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// PR c++/67147
// { dg-do compile { target c++20 } }
template <class F, class I1, class I2 = I1>
concept IndirectCallableRelation = true;
template <class, class, class = void>
constexpr bool indirect_relation() { return false; }
// FIXME: The original bug was found using the introducer syntax.
template<typename F, typename I1>
requires IndirectCallableRelation<F, I1>
constexpr bool indirect_relation() { return true; }
template<typename F, typename I1, typename I2>
requires IndirectCallableRelation<F, I1, I2>
constexpr bool indirect_relation() { return true; }
// This was added to the discussion thread as a minimum repro.
template<typename T, int = sizeof(T)>
concept C1 = true;
template <C1 T> int test();
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