[llvm-bugs] [Bug 47694] New: C++20 Designated Initializers - Nested initialization

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=47694

            Bug ID: 47694
           Summary: C++20 Designated Initializers - Nested initialization
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++2a
          Assignee: unassignedclangbugs at nondot.org
          Reporter: cai at synopsys.com
                CC: blitzrakete at gmail.com, erik.pilkington at gmail.com,
                    llvm-bugs at lists.llvm.org, richard-llvm at metafoo.co.uk

Hi, 

This code snippet is taken from P0329R4.

struct A
{
    int x;
};

struct B
{
    A a;
};

int main()
{
    B b{.a.x = 0};
    return 0;
}

GCC fails to compile this example, which should be invalid according to the
C++20 standard.

GCC error:
error: expected primary-expression before '.' token

   13 |     B b{.a.x = 0};

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