tokens.h

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#pragma once
 
#define tokconcat(x, y)         _tokconcat_actual(x, y)
#define _tokconcat_actual(x, y) x##y
 
#define tokcat2(x, y) _tokconcat_actual(x, y)
 
#define tokcat3(x1, x2, x3) tokcat2(tokcat2(x1, x2), x3)
 
#define tokcat4(x1, x2, x3, x4) tokcat2(tokcat3(x1, x2, x3), x4)
 
#define tokcat5(x1, x2, x3, x4, x5) tokcat2(tokcat4(x1, x2, x3, x4), x5)
 
#define tokconcatU(x, y)         _tokconcatU_actual(x, y)
#define _tokconcatU_actual(x, y) x##_##y
 
#define tokcatU2(x, y) _tokconcatU_actual(x, y)
 
#define tokcatU3(x1, x2, x3) tokcatU2(tokcatU2(x1, x2), x3)
 
#define tokcatU4(x1, x2, x3, x4) tokcatU2(tokcatU3(x1, x2, x3), x4)
 
#define tokcatU5(x1, x2, x3, x4, x5) tokcatU2(tokcatU4(x1, x2, x3, x4), x5)
 
#define tokstring(x)         _tokstring_actual(x)
#define _tokstring_actual(x) #x
 
#define tokeval(...) __VA_ARGS__