%module xxx
/* Divide by zero */
#define ZERO 0
#if 1%ZERO
#endif
#if 2/ZERO
#endif
#if 1%(5-5)
#endif
#if 2/(55-55)
#endif
/* Floating point */
#if 1.2
#endif
#if 2e3
#endif
#if 0
#elif 8.8
#endif
/* Missing whitespace after preproc directive */
#if123
#endif
#if456e
#endif
#if 0
#warning This should not warn
#elif1
#warning This should also not warn
#endif
#if(1)
#warning Warning okay: #if(1)
#endif
/* The SWIG preprocessor support strings with equality/inequality tests.
* Check error cases.
*/
#if "TWO" == 1
#endif
/* This didn't fail prior with SWIG < 4.1. Github #1384. */
#if 1 == ("TWO")
#endif
/* These should all give errors. */
#if "1"
#endif
#if -"1"
#endif
#if "1" == -"-1"
#endif
#if "1" == !"-1"
#endif
#if "1" == ~"1"
#endif
/* Unary + was a no-op and so this didn't give an error in SWIG < 4.1.0. */
#if "1" == +"1"
#endif
/* Spaceship operator doesn't seem to be allowed in preprocessor expressions,
* and isn't valid in C at all.
*/
#if (4 <=> 2) < 0
#endif
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