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PR c++/86728 - C variadic generic lambda.
[official-gcc.git]
/
gcc
/
testsuite
/
g++.dg
/
concepts
/
friend2.C
blob
5f14905a738624bcad9bf99686755e62f32e0e87
1
// { dg-options "-std=c++17 -fconcepts" }
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template<typename T>
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concept bool Eq() { return requires(T t) { t == t; }; }
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template<Eq T> struct Foo { };
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template<typename T>
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struct S { // { dg-error "constraint failure" }
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template<Eq U> friend class Bar;
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friend class Foo<T>;
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};
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struct X { };
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int main() {
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S<int> si; // OK
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S<X> sx;
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}