* fix =#13790 ptr char (+friends) should not implicitly convert to cstring
* Apply suggestions from code review
* first round; compiles on windows
* nimPreviewSlimSystem
* conversion is unsafe, cast needed
* fixes more tests
* fixes asyncnet
* another try another error
* last one
* true
* one more
* why bugs didn't show at once
* add `nimPreviewCstringConversion` switch
* typo
* fixes ptr to cstring warnings[backport]
* add fixes
Co-authored-by: xflywind <43030857+xflywind@users.noreply.github.com>
(cherry picked from commit 06cd15663d)
Float literals were not parsed properly when their fractional part
exceeded 53 significant bits. This affected in particular math.PI
and math.E. Rather than reinventing the wheel, this patch reuses
C's strtod() implementation, which already does the heavy lifting
with respect to correctness, though some caution is necessary to
keep float parsing locale-independent.
