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954ccee5d5
This fixes partial ordering of pack expansions of NTTPs, by procedding with the check using the pattern of the NTTP through the rules of the non-pack case. This also unifies almost all of the different versions of FinishTemplateArgumentDeduction (except the function template case). This makes sure they all follow the rules consistently, instantiating the parameters and comparing those with the argument. Fixes #132562
50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
// RUN: %clang_cc1 -std=c++26 %s -verify
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namespace hana_enable_if_idiom {
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template<bool> struct A {};
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template<typename, typename = A<true>> struct B;
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template<typename T, bool N> struct B<T, A<N>> {};
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template<typename T> struct B<T, A<T::value>> {};
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struct C {
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static const bool value = true;
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};
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B<C> b;
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}
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namespace GH132562 {
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struct I {
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int v = 0;
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};
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namespace t1 {
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template <I... X> struct A;
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template <I... X>
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requires ((X.v == 0) ||...)
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struct A<X...>;
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} // namespace t1
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namespace t2 {
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template <I... X> struct A; // expected-note {{template is declared here}}
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template <int... X> struct A<X...>;
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// expected-error@-1 {{is not more specialized than the primary template}}
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// expected-note@-2 {{no viable conversion from 'int' to 'I'}}
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template <int... X> struct B; // expected-note {{template is declared here}}
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template <I... X> struct B<X...>;
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// expected-error@-1 {{is not more specialized than the primary template}}
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// expected-note@-2 {{value of type 'const I' is not implicitly convertible to 'int'}}
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} // namespace t2
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namespace t3 {
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struct J {
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int v = 0;
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constexpr J(int v) : v(v) {}
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};
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template <J... X> struct A;
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template <int... X> struct A<X...>;
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template <int... X> struct B; // expected-note {{template is declared here}}
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template <J... X> struct B<X...>;
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// expected-error@-1 {{is not more specialized than the primary template}}
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// expected-note@-2 {{value of type 'const J' is not implicitly convertible to 'int'}}
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} // namespace t3
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} // namespace GH132562
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