[Issue 9578] New: "is a nested function and cannot be accessed from" problem

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=9578

           Summary: "is a nested function and cannot be accessed from"
                    problem
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: verylonglogin.reg at gmail.com


--- Comment #0 from Denis Shelomovskij <verylonglogin.reg at gmail.com> 2013-02-23 20:51:20 MSK ---
The following code compiles fine if `t.tf` is not templated:
---
template t(alias f)
{
    void tf()() { f(); }
}

void g(alias f)()
{
    f(); // Error: function main.h.t!(m).tf!().tf is a nested function and
cannot be accessed from main.g!(tf).g
}

void h()
{
    int i = 0;
    int m() { return i; }
    g!(t!m.tf)();
}
---

As a result `std.functional.not` and `std.algorithm.all` (as it uses `not`)
don't work for nested predicates.

Also see Issue 8693.

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