clang/test/Lexer/bitint-constants-compat.c

   1 // RUN: %clang_cc1 -std=c17 -fsyntax-only -verify=ext -Wno-unused %s
   2 // RUN: %clang_cc1 -std=c2x -fsyntax-only -verify=compat -Wpre-c2x-compat -Wno-unused %s
   3 // RUN: %clang_cc1 -fsyntax-only -verify=cpp -Wbit-int-extension -Wno-unused -x c++ %s
   4
   5 #if 18446744073709551615uwb // ext-warning {{'_BitInt' suffix for literals is a C23 extension}} \
   6                                compat-warning {{'_BitInt' suffix for literals is incompatible with C standards before C23}} \
   7                                cpp-error {{invalid suffix 'uwb' on integer constant}}
   8 #endif
   9
  10 #if 18446744073709551615__uwb // ext-error {{invalid suffix '__uwb' on integer constant}} \
  11                                compat-error {{invalid suffix '__uwb' on integer constant}} \
  12                                cpp-warning {{'_BitInt' suffix for literals is a Clang extension}}
  13 #endif
  14
  15 void func(void) {
  16   18446744073709551615wb; // ext-warning {{'_BitInt' suffix for literals is a C23 extension}} \
  17                              compat-warning {{'_BitInt' suffix for literals is incompatible with C standards before C23}} \
  18                              cpp-error {{invalid suffix 'wb' on integer constant}}
  19
  20   18446744073709551615__wb; // ext-error {{invalid suffix '__wb' on integer constant}} \
  21                              compat-error {{invalid suffix '__wb' on integer constant}} \
  22                              cpp-warning {{'_BitInt' suffix for literals is a Clang extension}}
  23 }