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#ifndef RUNE_INTERNAL_QMACROS_H
#define RUNE_INTERNAL_QMACROS_H
/* Macros for qualifier-preserving functions. These are wrappers around some
functions declared above which will return a const-qualified pointer if the
input string is const-qualified, and a non-const-qualified pointer otherwise.
The macros are taken from the N3020 proposal for C23. */
/* clang-format off */
#define _RUNE_PTR_IS_CONST(P) \
_Generic(1 ? (P) : (void *)(P), \
const void *: 1, \
default: 0)
#define _RUNE_STATIC_IF(P, T, E) \
_Generic(&(char[!!(P) + 1]){0}, \
char(*)[2]: T, \
char(*)[1]: E)
#define _RUNE_Q_PTR(F, S, ...) \
_RUNE_STATIC_IF(_RUNE_PTR_IS_CONST((S)), \
(const char8_t *)(F)(__VA_ARGS__), \
( char8_t *)(F)(__VA_ARGS__))
/* clang-format on */
#endif /* !RUNE_INTERNAL_QMACROS_H */
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