[llvm-bugs] [Bug 52299] New: lambda in unevaluated-context is parsed incorrectedly

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Oct 25 14:52:36 PDT 2021


            Bug ID: 52299
           Summary: lambda in unevaluated-context is parsed incorrectedly
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++2b
          Assignee: unassignedclangbugs at nondot.org
          Reporter: nickhuang99 at hotmail.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

The following code is accepted incorrectly by clang while GCC and MSVC++ all
spot the failure of assertion. The type of "foo<int>" is obviously NOT "void"
at all.

template<class T>
void foo(decltype(+[](T){}) lambda, T param);

static_assert(__is_same(decltype(foo<int>), void));

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