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- //
- // macro.h
- // iterator
- //
- // Created by Sam Jaffe on 4/1/23.
- // Copyright © 2023 Sam Jaffe. All rights reserved.
- //
- #ifndef _ITERATOR_MACRO_H
- #define _ITERATOR_MACRO_H
- #define FWD(x) std::forward<decltype(x)>(x)
- #define REQUIRES_T(trait, rval, ...) std::enable_if_t<trait, rval>
- #define REQUIRES(trait) typename = REQUIRES_T(trait, void)
- #define SFINAE(trait) template <bool _ = true, REQUIRES(trait && _)>
- #define VAL(X) std::declval<X>()
- #define DEREF_TYPE(X) decltype(*VAL(X))
- #define TYPE(X, EXPR) decltype(VAL(X).EXPR)
- #define EXISTS(EXPR) std::void_t<decltype(EXPR)>
- #define DEFER(TYPE) (std::is_void_v<TYPE> || true)
- #endif
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