Difference between revisions of "cpp/header/charconv"
From cppreference.com
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Revision as of 22:21, 5 September 2023
This header is part of the strings library.
Classes | |
| (C++17) |
specifies formatting for std::to_chars and std::from_chars (enum) |
| (C++17) |
the return type of std::from_chars (class) |
| (C++17) |
the return type of std::to_chars (class) |
Functions | |
| (C++17) |
converts a character sequence to an integer or floating-point value (function) |
| (C++17) |
converts an integer or floating-point value to a character sequence (function) |
Synopsis
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; constexpr explicit operator bool() const noexcept { return ec == errc{}; } }; constexpr to_chars_result to_chars(char* first, char* last, /* integer-type */ 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, /* floating-point-type */ value); to_chars_result to_chars(char* first, char* last, /* floating-point-type */ value, chars_format fmt); to_chars_result to_chars(char* first, char* last, /* floating-point-type */ 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; constexpr explicit operator bool() const noexcept { return ec == errc{}; } }; constexpr from_chars_result from_chars(const char* first, const char* last, /* integer-type */& value, int base = 10); from_chars_result from_chars(const char* first, const char* last, /* floating-point-type */& value, chars_format fmt = chars_format::general); }
