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dcb8911316
Explicit specialization doesn't increase depth of template parameters,
so need to be careful when gathering template parameters for
instantiation.
For the case:
```
template<typename T>
struct X {
struct impl;
};
template <>
struct X<int>::impl {
template<int ct>
int f() { return ct; };
};
```
instantiation of `f` used to crash because type template parameter
`int` of explicit specialization was taken into account, but non-type
template parameter `ct` had zero depth and index so wrong parameter
ended up inside of a wrong handler.
Fixes https://github.com/llvm/llvm-project/issues/61159
Reviewed By: aaron.ballman, shafik
Differential Revision: https://reviews.llvm.org/D155705
40 lines
811 B
C++
40 lines
811 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++20 %s
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// expected-no-diagnostics
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namespace GH61159 {
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template <typename T> struct X {
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struct I;
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};
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template <> struct X<int>::I {
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template <int ct> constexpr int f() { return ct; };
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int data = 3;
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};
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template <typename T> struct X<T>::I {
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template <T ct> constexpr T f() { return ct + 1; };
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T data = 7;
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};
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static_assert(X<int>::I{}.f<17>() == 17);
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static_assert(X<int>::I{}.data == 3);
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static_assert(X<short>::I{}.data == 7);
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static_assert(X<short>::I{}.f<18>() == 19);
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template <typename T> struct Y {
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struct I;
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};
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template <> struct Y<int> {
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struct I {
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template <int ct> constexpr int f() { return ct; };
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int data = 3;
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};
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};
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static_assert(Y<int>::I{}.f<17>() == 17);
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static_assert(Y<int>::I{}.data == 3);
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} // namespace GH61159
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