Is there a use for function declarations inside functions?

Question

We can declare functions inside functions (I wanted a local variable, but it parses as a function declaration):

struct bvalue;
struct bdict {
    bd         


        

Answer 1

It's useful if you need to use an external function whose name would conflict with an internal (static) function or variable in the current translation unit (source file). For instance (silly but it gets the point across):

static int read(int x)
{
    return bar(x);
}

static int foo()
{
    ssize_t read(int, void *, size_t);
    read(0, buf, 1);
}