https://llvm.org/bugs/show_bug.cgi?id=31168
Bug ID: 31168
Summary: Relational operators for
std::experimental::optional<T>
Product: libc++
Version: 3.9
Hardware: All
OS: All
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: arthur.j.odw...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Classification: Unclassified
Created attachment 17652
--> https://llvm.org/bugs/attachment.cgi?id=17652&action=edit
Patch for optional<T> relational operators
N4606 requires that optional<T>::operator> be implemented in terms of
T::operator>, but right now libc++'s optional<T>::operator> is (incorrectly)
implemented in terms of T::operator< with the operands flipped.
This is important for types T that have only incomplete orderings: (x < y) may
not imply (y > x).
I've attached a patch that I think suffices to fix the issue, but I don't have
commit privileges.
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