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/*
* Copyright 2017 WebAssembly Community Group participants
*
* 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.
*/
#ifndef WABT_STRING_UTIL_H_
#define WABT_STRING_UTIL_H_
#include <string>
#include <string_view>
namespace wabt {
inline std::string& operator+=(std::string& x, std::string_view y) {
x.append(y.data(), y.size());
return x;
}
inline std::string operator+(std::string_view x, std::string_view y) {
std::string s;
s.reserve(x.size() + y.size());
s.append(x.data(), x.size());
s.append(y.data(), y.size());
return s;
}
inline std::string operator+(const std::string& x, std::string_view y) {
return std::string_view(x) + y;
}
inline std::string operator+(std::string_view x, const std::string& y) {
return x + std::string_view(y);
}
inline std::string operator+(const char* x, std::string_view y) {
return std::string_view(x) + y;
}
inline std::string operator+(std::string_view x, const char* y) {
return x + std::string_view(y);
}
inline void cat_concatenate(std::string&) {}
template <typename T, typename... Ts>
void cat_concatenate(std::string& s, const T& t, const Ts&... args) {
s += t;
cat_concatenate(s, args...);
}
inline size_t cat_compute_size() {
return 0;
}
template <typename T, typename... Ts>
size_t cat_compute_size(const T& t, const Ts&... args) {
return std::string_view(t).size() + cat_compute_size(args...);
}
// Is able to concatenate any combination of string/string_view/char*
template <typename... Ts>
std::string cat(const Ts&... args) {
std::string s;
s.reserve(cat_compute_size(args...));
cat_concatenate(s, args...);
return s;
}
} // namespace wabt
#endif // WABT_STRING_UTIL_H_
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