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fix: restore full range of _ functions (#3571)

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Henry Schreiner 2021-12-23 14:50:10 -05:00 committed by GitHub
parent d4b9f3471f
commit cb302305a3
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1 changed files with 25 additions and 8 deletions
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33
include/pybind11/detail/descr.h
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@ -57,14 +57,6 @@ template <size_t N>
constexpr descr<N - 1> const_name(char const(&text)[N]) { return descr<N - 1>(text); } constexpr descr<N - 1> const_name(char const(&text)[N]) { return descr<N - 1>(text); }
constexpr descr<0> const_name(char const(&)[1]) { return {}; } constexpr descr<0> const_name(char const(&)[1]) { return {}; }
// The "_" might be defined as a macro - don't define it if so.
// Repeating the const_name code to avoid introducing a #define.
#ifndef _
template <size_t N>
constexpr descr<N - 1> _(char const(&text)[N]) { return descr<N - 1>(text); }
constexpr descr<0> _(char const(&)[1]) { return {}; }
#endif
template <size_t Rem, size_t... Digits> struct int_to_str : int_to_str<Rem/10, Rem%10, Digits...> { }; template <size_t Rem, size_t... Digits> struct int_to_str : int_to_str<Rem/10, Rem%10, Digits...> { };
template <size_t...Digits> struct int_to_str<0, Digits...> { template <size_t...Digits> struct int_to_str<0, Digits...> {
static constexpr auto digits = descr<sizeof...(Digits)>(('0' + Digits)...); static constexpr auto digits = descr<sizeof...(Digits)>(('0' + Digits)...);
@ -92,6 +84,31 @@ auto constexpr const_name() -> remove_cv_t<decltype(int_to_str<Size / 10, Size %
template <typename Type> constexpr descr<1, Type> const_name() { return {'%'}; } template <typename Type> constexpr descr<1, Type> const_name() { return {'%'}; }
// The "_" might be defined as a macro - don't define it if so.
// Repeating the const_name code to avoid introducing a #define.
#ifndef _
template <size_t N>
constexpr descr<N-1> _(char const(&text)[N]) { return const_name<N>(text); }
template <bool B, size_t N1, size_t N2>
constexpr enable_if_t<B, descr<N1 - 1>> _(char const(&text1)[N1], char const(&text2)[N2]) {
return const_name<B,N1,N2>(text1, text2);
}
template <bool B, size_t N1, size_t N2>
constexpr enable_if_t<!B, descr<N2 - 1>> _(char const(&text1)[N1], char const(&text2)[N2]) {
return const_name<B,N1,N2>(text1, text2);
}
template <bool B, typename T1, typename T2>
constexpr enable_if_t<B, T1> _(const T1 &d1, const T2 &d2) { return const_name<B,T1,T2>(d1, d2); }
template <bool B, typename T1, typename T2>
constexpr enable_if_t<!B, T2> _(const T1 &d1, const T2 &d2) { return const_name<B,T1,T2>(d1, d2); }
template <size_t Size>
auto constexpr _() -> remove_cv_t<decltype(int_to_str<Size / 10, Size % 10>::digits)> {
return const_name<Size>();
}
template <typename Type> constexpr descr<1, Type> _() { return const_name<Type>(); }
#endif
constexpr descr<0> concat() { return {}; } constexpr descr<0> concat() { return {}; }
template <size_t N, typename... Ts> template <size_t N, typename... Ts>