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std::chars_format - cppreference.com

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enum class chars_format { scientific = /*unspecified*/, fixed = /*unspecified*/, hex = /*unspecified*/, general = fixed | scientific };

 (since C++17)

A BitmaskType used to specify floating-point formatting for std::to_chars and std::from_chars.

Notes

Feature-test macro Value Std Feature
__cpp_lib_to_chars 201611L (C++17) Elementary string conversions (std::to_chars, std::from_chars)

Example

See also

converts an integer or floating-point value to a character sequence
(function) [edit]
converts a character sequence to an integer or floating-point value
(function) [edit]