wildcard expansion for D args

[Jay Norwood]

Below is a code fragment I'm using to expand pathname argv args in some 
directory processing code.  Works pretty well.   Basically, I'm allowing 
expansion of just the basename; so strings like these below are expanded into 
expDir[] for each matching path  in the dirname directory, which is determined 
by the shallow spanmode.  The last arg to dirEntries determines whether it 
follows links.  In this case I'm not following them.

c:\dir1\xx* 
c:\dir2\x?d

There is a special dirEntries call that appears to be intended exactly for 
this.  You need to include std.file and std.path


                string[] expDirs; // expanded directories from wildargv 
expansion on arg
                string basename = baseName(arg);
                string dirname = dirName(arg);

                // expand the wildargs for the single level.  Don't follow links
                auto dFiles = 
dirEntries(dirname,basename,SpanMode.shallow,false);
                foreach(d; dFiles){
                        expDirs ~=  d.name;
                }