to_chars
: migrating from custom switch to __cpp_lib_to_chars
#118
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Previously the flag
ADOBE_HAS_TO_CHARS_FP
was derived from the existence (or lack) of a macOS-dependent preprocessor macro, which turned out to be flaky for the purposes of deciding ifto_chars
is available for use or not.This PR instead switches the check to use the more standard
defined(__cpp_lib_to_chars) >= 201611L
. All checks of this switch have also been moved to source files to eliminate ODR violations. I commandeered the defunctstring.cpp
file to be the home of theto_string
implementation.