David Blaikie | 5f31f08 | 2011-10-18 05:54:07 +0000 | [diff] [blame] | 1 | // RUN: %clang_cc1 -fsyntax-only -verify -pedantic -Wc++11-compat %s |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 2 | // |
| 3 | // Tests explicit instantiation of templates. |
| 4 | template<typename T, typename U = T> class X0 { }; |
| 5 | |
| 6 | namespace N { |
| 7 | template<typename T, typename U = T> class X1 { }; |
| 8 | } |
| 9 | |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 10 | // Check the syntax of explicit instantiations. |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 11 | template class X0<int, float>; |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 12 | template class X0<int>; // expected-note{{previous}} |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 13 | |
| 14 | template class N::X1<int>; |
| 15 | template class ::N::X1<int, float>; |
| 16 | |
| 17 | using namespace N; |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 18 | |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 19 | // Check for some bogus syntax that probably means that the user |
| 20 | // wanted to write an explicit specialization, but forgot the '<>' |
| 21 | // after 'template'. |
Douglas Gregor | 4d9a16f | 2009-05-12 23:25:50 +0000 | [diff] [blame] | 22 | template class X0<double> { }; // expected-error{{explicit specialization}} |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 23 | |
| 24 | // Check for explicit instantiations that come after other kinds of |
| 25 | // instantiations or declarations. |
Douglas Gregor | ff66803 | 2009-05-13 18:28:20 +0000 | [diff] [blame] | 26 | template class X0<int, int>; // expected-error{{duplicate}} |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 27 | |
| 28 | template<> class X0<char> { }; // expected-note{{previous}} |
Douglas Gregor | ff66803 | 2009-05-13 18:28:20 +0000 | [diff] [blame] | 29 | template class X0<char>; // expected-warning{{ignored}} |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 30 | |
Douglas Gregor | ff66803 | 2009-05-13 18:28:20 +0000 | [diff] [blame] | 31 | void foo(X0<short>) { } |
| 32 | template class X0<short>; |
Douglas Gregor | 93dfdb1 | 2009-05-13 00:25:59 +0000 | [diff] [blame] | 33 | |
| 34 | // Check that explicit instantiations actually produce definitions. We |
| 35 | // determine whether this happens by placing semantic errors in the |
| 36 | // definition of the template we're instantiating. |
| 37 | template<typename T> struct X2; // expected-note{{declared here}} |
| 38 | |
| 39 | template struct X2<float>; // expected-error{{undefined template}} |
| 40 | |
| 41 | template<typename T> |
| 42 | struct X2 { |
| 43 | void f0(T*); // expected-error{{pointer to a reference}} |
| 44 | }; |
| 45 | |
| 46 | template struct X2<int>; // okay |
| 47 | template struct X2<int&>; // expected-note{{in instantiation of}} |
Douglas Gregor | a58861f | 2009-05-13 20:28:22 +0000 | [diff] [blame] | 48 | |
| 49 | // Check that explicit instantiations instantiate member classes. |
| 50 | template<typename T> struct X3 { |
Douglas Gregor | f3e7ce4 | 2009-05-18 17:01:57 +0000 | [diff] [blame] | 51 | struct Inner { |
Douglas Gregor | a58861f | 2009-05-13 20:28:22 +0000 | [diff] [blame] | 52 | void f(T*); // expected-error{{pointer to a reference}} |
| 53 | }; |
| 54 | }; |
| 55 | |
| 56 | void f1(X3<int&>); // okay, Inner, not instantiated |
| 57 | |
| 58 | template struct X3<int&>; // expected-note{{instantiation}} |
| 59 | |
| 60 | template<typename T> struct X4 { |
Douglas Gregor | f3e7ce4 | 2009-05-18 17:01:57 +0000 | [diff] [blame] | 61 | struct Inner { |
| 62 | struct VeryInner { |
Douglas Gregor | a58861f | 2009-05-13 20:28:22 +0000 | [diff] [blame] | 63 | void f(T*); // expected-error 2{{pointer to a reference}} |
| 64 | }; |
| 65 | }; |
| 66 | }; |
| 67 | |
| 68 | void f2(X4<int&>); // okay, Inner, not instantiated |
| 69 | void f3(X4<int&>::Inner); // okay, Inner::VeryInner, not instantiated |
| 70 | |
| 71 | template struct X4<int&>; // expected-note{{instantiation}} |
| 72 | template struct X4<float&>; // expected-note{{instantiation}} |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 73 | |
| 74 | // Check explicit instantiation of member classes |
| 75 | namespace N2 { |
| 76 | |
| 77 | template<typename T> |
| 78 | struct X5 { |
| 79 | struct Inner1 { |
| 80 | void f(T&); |
| 81 | }; |
| 82 | |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 83 | struct Inner2 { // expected-note {{here}} |
Douglas Gregor | f3e7ce4 | 2009-05-18 17:01:57 +0000 | [diff] [blame] | 84 | struct VeryInner { |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 85 | void g(T*); // expected-error 2{{pointer to a reference}} |
| 86 | }; |
| 87 | }; |
| 88 | }; |
| 89 | |
| 90 | } |
| 91 | |
| 92 | template struct N2::X5<void>::Inner2; |
| 93 | |
| 94 | using namespace N2; |
| 95 | template struct X5<int&>::Inner2; // expected-note{{instantiation}} |
| 96 | |
| 97 | void f4(X5<float&>::Inner2); |
| 98 | template struct X5<float&>::Inner2; // expected-note{{instantiation}} |
| 99 | |
| 100 | namespace N3 { |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 101 | template struct N2::X5<int>::Inner2; // expected-warning {{explicit instantiation of 'Inner2' not in a namespace enclosing 'N2'}} |
Douglas Gregor | 3f5b61c | 2009-05-14 00:28:11 +0000 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | struct X6 { |
| 105 | struct Inner { // expected-note{{here}} |
| 106 | void f(); |
| 107 | }; |
| 108 | }; |
| 109 | |
| 110 | template struct X6::Inner; // expected-error{{non-templated}} |
Douglas Gregor | 3ebd753 | 2009-11-23 12:11:45 +0000 | [diff] [blame] | 111 | |
| 112 | // PR5559 |
| 113 | template <typename T> |
| 114 | struct Foo; |
| 115 | |
| 116 | template <> |
| 117 | struct Foo<int> // expected-note{{header not required for explicitly-specialized}} |
| 118 | { |
| 119 | template <typename U> |
| 120 | struct Bar |
| 121 | {}; |
| 122 | }; |
| 123 | |
| 124 | template <> // expected-warning{{extraneous template parameter list}} |
| 125 | template <> |
| 126 | struct Foo<int>::Bar<void> |
| 127 | {}; |
Douglas Gregor | 2166beb | 2010-05-11 17:39:34 +0000 | [diff] [blame] | 128 | |
| 129 | namespace N1 { |
| 130 | |
| 131 | template<typename T> struct X7 { }; // expected-note{{here}} |
| 132 | |
| 133 | namespace Inner { |
| 134 | template<typename T> struct X8 { }; |
| 135 | } |
| 136 | |
| 137 | template struct X7<int>; |
| 138 | template struct Inner::X8<int>; |
| 139 | } |
| 140 | |
| 141 | template<typename T> struct X9 { }; // expected-note{{here}} |
| 142 | |
| 143 | template struct ::N1::Inner::X8<float>; |
| 144 | |
| 145 | namespace N2 { |
| 146 | using namespace N1; |
| 147 | |
| 148 | template struct X7<double>; // expected-warning{{must occur in namespace}} |
| 149 | |
Richard Smith | 3e2e91e | 2011-10-18 02:28:33 +0000 | [diff] [blame] | 150 | template struct X9<float>; // expected-warning{{must occur at global scope}} |
Douglas Gregor | 2166beb | 2010-05-11 17:39:34 +0000 | [diff] [blame] | 151 | } |