Function signature as string

[Neia Neutuladh]

On Thu, 29 Nov 2018 21:11:06 +0000, John Chapman wrote:
> Is there any way to get a string representing a function's exact
> signature as declared in the source? I can generate it myself using
> reflection but it might not be 100% verbatim so wanted to know if
> there's anything built in?
> 
>    foreach (m; __traits(allMembers, T)) {
>      alias member = __traits(getMember, T, m);
>      string signature = // Call some function to get "member"'s
> signature as a string
>    }

typeof(&func).stringof should do it:

    void bar(string s, ref Foo!int i) {}
    void main()
    {
        writeln(typeof(&bar).stringof);
    }

prints: void function(string s, ref Foo!int i)