[libcxx-commits] [PATCH] D60724: [libc++] Make __debug_less::operator() constexpr

[Tom Anderson via Phabricator via libcxx-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL358725: [libc++] Make __debug_less::operator() constexpr (authored by thomasanderson, committed by ).
Herald added a project: LLVM.
Herald added a subscriber: llvm-commits.

Changed prior to commit:
  https://reviews.llvm.org/D60724?vs=195846&id=195847#toc

Repository:
  rL LLVM

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D60724/new/

https://reviews.llvm.org/D60724

Files:
  libcxx/trunk/include/algorithm
  libcxx/trunk/test/libcxx/algorithms/debug_less.pass.cpp


Index: libcxx/trunk/include/algorithm
===================================================================
--- libcxx/trunk/include/algorithm
+++ libcxx/trunk/include/algorithm
@@ -785,6 +785,7 @@
     __debug_less(_Compare& __c) : __comp_(__c) {}
 
     template <class _Tp, class _Up>
+    _LIBCPP_CONSTEXPR_AFTER_CXX17
     bool operator()(const _Tp& __x,  const _Up& __y)
     {
         bool __r = __comp_(__x, __y);
Index: libcxx/trunk/test/libcxx/algorithms/debug_less.pass.cpp
===================================================================
--- libcxx/trunk/test/libcxx/algorithms/debug_less.pass.cpp
+++ libcxx/trunk/test/libcxx/algorithms/debug_less.pass.cpp
@@ -268,6 +268,16 @@
     assert(dl(static_cast<int&&>(1), static_cast<const int&&>(2)));
 }
 
+#if TEST_STD_VER > 17
+constexpr bool test_constexpr() {
+    std::less<> cmp{};
+    __debug_less<std::less<> > dcmp(cmp);
+    assert(dcmp(1, 2));
+    assert(!dcmp(1, 1));
+    return true;
+}
+#endif
+
 int main(int, char**) {
     test_passing();
     test_failing();
@@ -275,5 +285,8 @@
     test_non_const_arg_cmp();
     test_value_iterator();
     test_value_categories();
+#if TEST_STD_VER > 17
+    static_assert(test_constexpr(), "");
+#endif
     return 0;
 }


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