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5b6f71b8f6
Not ready for review This is a quite large patch, half of which will be redone following a different approach. Although it improves sugar retention in template argument deduction on its own, this is an enabler for resugaring. This stores the sugared converted template arguments in a TST, in addition to the existing as-written ones, so this is quite wasteful. This is the biggest performance impact on the whole of resugaring so far, although it is hoped the new approach will have negligible impact. This is a continuation of https://reviews.llvm.org/D134113
21 lines
636 B
C++
21 lines
636 B
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 %s
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// FIXME: With deduction changes to better preserve
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// type sugar, the bug that this test case used to
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// expose is harder to reproduce.
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template <class> struct Pair;
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template <class...> struct Tuple {
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template <class _Up> Tuple(_Up);
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};
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template <typename> struct StatusOr;
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template <int> using ElementType = int;
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template <int... fields>
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using Key = Tuple<ElementType<fields>...>;
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template <int... fields>
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StatusOr<Pair<Key<fields...>>> Parser();
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struct Helper { Helper(Tuple<>, Tuple<>, int, int); };
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struct D : Helper {
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D(Key<> f, int n, int e) : Helper(f, Parser<>, n, e) {}
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};
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