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974c8b7e2f
This adds support for rewriting <, >, <=, and >= to a normal or reversed call to operator<=>, for rewriting != to a normal or reversed call to operator==, and for rewriting <=> and == to reversed forms of those same operators. Note that this is a breaking change for various C++17 code patterns, including some in use in LLVM. The most common patterns (where an operator== becomes ambiguous with a reversed form of itself) are still accepted under this patch, as an extension (with a warning). I'm hopeful that we can get the language rules fixed before C++20 ships, and the extension warning is aimed primarily at providing data to inform that decision. llvm-svn: 375306
12 lines
347 B
C++
12 lines
347 B
C++
// RUN: %clang_cc1 -emit-llvm %s -o - -triple=x86_64-linux-gnu -std=c++2a | FileCheck %s
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namespace spaceship {
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struct X {};
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struct Y {};
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int operator<=>(X, Y);
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// CHECK-LABEL: define {{.*}} @_ZN9spaceship1fIiEEvDTcmltcvNS_1YE_EcvNS_1XE_EcvT__EE
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template<typename T> void f(decltype(Y() < X(), T()) x) {}
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template void f<int>(int);
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}
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