04a69a10f6
Use the template pattern in determining whether to synthesize the aggregate deduction guide, and update DeclareImplicitDeductionGuideFromInitList to substitute outer template arguments. Fixes #77599
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
// RUN: %clang_cc1 -std=c++20 -verify %s
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template<class T> struct S {
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template<class U> struct N {
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N(T) {}
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N(T, U) {}
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template<class V> N(V, U) {}
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};
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};
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S<int>::N x{"a", 1};
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using T = decltype(x);
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using T = S<int>::N<int>;
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template<class X> struct default_ftd_argument {
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template<class Y> struct B {
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template<class W = X, class Z = Y, class V = Z, int I = 0> B(Y);
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};
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};
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default_ftd_argument<int>::B default_arg("a");
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using DefaultArg = decltype(default_arg);
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using DefaultArg = default_ftd_argument<int>::B<const char *>;
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template<bool> struct test;
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template<class X> struct non_type_param {
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template<class Y> struct B {
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B(Y);
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template<class Z, test<Z::value> = 0> B(Z);
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};
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};
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non_type_param<int>::B ntp = 5;
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using NonTypeParam = decltype(ntp);
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using NonTypeParam = non_type_param<int>::B<int>;
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template<typename A, typename T>
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concept C = (sizeof(T) == sizeof(A));
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template<class X> struct concepts {
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template<class Y> struct B {
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template<class K = X, C<K> Z> B(Y, Z);
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};
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};
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concepts<int>::B cc(1, 3);
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using Concepts = decltype(cc);
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using Concepts = concepts<int>::B<int>;
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template<class X> struct requires_clause {
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template<class Y> struct B {
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template<class Z> requires (sizeof(Z) == sizeof(X))
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B(Y, Z);
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};
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};
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requires_clause<int>::B req(1, 2);
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using RC = decltype(req);
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using RC = requires_clause<int>::B<int>;
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template<typename X> struct nested_init_list {
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template<C<X> Y>
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struct B { // #INIT_LIST_INNER
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X x;
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Y y;
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};
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};
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nested_init_list<int>::B nil {1, 2};
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using NIL = decltype(nil);
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using NIL = nested_init_list<int>::B<int>;
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// expected-error@+1 {{no viable constructor or deduction guide for deduction of template arguments of 'B'}}
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nested_init_list<int>::B nil_invalid {1, ""};
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// expected-note@#INIT_LIST_INNER {{candidate template ignored: substitution failure [with Y = const char *]: constraints not satisfied for class template 'B' [with Y = const char *]}}
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// expected-note@#INIT_LIST_INNER {{candidate function template not viable: requires 1 argument, but 2 were provided}}
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// expected-note@#INIT_LIST_INNER {{candidate function template not viable: requires 0 arguments, but 2 were provided}}
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