[Issue 10411] New: Private aliases introduce conflicts and cause bad diagnostics

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10411

           Summary: Private aliases introduce conflicts and cause bad
                    diagnostics
           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: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2013-06-18 20:07:08 PDT ---
-----
module foo;

private
{
    import std.stdio;
    alias println = writeln;
}
-----

-----
module bar;

void println(string file = __FILE__, size_t line = __LINE__, Args...)(Args
args)
{
}
-----

-----
module main;

import foo;
import bar;

void main()
{
    println("");
}
-----

$ C:\dev\code\d_code\conflict>dmd main.d
> DMD v2.064 DEBUG
> main.d(8): Error: bar.println!("main.d", 8u, string).println at bar.d(3) 
> conflicts with std.stdio.writeln!(string).writeln at C:\dmd-git\dmd2\windows
> \bin\..\..\src\phobos\std\stdio.d(1728)

Note how a *private* alias in 'foo' ends up causing a conflict in the importing
module, and also note the horrible diagnostic: it doesn't tell us which module
caused the conflict ('foo' is not mentioned anywhere).

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