ParameterAst. Adding .ParameterNames (re #305)

Author: James Brundage

Types/ParameterAST/Alias.psd1

@@ -8,4 +8,5 @@
     ValueFromPipeline = "FromPipeline"
     ValueFromRemainingArguments = "FromUnbound"
     ValueFromRemaining = "FromUnbound"
+    Aliases = "ParameterNames"
 }

Types/ParameterAST/get_ParameterNames.ps1

@@ -0,0 +1,18 @@
+@(foreach ($attr in $this.Attributes) {
+    $reflectedType = $attr.TypeName.GetReflectionType()
+    if ($reflectedType -ne [Alias]) {        
+        continue
+    }
+    
+    foreach ($positionalParameter in $attr.PositionalArguments) {
+        $positionalParameter.Value
+    }
+
+    foreach ($namedArgument in $attr.NamedArguments) {
+        if ($namedArgument.ArgumentName -eq 'AliasNames') {
+            $namedArgument.Argument.Value
+        }
+    }    
+}
+
+$this.Name.VariablePath.ToString())