5fbe21a774
This implements p2085, allowing out-of-class defaulting of comparison
operators, primarily so they need not be inline, IIUC intent. this was
mostly straigh forward, but required reimplementing
Sema::CheckExplicitlyDefaultedComparison, as now there's a case where
we have no a priori clue as to what class a defaulted comparison may
be for. We have to inspect the parameter types to find out. Eg:
class X { ... };
bool operator==(X, X) = default;
Thus reimplemented the parameter type checking, and added 'is this a
friend' functionality for the above case.
Reviewed By: mizvekov
Differential Revision: https://reviews.llvm.org/D104478
39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
// RUN: %clang_cc1 --std=c++20 %s -emit-llvm -o - -triple x86_64-linux | FileCheck %s
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namespace std {
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struct strong_ordering {
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int n;
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constexpr operator int() const { return n; }
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static const strong_ordering equal, greater, less;
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};
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constexpr inline strong_ordering strong_ordering::equal = {0};
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constexpr inline strong_ordering strong_ordering::greater = {1};
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constexpr inline strong_ordering strong_ordering::less = {-1};
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} // namespace std
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struct Space {
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int i, j;
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std::strong_ordering operator<=>(Space const &other) const;
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bool operator==(Space const &other) const;
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};
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// Make sure these cause emission
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std::strong_ordering Space::operator<=>(Space const &other) const = default;
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// CHECK-LABEL: define{{.*}} @_ZNK5SpacessERKS_
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bool Space::operator==(Space const &) const = default;
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// CHECK-LABEL: define{{.*}} @_ZNK5SpaceeqERKS_
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struct Water {
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int i, j;
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std::strong_ordering operator<=>(Water const &other) const;
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bool operator==(Water const &other) const;
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};
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// Make sure these do not cause emission
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inline std::strong_ordering Water::operator<=>(Water const &other) const = default;
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// CHECK-NOT: define{{.*}} @_ZNK5WaterssERKS_
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inline bool Water::operator==(Water const &) const = default;
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// CHECK-NOT: define{{.*}} @_ZNK5WatereqERKS_
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