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gh-91321: Fix compatibility with C++ older than C++11 (#93784)

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Fix the compatibility of the Python C API with C++ older than C++11.

_Py_NULL is only defined as nullptr on C++11 and newer.
This commit is contained in:
Victor Stinner 2022-06-14 11:43:08 +02:00 • committed by GitHub
parent 3597c12941
commit 4caf5c2753
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5 changed files with 76 additions and 36 deletions
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7
Include/pyport.h
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@ -36,10 +36,12 @@ extern "C++" {
inline type _Py_CAST_impl(int ptr) {
return reinterpret_cast<type>(ptr);
}
#if __cplusplus >= 201103
template <typename type>
inline type _Py_CAST_impl(std::nullptr_t) {
return static_cast<type>(nullptr);
}
#endif
template <typename type, typename expr_type>
inline type _Py_CAST_impl(expr_type *expr) {
@ -70,8 +72,9 @@ extern "C++" {
#endif
// Static inline functions should use _Py_NULL rather than using directly NULL
// to prevent C++ compiler warnings. In C++, _Py_NULL uses nullptr.
#ifdef __cplusplus
// to prevent C++ compiler warnings. On C++11 and newer, _Py_NULL is defined as
// nullptr.
#if defined(__cplusplus) && __cplusplus >= 201103
# define _Py_NULL nullptr
#else
# define _Py_NULL NULL