vcpkg/toolsrc/include/CStringView.h

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2017-04-04 05:21:51 +08:00
#pragma once
#include <string>
namespace vcpkg
{
template<class CharType>
struct BasicCStringView
{
constexpr BasicCStringView() : cstr(nullptr) {}
constexpr BasicCStringView(const CharType* cstr) : cstr(cstr) {}
BasicCStringView(const std::basic_string<CharType>& str) : cstr(str.c_str()) {}
constexpr operator const CharType*() const { return cstr; }
constexpr const CharType* c_str() const { return cstr; }
private:
const CharType* cstr;
};
using CStringView = BasicCStringView<char>;
using CWStringView = BasicCStringView<wchar_t>;
inline const char* to_printf_arg(const CStringView spec) { return spec.c_str(); }
inline const wchar_t* to_wprintf_arg(const CWStringView spec) { return spec.c_str(); }
static_assert(sizeof(CStringView) == sizeof(void*), "CStringView must be a simple wrapper around char*");
static_assert(sizeof(CWStringView) == sizeof(void*), "CWStringView must be a simple wrapper around wchar_t*");
}