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/* Copyright (C) 2000 Free Software Foundation, Inc.  */

/* { dg-do preprocess } */

/* Tests behavior of the defined operator.  */

/*  Source: Neil Booth, 29 Oct 2000, Zack Weinberg 11 Dec 2000.  */

#define defined                 /* { dg-error "defined" } */

/* No diagnostics, though you could argue there should be.  */

#if defined defined

#error defined is defined!

#endif

#define is_Z_defined defined Z

#if defined Z

#error Z is not defined

#endif

/* The behavior of "defined" when it comes from a macro expansion is

   now documented.  */

#if is_Z_defined

#error Macro expanding into defined operator test 1

#endif

#define Z

#if !defined Z

#error Z is defined

#endif

#if !is_Z_defined

#error Macro expanding into defined operator test 2

#endif

#undef is_Z_defined

#undef Z

/* Do all the tests over again with the () form of defined.  */

/* No diagnostics, though you could argue there should be.  */

#if defined(defined)

#error defined is defined!

#endif

#define is_Z_defined defined ( Z )

#if defined(Z)

#error Z is not defined

#endif

/* The behavior of "defined" when it comes from a macro expansion is

   now documented.  */

#if is_Z_defined

#error Macro expanding into defined operator test 1

#endif

#define Z

#if !defined(Z)

#error Z is defined

#endif

#if !is_Z_defined

#error Macro expanding into defined operator test 2

#endif

/* Use of defined in different contexts.  */

#define bad1 defined

#if !bad1 Z                     /* { dg-warning "may not be portable" } */

#error Z is defined

#endif 

#if !bad1 (Z)                   /* { dg-warning "may not be portable" } */

#error Z is defined

#endif 

#define bad2 defined (Z

#if !bad2)                      /* { dg-warning "may not be portable" } */

#error Z is defined

#endif