clang/test/Sema/inline-redef.c

   1 // RUN: %clang_cc1 -std=gnu89 -fsyntax-only -verify %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify %s
   3
   4 #if __STDC_VERSION__ >= 199901
   5 #define GNU_INLINE __attribute((__gnu_inline__))
   6 #else
   7 #define GNU_INLINE
   8 #endif
   9
  10 // PR5253
  11 // rdar://9559708 (same extension in C99 mode)
  12 // GNU Extension: check that we can redefine an extern inline function
  13 GNU_INLINE extern inline int f(int a) {return a;}
  14 int f(int b) {return b;} // expected-note{{previous definition is here}}
  15 // And now check that we can't redefine a normal function
  16 int f(int c) {return c;} // expected-error{{redefinition of 'f'}}
  17
  18 // Check that we can redefine an extern inline function as a static function
  19 GNU_INLINE extern inline int g(int a) {return a;}
  20 static int g(int b) {return b;}
  21
  22 // Check that we ensure the types of the two definitions are the same
  23 GNU_INLINE extern inline int h(int a) {return a;} // expected-note{{previous definition is here}}
  24 int h(short b) {return b;}  // expected-error{{conflicting types for 'h'}}