1 // RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98 -fexceptions -fcxx-exceptions -pedantic-errors -ast-dump | FileCheck %s --check-prefixes CXX98
2 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
3 // RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
4 // RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
5 // RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
6 // RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
7 // RUN: %clang_cc1 -std=c++2c -triple x86_64-unknown-unknown %s -verify=expected,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
8
9 #if __cplusplus == 199711L
10 #define static_assert(...) __extension__ _Static_assert(__VA_ARGS__)
11 // cxx98-error@-1 {{variadic macros are a C99 feature}}
12 #endif
13
14 namespace cwg2149 { // cwg2149: 3.1
15 #if __cplusplus <= 201103L
16 struct X { int i, j, k; };
17 #else
18 struct X { int i, j, k = 42; };
19 #endif
20
21 template<int N>
22 void f1(const X(&)[N]); // #cwg2149-f1
23
24 template<int N>
25 void f2(const X(&)[N][2]); // #cwg2149-f2
26
f()27 void f() {
28 X a[] = { 1, 2, 3, 4, 5, 6 };
29 static_assert(sizeof(a) / sizeof(X) == 2, "");
30 X b[2] = { { 1, 2, 3 }, { 4, 5, 6 } };
31 X c[][2] = { 1, 2, 3, 4, 5, 6 };
32 static_assert(sizeof(c) / sizeof(X[2]) == 1, "");
33
34 #if __cplusplus >= 201103L
35 constexpr X ca[] = { 1, 2, 3, 4, 5, 6 };
36 constexpr X cb[2] = { { 1, 2, 3 }, { 4, 5, 6 } };
37 static_assert(ca[0].i == cb[0].i, "");
38 static_assert(ca[0].j == cb[0].j, "");
39 static_assert(ca[0].k == cb[0].k, "");
40 static_assert(ca[1].i == cb[1].i, "");
41 static_assert(ca[1].j == cb[1].j, "");
42 static_assert(ca[1].k == cb[1].k, "");
43
44 f1({ 1, 2, 3, 4, 5, 6 });
45 // since-cxx11-error@-1 {{no matching function for call to 'f1'}}
46 // since-cxx11-note@#cwg2149-f1 {{candidate function [with N = 6] not viable: no known conversion from 'int' to 'const X' for 1st argument}}
47 f2({ 1, 2, 3, 4, 5, 6 });
48 // since-cxx11-error@-1 {{no matching function for call to 'f2'}}
49 // since-cxx11-note@#cwg2149-f2 {{candidate function [with N = 6] not viable: no known conversion from 'int' to 'const X[2]' for 1st argument}}
50 #endif
51 }
52 } // namespace cwg2149
53
54 // Constant evaluation is not powerful enough in 98 mode to check for equality
55 // via static_assert, even with constant folding enabled.
56
57 // CXX98: VarDecl {{.+}} a 'X[2]'
58 // CXX98-NEXT: `-InitListExpr {{.+}} 'X[2]'
59 // CXX98-NEXT: |-InitListExpr {{.+}} 'X':'cwg2149::X'
60 // CXX98-NEXT: | |-IntegerLiteral {{.+}} 'int' 1
61 // CXX98-NEXT: | |-IntegerLiteral {{.+}} 'int' 2
62 // CXX98-NEXT: | `-IntegerLiteral {{.+}} 'int' 3
63 // CXX98-NEXT: `-InitListExpr {{.+}} 'X':'cwg2149::X'
64 // CXX98-NEXT: |-IntegerLiteral {{.+}} 'int' 4
65 // CXX98-NEXT: |-IntegerLiteral {{.+}} 'int' 5
66 // CXX98-NEXT: `-IntegerLiteral {{.+}} 'int' 6
67
68 // CXX98: VarDecl {{.+}} b 'X[2]'
69 // CXX98-NEXT: `-InitListExpr {{.+}} 'X[2]'
70 // CXX98-NEXT: |-InitListExpr {{.+}} 'X':'cwg2149::X'
71 // CXX98-NEXT: | |-IntegerLiteral {{.+}} 'int' 1
72 // CXX98-NEXT: | |-IntegerLiteral {{.+}} 'int' 2
73 // CXX98-NEXT: | `-IntegerLiteral {{.+}} 'int' 3
74 // CXX98-NEXT: `-InitListExpr {{.+}} 'X':'cwg2149::X'
75 // CXX98-NEXT: |-IntegerLiteral {{.+}} 'int' 4
76 // CXX98-NEXT: |-IntegerLiteral {{.+}} 'int' 5
77 // CXX98-NEXT: `-IntegerLiteral {{.+}} 'int' 6
78