Make unreachable code dimmed #12902

Feature Request

When using #if preprocessor directive with undefined symbol, whole code block is rendered as dimmed in vscode.

#if 0
int test() // whole code block is dimmed
{
    return 1;
}
#endif

Is it possible to make same effect for unreachable code?
In this case, lines bellow return could be dimmed as unreachable code.

int test1()
{
    return 1;
    int k = 10; // make this dimmed
}

This would prevent situations there we update unreachable code and don't see results after compilation.