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comparison gcc/testsuite/g++.dg/ext/attr-warning.C @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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111:04ced10e8804 131:84e7813d76e9
1 // Bug c++/83871 - wrong code due to attributes on distinct template
2 // specializations
3 // Test to verify that an explicit template specifialization does not
4 // "inherit" attribute warning from a primary template declared with
5 // it.
6 // { dg-do compile }
7 // { dg-options "-Wall" }
8
9 struct Special;
10
11 // Primary has no attributes here.
12 template <class T>
13 void fwarn_primary ();
14
15 // Uses of the primary template, including declarations of its
16 // specializations, should not be diagnosed until after it has
17 // been redeclared with attribute warning.
18 template <>
19 void fwarn_primary<Special> ();
20
21 void use_primary_before_warning ()
22 {
23 // Verify that uses of the primary are not diagnosed.
24 fwarn_primary<char>();
25 fwarn_primary<short>();
26 }
27
28 // Redeclare the primary with attribute warning.
29 template <class T>
30 void __attribute__ ((warning ("primary")))
31 fwarn_primary ();
32
33 // Attribute warning is special in that it only warns for functions
34 // that are actually used, not those that are only declared.
35 template <>
36 void fwarn_primary<double> ();
37
38 void use_primary_after_warning ()
39 {
40 // Verify that uses of the redeclared primary are diagnosed.
41 fwarn_primary<int>(); // { dg-warning "primary" }
42 fwarn_primary<long>(); // { dg-warning "primary" }
43 }
44
45 void use_special ()
46 {
47 // Verify that the use of the specializatoin is not diagnosed.
48 fwarn_primary<Special>();
49 }