llvm-project/clang/test/Sema/pointer-subtract-compat.c

// RUN: clang-cc %s -fsyntax-only -verify -pedantic

typedef const char rchar;
int a(char* a, rchar* b) {
  return a-b;
}

// <rdar://problem/6520707> 
void f0(void (*fp)(void)) {
  int x = fp - fp; // expected-warning{{arithmetic on pointer to function type 'void (*)(void)' is a GNU extension}}
}
Rename clang to clang-cc. Tests and drivers updated, still need to shuffle dirs. llvm-svn: 67602 2009-03-24 02:24:46 +00:00			`// RUN: clang-cc %s -fsyntax-only -verify -pedantic`
Make sure to take the unqualified versions of the canonical types for type-checking pointer subtraction; if the canonical types aren't used, the qualifiers won't always get stripped off correctly. llvm-svn: 55620 2008-09-02 05:09:35 +00:00
			`typedef const char rchar;`
			`int a(char* a, rchar* b) {`
			`return a-b;`
			`}`
Allow subtraction of function pointer types in C, as a GNU extension. Fixes rdar://problem/6520707 llvm-svn: 62859 2009-01-23 19:03:35 +00:00
			`// <rdar://problem/6520707>`
			`void f0(void (*fp)(void)) {`
			`int x = fp - fp; // expected-warning{{arithmetic on pointer to function type 'void (*)(void)' is a GNU extension}}`
			`}`