"Error: Undefined identifier" when moving import to another module

[Joakim via Digitalmars-d-learn]

On Sunday, 19 October 2014 at 09:39:05 UTC, nrgyzer wrote:
> Hi guys,
>
> when I do the following:
>
> module myMain;
>
> import example;
> import std.traits;
> import my.static.library.binding;
>
> static this()
> {
>    foreach ( m; __traits(allMembers, example) )
>    {
>       static if ( isCallable!(mixing(m) )
>       {
>          // ... do something here
>       }
>    }
> }
>
> void main() { /* do something here */ }
>
> And my example-module looks like:
>
> module example;
>
> void exmapleFunction()
> {
>    // do something here
> }
>
> I can compile my application without any error, BUT when I move 
> the import of "my.static.library.binding" to the example-module:
>
> module example;
>
> import my.static.library.binding;
>
> void exmapleFunction()
> {
>    // do something here
> }
>
> ... I'm getting many error messages like these:
>
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D12TypeInfo_xAa6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D49TypeInfo_xAS3std8typecons16__T5TupleTkTkTkZ5Tuple6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D75TypeInfo_xAS3std3uni38__T13InversionListTS3std3uni8GcPolicyZ13InversionList6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D55TypeInfo_xAE3std5regex15__T6ParserTAyaZ6Parser8Operator6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D31TypeInfo_xAS3std5regex8Bytecode6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D110TypeInfo_xAS3std3uni152__T4TrieTS3std3uni20__T9BitPackedTbVmi1Z9BitPackedTwVmi1114112TS3std3uni23__T9sliceBitsVmi8Vmi21Z9sliceBitsTS3std3uni22__T9sliceBitsVmi0Vmi8Z9sliceBitsZ4Trie6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D45TypeInfo_xS3std5regex14__T7ShiftOrTaZ7ShiftOr6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D11TypeInfo_xw6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D11TypeInfo_xb6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D13TypeInfo_xAya6__initZ
> myMain.d-mixin-11(11): Error: undefined identifier 
> _D41TypeInfo_xS3std5regex12__T5StackTkZ5Stack6__initZ
>
> I'm having no idea what's going wrong here. I'm simply moving 
> the import from the file where my main() is located in to the 
> example-module. When removing the import of 
> "my.static.library.binding" in the example-module allows me to 
> successfully compile everything. But I need the import in the 
> example-module. Any suggestions what's going wrong here/how I 
> can solve the error?

An import is private by default:

http://dlang.org/module.html

When you move the import of my.static.library.binding to the 
"example" module, its declarations are no longer available in the 
"myMain" module.  You'd have to make it a "public import 
my.static.library.binding" to make it available to other modules.