From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Sun, 7 Jan 2018 22:03:44 +0000 (+0000)
Subject: Add tests for three-way self- and array comparison.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=14e7dfb47e5e419c5415992caf7cf7514e970d1e;p=clang

Add tests for three-way self- and array comparison.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@321973 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/test/SemaCXX/compare-cxx2a.cpp b/test/SemaCXX/compare-cxx2a.cpp
index 61d35021cc..d88e3bae41 100644
--- a/test/SemaCXX/compare-cxx2a.cpp
+++ b/test/SemaCXX/compare-cxx2a.cpp
@@ -3,6 +3,14 @@
 
 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -pedantic -verify -Wsign-compare -std=c++2a %s
 
+void self_compare() {
+  int a;
+  int b[3], c[3];
+  (void)(a <=> a); // expected-warning {{self-comparison always evaluates to 'std::strong_ordering::equal'}}
+  (void)(b <=> b); // expected-warning {{self-comparison always evaluates to 'std::strong_ordering::equal'}}
+  (void)(b <=> c); // expected-warning {{array comparison always evaluates to a constant}}
+}
+
 void test0(long a, unsigned long b) {
   enum EnumA {A};
   enum EnumB {B};