charconv File Reference

Provides std::from_chars and std::to_chars if not defined in the stdlib <charconv> header. More...

#include <utility>

Include dependency graph for charconv:

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Macros
#define	SEQAN3_CPP_LIB_TO_CHARS   IMPLEMENTATION_DEFINED
	A workaround for __cpp_lib_to_chars. More...

Detailed Descriptionno-api

Provides std::from_chars and std::to_chars if not defined in the stdlib <charconv> header.

Author

Svenja Mehringer <svenja.mehringer AT fu-berlin.de>

Macro Definition Documentation

SEQAN3_CPP_LIB_TO_CHARS

#define SEQAN3_CPP_LIB_TO_CHARS   IMPLEMENTATION_DEFINED

no-api

A workaround for __cpp_lib_to_chars.

The following table describes what implementation of std::to_chars and std::from_chars will be used

stdlib version	__cpp_lib_to_chars	SEQAN3_CPP_LIB_TO_CHARS	chars_format	to_chars_result	from_chars_result	to_chars (int)	from_chars (int)	to_chars (float)	from_chars (float)
gcc 7	undefined and NO <charconv> header	undefined	contrib (llvm)	contrib (llvm)	contrib (llvm)	contrib (llvm)	contrib (llvm)	shim (ostringstream)	shim (strto[f/d/ld])
gcc 8	undefined and <charconv> header	100000	contrib (llvm)	stdlib	stdlib	stdlib	stdlib	shim (ostringstream)	shim (strto[f/d/ld])
gcc 9	undefined and <charconv> header	100000	contrib (llvm)	stdlib	stdlib	stdlib	stdlib	shim (ostringstream)	shim (strto[f/d/ld])
gcc 10	undefined and <charconv> header	100000	stdlib	stdlib	stdlib	stdlib	stdlib	shim (ostringstream)	shim (strto[f/d/ld])
gcc 11	undefined and <charconv> header	100000* (could be 201611)	stdlib	stdlib	stdlib	stdlib	stdlib	stdlib	stdlib

Note: gcc 11 implements float too, but does not define __cpp_lib_to_chars