xref: /llvm-project/clang/test/Lexer/bitint-constants-compat.c (revision ca1f1c957232b05d6529916bcd769ae1c57ff935) 
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 
func(void)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 }
24