range& range, absl::string_view separator) { - return strings_internal::JoinRange(range, separator); -} - -template <typename T> -std::string StrJoin(std::initializer_list<T> il, - absl::string_view separator) { - return strings_internal::JoinRange(il, separator); -} - -template <typename... T> -std::string StrJoin(const std::tuple<T...>& value, - absl::string_view separator) { - return strings_internal::JoinAlgorithm(value, separator, AlphaNumFormatter()); -} - -ABSL_NAMESPACE_END -} // namespace absl - -#endif // ABSL_STRINGS_STR_JOIN_H_ |