標準ライブラリヘッダ <charconv>
提供: cppreference.com
クラス | |
| (C++17) |
std::to_chars および std::from_chars に対する書式を指定します (列挙) |
関数 | |
| (C++17) |
文字シーケンスを整数値または浮動小数点値に変換します (関数) |
| (C++17) |
整数値または浮動小数点値を文字シーケンスに変換します (関数) |
[編集] 概要
namespace std { // floating-point format for primitive numerical conversion enum class chars_format { scientific = /* unspecified */, fixed = /* unspecified */, hex = /* unspecified */, general = fixed | scientific }; // primitive numerical output conversion struct to_chars_result { char* ptr; errc ec; friend bool operator==(const to_chars_result&, const to_chars_result&) = default; }; to_chars_result to_chars(char* first, char* last, /* see description */ value, int base = 10); to_chars_result to_chars(char* first, char* last, bool value, int base = 10) = delete; to_chars_result to_chars(char* first, char* last, float value); to_chars_result to_chars(char* first, char* last, double value); to_chars_result to_chars(char* first, char* last, long double value); to_chars_result to_chars(char* first, char* last, float value, chars_format fmt); to_chars_result to_chars(char* first, char* last, double value, chars_format fmt); to_chars_result to_chars(char* first, char* last, long double value, chars_format fmt); to_chars_result to_chars(char* first, char* last, float value, chars_format fmt, int precision); to_chars_result to_chars(char* first, char* last, double value, chars_format fmt, int precision); to_chars_result to_chars(char* first, char* last, long double value, chars_format fmt, int precision); // primitive numerical input conversion struct from_chars_result { const char* ptr; errc ec; friend bool operator==(const from_chars_result&, const from_chars_result&) = default; }; from_chars_result from_chars(const char* first, const char* last, /* see description */& value, int base = 10); from_chars_result from_chars(const char* first, const char* last, float& value, chars_format fmt = chars_format::general); from_chars_result from_chars(const char* first, const char* last, double& value, chars_format fmt = chars_format::general); from_chars_result from_chars(const char* first, const char* last, long double& value, chars_format fmt = chars_format::general); }
