https://issues.dlang.org/show_bug.cgi?id=13183

          Issue ID: 13183
           Summary: C++ namespace should not conflict with import root
                    package
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: DMD
          Assignee: nobody@puremagic.com
          Reporter: verylonglogin.reg@gmail.com

The fact C++ root namespace conflicts with import root package makes it hard to have same root namespace in C++ codebase.

This code should compile:
---
import abba.m;
extern(C++, abba) { }
---
main.d(2): Error: namespace main.abba conflicts with import main.abba at
main.d(1)
---

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