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Make use of std::string_view on C++17.

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This commit is contained in:
Akira Miyakoda 2019-10-18 06:32:49 +09:00
parent 170e2d11f5
commit e206540d17
1 changed files with 20 additions and 10 deletions
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30
source/utf8/cpp11.h
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@ -34,65 +34,75 @@ DEALINGS IN THE SOFTWARE.
namespace utf8
{
#if UTF_CPP_CPLUSPLUS >= 201703L
using string_t = std::string_view;
using u16string_t = std::u16string_view;
using u32string_t = std::u32string_view;
#else
using string_t = const std::string &;
using u16string_t = const std::u16string &;
using u32string_t = const std::u32string &;
#endif
inline void append(char32_t cp, std::string& s)
{
append(uint32_t(cp), std::back_inserter(s));
}
inline std::string utf16to8(const std::u16string& s)
inline std::string utf16to8(u16string_t s)
{
std::string result;
utf16to8(s.begin(), s.end(), std::back_inserter(result));
return result;
}
inline std::u16string utf8to16(const std::string& s)
inline std::u16string utf8to16(string_t s)
{
std::u16string result;
utf8to16(s.begin(), s.end(), std::back_inserter(result));
return result;
}
inline std::string utf32to8(const std::u32string& s)
inline std::string utf32to8(u32string_t s)
{
std::string result;
utf32to8(s.begin(), s.end(), std::back_inserter(result));
return result;
}
inline std::u32string utf8to32(const std::string& s)
inline std::u32string utf8to32(string_t s)
{
std::u32string result;
utf8to32(s.begin(), s.end(), std::back_inserter(result));
return result;
}
inline std::size_t find_invalid(const std::string& s)
inline std::size_t find_invalid(string_t s)
{
std::string::const_iterator invalid = find_invalid(s.begin(), s.end());
const auto invalid = find_invalid(s.begin(), s.end());
return (invalid == s.end()) ? std::string::npos : (invalid - s.begin());
}
inline bool is_valid(const std::string& s)
inline bool is_valid(string_t s)
{
return is_valid(s.begin(), s.end());
}
inline std::string replace_invalid(const std::string& s, char32_t replacement)
inline std::string replace_invalid(string_t s, char32_t replacement)
{
std::string result;
replace_invalid(s.begin(), s.end(), std::back_inserter(result), replacement);
return result;
}
inline std::string replace_invalid(const std::string& s)
inline std::string replace_invalid(string_t s)
{
std::string result;
replace_invalid(s.begin(), s.end(), std::back_inserter(result));
return result;
}
inline bool starts_with_bom(const std::string& s)
inline bool starts_with_bom(string_t s)
{
return starts_with_bom(s.begin(), s.end());
}