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fix #2210 #2211

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merged 5 commits into from
Apr 7, 2021
Merged

fix #2210 #2211

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df6827e
fix #2210
apache-hb Apr 5, 2021
7b5ef2d
use const_check
apache-hb Apr 5, 2021
523bc41
clang-format
apache-hb Apr 6, 2021
cab7833
apply original comment
apache-hb Apr 7, 2021
d67b4a4
clang format
apache-hb Apr 7, 2021
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11 changes: 7 additions & 4 deletions include/fmt/core.h
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Original file line number Diff line number Diff line change
Expand Up @@ -392,11 +392,14 @@ template <typename Char> class basic_string_view {
the size with ``std::char_traits<Char>::length``.
\endrst
*/
#if __cplusplus >= 201703L // C++17's char_traits::length() is constexpr.
FMT_CONSTEXPR
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And another observation, it's not about this PR, just these lines in general: probably constexpr can be used here, not FMT_CONSTEXPR, since it's already under the __cplusplus >= 201703L macro check.

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Looks like this actually can be applied to this PR too, since it's also used in newly introduced macro definition.

#if __cplusplus >= 201703L // C++17's char_traits::length() is constexpr.
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Apply clang-format here, please

constexpr
#endif
FMT_INLINE basic_string_view(const Char* s) : data_(s) {
if (std::is_same<Char, char>::value && !detail::is_constant_evaluated())
FMT_INLINE
basic_string_view(const Char* s)
: data_(s) {
Comment on lines +398 to +400
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Did clang-format do this?

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@alexezeder alexezeder Apr 7, 2021 •
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Yeah, it's:

#if __cplusplus >= 201703L  // C++17's char_traits::length() is constexpr.
  FMT_CONSTEXPR
#endif
  FMT_INLINE
  basic_string_view(const Char* s) : data_(s) {

or:

#if __cplusplus >= 201703L  // C++17's char_traits::length() is constexpr.
  FMT_CONSTEXPR
#endif
  FMT_INLINE basic_string_view(const Char* s) : data_(s) {

or:

#if __cplusplus >= 201703L  // C++17's char_traits::length() is constexpr.
  constexpr
#endif
      FMT_INLINE
      basic_string_view(const Char* s)
      : data_(s) {

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LOL

if (detail::const_check(std::is_same<Char, char>::value &&
!detail::is_constant_evaluated()))
size_ = std::strlen(reinterpret_cast<const char*>(s));
else
size_ = std::char_traits<Char>::length(s);
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