用于进行gcc测试

				/* { dg-do preprocess } */				/* { dg-options -pedantic-errors } */								#if 'a' != 'a' || '\001' != 1 || '\x12' != 0x12				#error a,1,0x12 /* { dg-bogus "#error" "basic charconst recognition" } */				#endif								#if 'a' != L'a'				#error L'a'	/* { dg-bogus "error" "wide charconst recognition 1" } */				#endif								#if L'\xfeed' != 0xfeed && L'\xfeed' != (0xfeed - 0x10000)				#error 0xfeed	/* { dg-bogus "error" "wide charconst recognition 2" } */				#endif								#if L'\x1234' != 0x1234				#error 0x1234	/* { dg-bogus "error" "wide charconst recognition 3" } */				#endif								/* The 'character constant (is )?too long' message is produced by 16-bit targets.  */				#if 'abcd' /* { dg-warning "(multi-character character constant)|(character constant (is )?too long)" "multi-character charconst" } */				#endif								#if 'abcdefghi' /* { dg-warning "character constant (is )?too long" "charconst too long" } */				#endif								#if '' /* { dg-error "empty character constant" "empty charconst" } */				#endif