clang-format: designated initializer: One member per line

Question

I have a struct in C:

struct A {
    int a;
    int b;
    int c;
}

When initializing the struct clang-format reformats the code as follows:

struct A name = {.a = 1, .b = 2, .c = 3};

How can I tell clang-format to put any member in its own line? Like so:

struct A name = {
    .a = 1,
    .b = 2,
    .c = 3
};

Answer 1

Adding a trailing comma should fix this problem.

struct A name = {
    .a = 1,
    .b = 2,
    .c = 3, // <-- this trailing comma is needed
};