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#define MIN_VERSION_base(x,y,z) (x>=4) && (y>=9) && (z>=0)
This file tests the #if boolean expression parser/evaluator.
#if !MIN_VERSION_base(4, 7, 0)
SUCCEED with not and no parens
#endif
#if !(MIN_VERSION_base(4, 7, 0))
SUCCEED with not and parens
#endif
Then we check for arithmetic.
#define AT_LEAST_4(x) ((x)>=4)
#if AT_LEAST_4(2+3)
simple ARITHMETIC works
#else
simple ARITHMETIC broken
#endif
#if 2+3 > 4 && 1+12*2*1+2 == 27
complex ARITHMETIC works
#else
complex ARITHMETIC broken
#endif
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