[Issue 7459] Document the workarounds for mutually-called nested functions.

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=7459

--- Comment #7 from Kenji Hara <k.hara.pg at gmail.com> ---
(In reply to timon.gehr from comment #0)
> d-programming-language.org/function sez:
> 
> Unlike module level declarations, declarations within function scope are
> processed in order. This means that two nested functions cannot mutually
> call each other:
> 
[snip]
>
> The proposed solution is unnecessarily complicated and non-optimal. Since
> nested template functions are instantiated with the state of the symbol
> table of the lexically first instantiation, this is a superior solution:
> 
> void test() {
>     void foo()() { bar(); } // ok
>     void bar()   { foo(); } // ok
> }

In issue 12578, I'm proposing a language behavior to accept the code.

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