https://bugs.llvm.org/show_bug.cgi?id=41165
Bug ID: 41165
Summary: invalid error: reference to local variable 'xxx'
declared in enclosing lambda
Product: clang
Version: 7.0
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: C++'17
Assignee: unassignedclangb...@nondot.org
Reporter: jonathan.poe...@gmail.com
CC: blitzrak...@gmail.com, erik.pilking...@gmail.com,
llvm-bugs@lists.llvm.org, richard-l...@metafoo.co.uk
template<class... Ts>
void foo(Ts... xs)
{
[&](auto&... lhs){
[&](auto&... rhs){
((lhs = rhs), ...);
}(xs...);
}(xs...);
}
int main()
{
foo(1);
}
test.cpp:6:15: error: reference to local variable 'lhs' declared in enclosing
lambda expression
((lhs = rhs), ...);
^
If lhs is captured explicitly, there is no error, but a warning:
test.cpp:5:11: warning: lambda capture 'lhs' is not used
[-Wunused-lambda-capture]
[&lhs...](auto&... rhs){
^
(Works with GCC and MSVC)
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