Mercurial > hg > CbC > CbC_gcc
comparison gcc/testsuite/gcc.dg/cpp/macsyntx2.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
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date | Thu, 25 Oct 2018 07:37:49 +0900 |
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111:04ced10e8804 | 131:84e7813d76e9 |
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1 /* Copyright (C) 2000-2017 Free Software Foundation, Inc. */ | |
2 | |
3 /* { dg-do preprocess } */ | |
4 /* { dg-options "-pedantic -std=c99" } */ | |
5 | |
6 /* Tests macro syntax, for both definition and invocation, including:- | |
7 | |
8 o Full range of macro definition semantics. | |
9 o No. of arguments supplied to function-like macros. | |
10 o Odd GNU rest args behavior. | |
11 o Macro arguments do not flow into the rest of the file. */ | |
12 | |
13 | |
14 /* Test basic macro definition syntax. The macros are all called | |
15 "foo" deliberately to provoke an (excess) redefinition warning in | |
16 case the macros succeed in being entered in the macro hash table | |
17 despite being an error. | |
18 | |
19 Split a couple of the lines to check that the errors appear on the | |
20 right line (i.e. are associated with the correct token). */ | |
21 | |
22 #define ; /* { dg-error "identifier" } */ | |
23 #define SEMI; /* { dg-warning "space" } */ | |
24 #define foo(X /* { dg-error "expected" } */ | |
25 #define foo\ | |
26 (X,) /* { dg-error "parameter name" } */ | |
27 #define foo(, X) /* { dg-error "parameter name" } */ | |
28 #define foo(X, X) /* { dg-error "duplicate" } */ | |
29 #define foo(X Y) /* { dg-error "expected" } */ | |
30 #define foo(() /* { dg-error "parameter name" } */ | |
31 #define foo(..., X) /* { dg-error "expected" } */ | |
32 #define foo \ | |
33 __VA_ARGS__ /* { dg-warning "__VA_ARGS__" } */ | |
34 #define goo(__VA_ARGS__) /* { dg-warning "__VA_ARGS__" } */ | |
35 #define hoo(...) __VA_ARGS__ /* OK. */ | |
36 #define __VA_ARGS__ /* { dg-warning "__VA_ARGS__" } */ | |
37 __VA_ARGS__ /* { dg-warning "__VA_ARGS__" } */ | |
38 | |
39 /* test # of supplied arguments. */ | |
40 #define none() | |
41 #define one(x) | |
42 #define two(x, y) | |
43 #define var0(...) | |
44 #define var1(x, ...) | |
45 none() /* OK. */ | |
46 none(ichi) /* { dg-error "passed 1" } */ | |
47 one() /* OK. */ | |
48 one(ichi) /* OK. */ | |
49 one(ichi\ | |
50 , ni) /* { dg-error "passed 2" } */ | |
51 two(ichi) /* { dg-error "requires 2" } */ | |
52 var0() /* OK. */ | |
53 var0(ichi) /* OK. */ | |
54 var1() /* { dg-warning "requires at least one" } */ | |
55 var1(ichi) /* { dg-warning "requires at least one" } */ | |
56 var1(ichi, ni) /* OK. */ | |
57 | |
58 /* This tests two oddities of GNU rest args - omitting a comma is OK, | |
59 and backtracking a token on pasting an empty rest args. */ | |
60 #define rest(x, y...) x ## y /* { dg-warning "ISO C" } */ | |
61 rest(ichi,) /* OK. */ | |
62 rest(ichi) /* { dg-warning "requires at least one" } */ | |
63 #if 23 != rest(2, 3) /* OK, no warning. */ | |
64 #error 23 != 23 !! | |
65 #endif | |
66 | |
67 /* Test that we don't allow arguments to flow into the rest of the | |
68 file. */ | |
69 #define half_invocation do_nowt(2 | |
70 #define do_nowt(x) x | |
71 half_invocation ) /* OK. */ | |
72 do_nowt (half_invocation)) /* { dg-error "unterminated argument" } */ |