More tree changes

parser/accessors.go

@@ -169,18 +169,6 @@ func (phrase Phrase) Kind () (kind PhraseKind) {
 	return
 }
 
-// ArgumentsLength returns the amount of arguments in the phrase.
-func (phrase Phrase) ArgumentsLength () (length int) {
-	length = len(phrase.arguments)
-	return
-}
-
-// Argument returns the argument at index.
-func (phrase Phrase) Argument (index int) (argument Argument) {
-	argument = phrase.arguments[index]
-	return
-}
-
 // ReturneesLength returns the amount of things the phrase returns to.
 func (phrase Phrase) ReturneesLength () (length int) {
 	length = len(phrase.returnees)

parser/node-traits.go

@@ -43,7 +43,7 @@ type typeable struct {
 
 // Type returns the type of the node.
 func (trait typeable) Type () (what Type) {
-	what =  trait.what
+	what = trait.what
 	return
 }
 
@@ -60,17 +60,28 @@ func (trait permissionable) Permission () (permission types.Permission) {
 
 // valuable allows a node to have an argument value.
 type valuable struct {
+	value Argument
+}
+
+// Value returns the value argument of the node.
+func (trait valuable) Value () (value Argument) {
+	value = trait.value
+	return
+}
+
+// multiValuable allows a node to have several argument values.
+type multiValuable struct {
 	values []Argument
 }
 
-// Length returns the amount of default values in the node.
-func (node valuable) Length () (length int) {
-	length = len(node.values)
-	return
-} 
-
-// Value returns the default value at the specified index.
-func (node valuable) Value (index int) (value Argument) {
-	value = node.values[index]
+// Value returns the value at index.
+func (trait multiValuable) Value (index int) (value Argument) {
+	value = trait.values[index]
+	return
+}
+
+// Length returns the amount of values in the mode.
+func (trait multiValuable) Length () (length int) {
+	length = len(trait.values)
 	return
 }

parser/tree.go

@@ -82,6 +82,12 @@ type Declaration struct {
 	typeable
 }
 
+// List represents an array or object literal.
+type List struct {
+	locatable
+	multiValuable
+}
+
 // ArgumentKind specifies the type of thing the value of an argument should be
 // cast to.
 type ArgumentKind int
@@ -94,6 +100,9 @@ const (
 	// etc...
 	ArgumentKindPhrase
 
+	// (argument argument argument)
+	ArgumentKindList
+
 	// {name}
 	ArgumentKindDereference
 	
@@ -221,8 +230,8 @@ const (
 type Phrase struct {
 	location  file.Location
 	command   Argument
-	arguments []Argument
 	returnees []Argument
+	multiValuable
 
 	kind PhraseKind