Make sure compare handle boolean-testable correctly

hewillk · web-flow · commit cc53c5452a92 · 2025-03-24T01:22:21.000+08:00
diff --git a/libcxx/include/__flat_set/flat_set.h b/libcxx/include/__flat_set/flat_set.h
@@ -602,7 +602,7 @@ class flat_set {
 
 private:
   _LIBCPP_HIDE_FROM_ABI bool __is_sorted_and_unique(auto&& __key_container) const {
-    auto __greater_or_equal_to = [this](const auto& __x, const auto& __y) { return !__compare_(__x, __y); };
+    auto __greater_or_equal_to = [this](const auto& __x, const auto& __y) -> bool { return !__compare_(__x, __y); };
     return ranges::adjacent_find(__key_container, __greater_or_equal_to) == ranges::end(__key_container);
   }
 

Original file line number	Diff line number	Diff line change
`@@ -602,7 +602,7 @@ class flat_set {`
`602`	`602`
`603`	`603`	`private:`
`604`	`604`	`_LIBCPP_HIDE_FROM_ABI bool __is_sorted_and_unique(auto&& __key_container) const {`
`605`		`- auto __greater_or_equal_to = [this](const auto& __x, const auto& __y) { return !__compare_(__x, __y); };`
	`605`	`+ auto __greater_or_equal_to = [this](const auto& __x, const auto& __y) -> bool { return !__compare_(__x, __y); };`
`606`	`606`	`return ranges::adjacent_find(__key_container, __greater_or_equal_to) == ranges::end(__key_container);`
`607`	`607`	`}`
`608`	`608`