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XSUB.h: fix C23 incompatibility in XSINTERFACE_* macros #23194

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XSUB.h: fix C23 incompatibility in XSINTERFACE_* macros #23194

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4 changes: 3 additions & 1 deletion XSUB.h
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Original file line number Diff line number Diff line change
Expand Up @@ -188,10 +188,12 @@ is a lexical C<$_> in scope.

#define dXSI32 I32 ix = XSANY.any_i32

#ifdef __cplusplus
#if defined(__cplusplus) || __STDC_VERSION__ >= 202311L
# define XSINTERFACE_CVT(ret,name) ret (*name)(...)
# define XSINTERFACE_CVT_ANON(ret) ret (*)(...)
#else
/* In C standards before C23, an empty prototype means that the function takes
* an unspecified number of arguments. */
# define XSINTERFACE_CVT(ret,name) ret (*name)()
# define XSINTERFACE_CVT_ANON(ret) ret (*)()
#endif
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