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- #pragma once
- #warning "these defines break if statements with multiple parameters to templates"
- #define if1(statement) if(statement)
- #define if2(condition, false) ([&](auto&& value) -> decltype(condition) { \
- return (bool)value ? value : (decltype(condition))false; \
- })(condition)
- #define if3(condition, true, false) ((condition) ? (true) : (decltype(true))(false))
- #define if4(type, condition, true, false) ((condition) ? (type)(true) : (type)(false))
- #define if_(_1, _2, _3, _4, name, ...) name
- #define if(...) if_(__VA_ARGS__, if4, if3, if2, if1)(__VA_ARGS__)
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