mirror of
https://github.com/paboyle/Grid.git
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79 lines
3.2 KiB
C
79 lines
3.2 KiB
C
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#ifndef GRID_MACRO_MAGIC_H
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#define GRID_MACRO_MAGIC_H
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#define strong_inline __attribute__((always_inline)) inline
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#ifndef MAX
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#define MAX(x,y) ((x)>(y)?(x):(y))
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#define MIN(x,y) ((x)>(y)?(y):(x))
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#endif
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#define GRID_MACRO_FIRST(a, ...) a
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#define GRID_MACRO_SECOND(a, b, ...) b
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#define GRID_MACRO_EMPTY()
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#define GRID_MACRO_EVAL(...) GRID_MACRO_EVAL1024(__VA_ARGS__)
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#define GRID_MACRO_EVAL1024(...) GRID_MACRO_EVAL512(GRID_MACRO_EVAL512(__VA_ARGS__))
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#define GRID_MACRO_EVAL512(...) GRID_MACRO_EVAL256(GRID_MACRO_EVAL256(__VA_ARGS__))
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#define GRID_MACRO_EVAL256(...) GRID_MACRO_EVAL128(GRID_MACRO_EVAL128(__VA_ARGS__))
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#define GRID_MACRO_EVAL128(...) GRID_MACRO_EVAL64(GRID_MACRO_EVAL64(__VA_ARGS__))
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#define GRID_MACRO_EVAL64(...) GRID_MACRO_EVAL32(GRID_MACRO_EVAL32(__VA_ARGS__))
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#define GRID_MACRO_EVAL32(...) GRID_MACRO_EVAL16(GRID_MACRO_EVAL16(__VA_ARGS__))
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#define GRID_MACRO_EVAL16(...) GRID_MACRO_EVAL8(GRID_MACRO_EVAL8(__VA_ARGS__))
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#define GRID_MACRO_EVAL8(...) GRID_MACRO_EVAL4(GRID_MACRO_EVAL4(__VA_ARGS__))
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#define GRID_MACRO_EVAL4(...) GRID_MACRO_EVAL2(GRID_MACRO_EVAL2(__VA_ARGS__))
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#define GRID_MACRO_EVAL2(...) GRID_MACRO_EVAL1(GRID_MACRO_EVAL1(__VA_ARGS__))
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#define GRID_MACRO_EVAL1(...) __VA_ARGS__
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#define GRID_MACRO_DEFER1(m) m GRID_MACRO_EMPTY()
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#define GRID_MACRO_DEFER2(m) m GRID_MACRO_EMPTY GRID_MACRO_EMPTY()()
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#define GRID_MACRO_DEFER3(m) m GRID_MACRO_EMPTY GRID_MACRO_EMPTY GRID_MACRO_EMPTY()()()
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#define GRID_MACRO_DEFER4(m) m GRID_MACRO_EMPTY GRID_MACRO_EMPTY GRID_MACRO_EMPTY GRID_MACRO_EMPTY()()()()
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#define GRID_MACRO_IS_PROBE(...) GRID_MACRO_SECOND(__VA_ARGS__, 0)
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#define GRID_MACRO_PROBE() ~, 1
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#define GRID_MACRO_CAT(a,b) a ## b
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#define GRID_MACRO_NOT(x) GRID_MACRO_IS_PROBE(GRID_MACRO_CAT(_GRID_MACRO_NOT_, x))
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#define _GRID_MACRO_NOT_0 GRID_MACRO_PROBE()
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#define GRID_MACRO_BOOL(x) GRID_MACRO_NOT(GRID_MACRO_NOT(x))
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#define GRID_MACRO_IF_ELSE(condition) _GRID_MACRO_IF_ELSE(GRID_MACRO_BOOL(condition))
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#define _GRID_MACRO_IF_ELSE(condition) GRID_MACRO_CAT(_GRID_MACRO_IF_, condition)
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#define _GRID_MACRO_IF_1(...) __VA_ARGS__ _GRID_MACRO_IF_1_ELSE
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#define _GRID_MACRO_IF_0(...) _GRID_MACRO_IF_0_ELSE
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#define _GRID_MACRO_IF_1_ELSE(...)
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#define _GRID_MACRO_IF_0_ELSE(...) __VA_ARGS__
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#define GRID_MACRO_HAS_ARGS(...) GRID_MACRO_BOOL(GRID_MACRO_FIRST(_GRID_MACRO_END_OF_ARGUMENTS_ __VA_ARGS__)())
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#define _GRID_MACRO_END_OF_ARGUMENTS_() 0
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#define GRID_MACRO_MAP(m, first, second, ...) \
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m(first,second) \
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GRID_MACRO_IF_ELSE(GRID_MACRO_HAS_ARGS(__VA_ARGS__))( \
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GRID_MACRO_DEFER4(_GRID_MACRO_MAP)()(m, __VA_ARGS__) \
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)( \
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/* Do nothing, just terminate */ \
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)
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#define _GRID_MACRO_MAP() GRID_MACRO_MAP
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#define GRID_MACRO_MEMBER(A,B) A B;
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#define GRID_MACRO_OS_WRITE_MEMBER(A,B) os<< #A <<" "#B <<" = "<< obj. B <<" ; " <<std::endl;
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#define GRID_DECL_CLASS_MEMBERS(cname,...) \
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GRID_MACRO_EVAL(GRID_MACRO_MAP(GRID_MACRO_MEMBER,__VA_ARGS__)) \
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friend std::ostream & operator << (std::ostream &os, const cname &obj ) { \
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os<<"class "<<#cname<<" {"<<std::endl;\
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GRID_MACRO_EVAL(GRID_MACRO_MAP(GRID_MACRO_OS_WRITE_MEMBER,__VA_ARGS__)) \
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os<<"}"; \
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return os;\
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};
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#endif
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