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Merge pull request #1157 from zzyyyl/feat/string_replace

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perf: 优化字符串替换
This commit is contained in:
MistEO
2022-07-14 21:47:09 +08:00
committed by GitHub
parent ef0ac7f320 3f83d5ee4c
commit dcd606f6d6
1 changed files with 31 additions and 4 deletions
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35
src/MeoAssistant/AsstUtils.hpp
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@@ -17,23 +17,50 @@
namespace asst::utils
{
inline std::string string_replace_all(const std::string& src, const std::string& old_value, const std::string& new_value)
inline void _string_replace_all(std::string& str, const std::string_view& old_value, const std::string_view& new_value)
{
std::string str = src;
for (std::string::size_type pos(0); pos != std::string::npos; pos += new_value.length()) {
if ((pos = str.find(old_value, pos)) != std::string::npos)
str.replace(pos, old_value.length(), new_value);
else
break;
}
}
inline std::string string_replace_all(const std::string& src, const std::string_view& old_value, const std::string_view& new_value)
{
std::string str = src;
_string_replace_all(str, old_value, new_value);
return str;
}
inline std::string string_replace_all_batch(const std::string& src, const std::unordered_map<std::string, std::string>& replace_pairs)
inline std::string string_replace_all_batch(const std::string& src, std::initializer_list<std::pair<std::string_view, std::string_view>>&& replace_pairs)
{
std::string str = src;
for (const auto& [old_value, new_value] : replace_pairs) {
str = string_replace_all(str, old_value, new_value);
_string_replace_all(str, old_value, new_value);
}
return str;
}
template<typename map_t>
inline std::string string_replace_all_batch(const std::string& src, const map_t& replace_pairs)
{
// 以下两个 static_assert 保证了 map_t 的实际类型，它可以是:
// initializer_list<pair<string, string>>
// vector<pair<string, string>>
// unordered_map<string, string>
// map<string, string>
// 但不能是
// initializer_list<pair<string_view, string_view>>
// 等其它类型
static_assert(std::is_base_of<typename map_t::value_type::first_type, std::string>::value,
"type `map_t::value_type::first_type` is not allowed.");
static_assert(std::is_base_of<typename map_t::value_type::second_type, std::string>::value,
"type `map_t::value_type::second_type` is not allowed.");
std::string str = src;
for (const auto& [old_value, new_value] : replace_pairs) {
_string_replace_all(str, old_value, new_value);
}
return str;
}