https://bugs.llvm.org/show_bug.cgi?id=35073
Bug ID: 35073
Summary: Unexpected -Wunused-value with -std=c++17
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: stephan.bergmann.second...@googlemail.com
CC: llvm-bugs@lists.llvm.org
At least with recent Clang trunk towards 6.0:
> $ cat test.cc
> struct B {};
> struct Ref { Ref(B *); };
> struct D: B { operator Ref() { return this; } };
> void f() { Ref(*new D); }
>
> $ clang++ -std=c++14 -fsyntax-only test.cc
>
> $ clang++ -std=c++17 -fsyntax-only test.cc
> test.cc:4:12: warning: expression result unused [-Wunused-value]
> void f() { Ref(*new D); }
> ^ ~~~~~~
> 1 warning generated.
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