[Issue 22652] New: importC: Braceless initializer of nested struct is rejected.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=22652

          Issue ID: 22652
           Summary: importC: Braceless initializer of nested struct is
                    rejected.
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: dave287091 at gmail.com

Consider the following C program:

// s.c
struct S1 {
    int x, y;
};

struct S2 {
    struct S1 s;
};

int printf(const char*, ...);

int main(void){
    int x = {1};
    struct S1 a = {0}; // ok
    struct S2 b = {{0}}; // ok
    struct S2 c = {1}; // Error: cannot implicitly convert expression `1` of
type `int` to `S1`
    struct S2 c2 = {1, 2}; // Error: cannot implicitly convert expression `1`
of type `int` to `S1`
    struct S1 d[2] = {1, 2}; // Error: variable `s.main.d` is not a static and
cannot have static initializer
    struct S1 e[] = {3, 4}; // Error: variable `s.main.e` is not a static and
cannot have static initializer

    printf("%d,%d\n", b.s.x, b.s.y);   // should print 0, 0
    printf("%d,%d\n", c.s.x, c.s.y);   // should print 1, 0
    printf("%d,%d\n", c2.s.x, c2.s.y); // should print 1, 2
    printf("%d,%d\n", d[0].x, d[0].y); // should print 1, 2
    printf("%d,%d\n", d[1].x, d[1].y); // should print 0, 0
    printf("%zu\n", sizeof(e) / sizeof(e[0])); // should print 1
    printf("%d,%d\n", e[0].x, e[0].y); // should print 3, 4
    return 0;
}

C11 does not require braces. Clauses 20 and 21 of 6.7.9 Initialization address
what should be done.

"variable `s.main.d` is not a static and cannot have static initializer” is
also a weird error message in this case.

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