Removed Void as a concept

entity/expression.go

@@ -365,7 +365,7 @@ type Break struct {
 }
 func (*Break) expression(){}
 func (*Break) statement(){}
-func (this *Break) Type () Type { return &TypeVoid { } }
+func (this *Break) Type () Type { return nil }
 func (this *Break) String () string {
 	if this.Value == nil {
 		return "[break]"
@@ -388,7 +388,7 @@ type Return struct {
 }
 func (*Return) expression(){}
 func (*Return) statement(){}
-func (this *Return) Type () Type { return &TypeVoid { } }
+func (this *Return) Type () Type { return nil }
 func (this *Return) String () string {
 	if this.Value == nil {
 		return "[return]"

entity/type.go

@@ -11,15 +11,6 @@ type Type interface {
 	ty ()
 }
 
-// TypeVoid represents the absence of a type.
-type TypeVoid struct { }
-func (*TypeVoid) ty(){}
-func (*TypeVoid) Equals (ty Type) bool {
-	_, equals := ty.(*TypeVoid)
-	return equals
-}
-func (*TypeVoid) String () string { return "Void" }
-
 // TypeNamed refers to a user-defined or built in named type.
 type TypeNamed struct {
 	Pos lexer.Position