https://bugs.llvm.org/show_bug.cgi?id=39663
Bug ID: 39663
Summary: Class template argument deduction with deduced type
fails when accessing member
Product: clang
Version: 7.0
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++'17
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected]
Try to compile the following c++ program:
template <class T>
struct C {
C(T) {}
int a;
};
template <class T>
int foo(T v) {
return C{v}.a; // <----
}
int main() {
foo(4);
}
The line marked above fails with the error:
error: member reference base type 'C' is not a structure or union
return (C{v}).a;
~~~~~~^~
Note that the following all work fine:
template <class T>
C<T> foo(T v) {
return C{v};
}
and
int foo(int v) {
return C{v}.a;
}
and
C{4}.a;
I tried this also on a recent trunk build (trunk 346600)
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