www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - [Issue 6318] New: module isn't fully processed under weird conditions

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6318

           Summary: module isn't fully processed under weird conditions
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: mrmocool gmx.de


--- Comment #0 from Trass3r <mrmocool gmx.de> 2011-07-14 10:47:22 PDT ---
One of the weirdest bugs I've ever encountered.
Set up a directory named 'basic'. Inside there 3 files:

module basic.Messages;

//import basic.utils; // for flattenNamedEnum

pragma(msg, "foo");

enum Severity
{
    NOTE,
}
pragma(msg, flattenNamedEnum!Severity);

pragma(msg, "bar");
// definition of enum Msg is normally mixed in here

====

module basic.Bar;

import basic.Handle;
import basic.Messages;

class Bar
{
public:
    enum Level
    {
        Ignored,
    }
    void bla(Msg msg)
    {
    }
}

====

module basic.Handle;

import basic.Bar;

void foo(Bar.Level level)
{
}

I compiled it from inside the folder with 'dmd -c -I.. Bar.d Handle.d'

Bar.d(13): Error: undefined identifier Msg
foo

Note how basic.Messages is only evaluated to a certain degree.


The same happens with
dmd -c -I.. Bar.d Handle.d Messages.d
dmd -c -I.. Bar.d Messages.d Handle.d

Only with 'dmd -c -I.. Handle.d Bar.d' it yields
foo
../basic/Messages.d(14): Error: template instance template 'flattenNamedEnum'
is not defined
__error
bar
Bar.d(16): Error: undefined identifier Msg

And with 'dmd -c -I.. Messages.d Bar.d Handle.d':
foo
Messages.d(14): Error: template instance template 'flattenNamedEnum' is not
defined
__error
bar
Bar.d(16): Error: undefined identifier Msg


Also note that adding the definition of Msg by hand like
enum Msg { f }
or commenting out the flattenNamedEnum mixin also shows similar results.

Can anyone confirm this?

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Jul 14 2011
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6318



--- Comment #1 from Trass3r <mrmocool gmx.de> 2011-07-14 16:09:47 PDT ---
Well, if ever needed, here's basic.utils:

//! bring named enum members into current scope
string flattenNamedEnum(EnumType)()
if (is (EnumType == enum))
{
    string s = "";
    foreach (i, e; __traits(allMembers, EnumType))
    {
        s ~= "alias " ~ EnumType.stringof ~ "." ~ __traits(allMembers,
EnumType)[i] ~ " " ~ __traits(allMembers, EnumType)[i] ~ ";\n";
    }

    return s;
}


Pulling enum Level out of Bar also seems to 'resolve' this.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Jul 14 2011
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6318



--- Comment #2 from Trass3r <mrmocool gmx.de> 2011-07-15 05:00:51 PDT ---
And for completeness the Msg generation from basic.Messages:

private immutable records =
[
    ["bla",        "blub"],
];


mixin (generateMsgEnum());
private string generateMsgEnum()
{
    string res = " enum Msg : string\n{\n";

    foreach (msg; .messageRecords)
        res ~= "    " ~ msg[0] ~ " = `" ~ msg[1] ~ "`,\n";

    res ~= "}\n";
    return res;
}

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Jul 15 2011
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6318



--- Comment #3 from Trass3r <mrmocool gmx.de> 2011-07-15 05:11:03 PDT ---
If this has to do with dmd exiting early because of errors, why is there no
"fatal error: too many errors occured"?

If it has to do with the cyclic import, why is Messages affected by that? In
the import graph it is a sink (or source, depending on how you define the
directions).
(Of course utils will be the sink if you include it, but that doesn't change
much)

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
Jul 15 2011