xref: /aosp_15_r20/external/clang/test/Modules/Inputs/cxx-templates-a.h (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li @import cxx_templates_common;
2*67e74705SXin Li 
f()3*67e74705SXin Li template<typename T> T f() { return T(); }
4*67e74705SXin Li template<typename T> T f(T);
5*67e74705SXin Li namespace N {
f()6*67e74705SXin Li   template<typename T> T f() { return T(); }
7*67e74705SXin Li   template<typename T> T f(T);
8*67e74705SXin Li }
9*67e74705SXin Li 
10*67e74705SXin Li template<int N> int template_param_kinds_1();
11*67e74705SXin Li template<template<typename T, int, int> class> int template_param_kinds_2();
12*67e74705SXin Li template<template<typename T, typename U, T> class> int template_param_kinds_3();
13*67e74705SXin Li 
14*67e74705SXin Li template<typename T> struct SomeTemplate<T*>;
15*67e74705SXin Li template<typename T> struct SomeTemplate<T*> {};
16*67e74705SXin Li typedef SomeTemplate<int*> SomeTemplateIntPtr;
17*67e74705SXin Li 
18*67e74705SXin Li template<typename T> void PerformDelayedLookup(T &t) {
19*67e74705SXin Li   t.f();
20*67e74705SXin Li   typename T::Inner inner;
21*67e74705SXin Li   FoundByADL(t);
22*67e74705SXin Li }
23*67e74705SXin Li 
24*67e74705SXin Li template<typename T> void PerformDelayedLookupInDefaultArgument(T &t, int a = (FoundByADL(T()), 0)) {}
25*67e74705SXin Li 
26*67e74705SXin Li template<typename T> struct RedeclaredAsFriend {};
27*67e74705SXin Li 
28*67e74705SXin Li void use_some_template_a() {
29*67e74705SXin Li   SomeTemplate<char[2]> a;
30*67e74705SXin Li   SomeTemplate<char[1]> b, c;
31*67e74705SXin Li   b = c;
32*67e74705SXin Li 
33*67e74705SXin Li   (void)&WithImplicitSpecialMembers<int>::n;
34*67e74705SXin Li }
35*67e74705SXin Li 
36*67e74705SXin Li template<int> struct MergeTemplates;
37*67e74705SXin Li MergeTemplates<0> *merge_templates_a;
38*67e74705SXin Li 
39*67e74705SXin Li auto enum_a_from_a = CommonTemplate<int>::a;
40*67e74705SXin Li const auto enum_c_from_a = CommonTemplate<int>::c;
41*67e74705SXin Li 
42*67e74705SXin Li template<int> struct UseInt;
43*67e74705SXin Li template<typename T> void UseRedeclaredEnum(UseInt<T() + CommonTemplate<char>::a>);
44*67e74705SXin Li constexpr void (*UseRedeclaredEnumA)(UseInt<1>) = UseRedeclaredEnum<int>;
45*67e74705SXin Li 
46*67e74705SXin Li template<typename> struct MergeSpecializations;
47*67e74705SXin Li template<typename T> struct MergeSpecializations<T*> {
48*67e74705SXin Li   typedef int partially_specialized_in_a;
49*67e74705SXin Li };
50*67e74705SXin Li template<> struct MergeSpecializations<char> {
51*67e74705SXin Li   typedef int explicitly_specialized_in_a;
52*67e74705SXin Li };
53*67e74705SXin Li 
54*67e74705SXin Li void InstantiateWithFriend(Std::WithFriend<int> wfi) {}
55*67e74705SXin Li 
56*67e74705SXin Li template<typename T> struct WithPartialSpecialization<T*> {
57*67e74705SXin Li   typedef int type;
58*67e74705SXin Li   T &f() { static T t; return t; }
59*67e74705SXin Li };
60*67e74705SXin Li typedef WithPartialSpecializationUse::type WithPartialSpecializationInstantiate;
61*67e74705SXin Li typedef WithPartialSpecialization<void(int)>::type WithPartialSpecializationInstantiate2;
62*67e74705SXin Li 
63*67e74705SXin Li template<> struct WithExplicitSpecialization<int> {
64*67e74705SXin Li   int n;
65*67e74705SXin Li   template<typename T> T &inner_template() {
66*67e74705SXin Li     return n;
67*67e74705SXin Li   }
68*67e74705SXin Li };
69*67e74705SXin Li 
70*67e74705SXin Li template<typename T> template<typename U>
71*67e74705SXin Li constexpr int Outer<T>::Inner<U>::f() { return 1; }
72*67e74705SXin Li static_assert(Outer<int>::Inner<int>::f() == 1, "");
73*67e74705SXin Li 
74*67e74705SXin Li template<typename T> struct MergeTemplateDefinitions {
75*67e74705SXin Li   static constexpr int f();
76*67e74705SXin Li   static constexpr int g();
77*67e74705SXin Li };
78*67e74705SXin Li template<typename T> constexpr int MergeTemplateDefinitions<T>::f() { return 1; }
79*67e74705SXin Li 
80*67e74705SXin Li template<typename T> using AliasTemplate = T;
81*67e74705SXin Li 
82*67e74705SXin Li template<typename T> struct PartiallyInstantiatePartialSpec {};
83*67e74705SXin Li template<typename T> struct PartiallyInstantiatePartialSpec<T*> {
84*67e74705SXin Li   static T *foo() { return reinterpret_cast<T*>(0); }
85*67e74705SXin Li   static T *bar() { return reinterpret_cast<T*>(0); }
86*67e74705SXin Li };
87*67e74705SXin Li typedef PartiallyInstantiatePartialSpec<int*> PartiallyInstantiatePartialSpecHelper;
88*67e74705SXin Li 
89*67e74705SXin Li void InstantiateWithAliasTemplate(WithAliasTemplate<int>::X<char>);
90*67e74705SXin Li inline int InstantiateWithAnonymousDeclsA(WithAnonymousDecls<int> x) { return (x.k ? x.a : x.b) + (x.k ? x.s.c : x.s.d) + x.e; }
91*67e74705SXin Li inline int InstantiateWithAnonymousDeclsB2(WithAnonymousDecls<char> x);
92*67e74705SXin Li 
93*67e74705SXin Li 
94*67e74705SXin Li template<typename T1 = int>
95*67e74705SXin Li struct MergeAnonUnionMember {
96*67e74705SXin Li   MergeAnonUnionMember() { (void)values.t1; }
97*67e74705SXin Li   union { int t1; } values;
98*67e74705SXin Li };
99*67e74705SXin Li inline MergeAnonUnionMember<> maum_a() { return {}; }
100*67e74705SXin Li 
101*67e74705SXin Li template<typename T> struct DontWalkPreviousDeclAfterMerging { struct Inner { typedef T type; }; };
102*67e74705SXin Li 
103*67e74705SXin Li namespace TestInjectedClassName {
104*67e74705SXin Li   template<typename T> struct X { X(); };
105*67e74705SXin Li   typedef X<char[1]> A;
106*67e74705SXin Li }
107