Extended dir Pattern

Function Rec($path){
    if($path[-1] -eq '/' -or $path[-1] -eq '\'){
        $path += '**'
    }
    $rec = $path -split '**', 0, 'simplematch'
    if($rec.length -gt 1){ #recursive
        dir -r $rec[0] | ?{ !($_.PSIsContainer) -and ($_.FullName -like ($rec -join '*')) } | %{ $_.FullName }
    } else { #non-recursive
        dir $rec[0] | ?{ !$_.PSIsContainer } | %{ $_.FullName }
    }
}

Rec("C:\test\**\sub2\*.sml")
#C:\test\sub0\sub3\sub2\set.sml
#C:\test\sub0\sub3\sub2\vector3.sml
#C:\test\sub1\sub2\set.sml
#C:\test\sub1\sub2\vector3.sml