a good stab at array anf hash constants

lib/ast/compound_expressions.rb

@@ -0,0 +1,39 @@
+module Ast
+
+  class ArrayExpression < Expression
+    attr_reader :values
+    def initialize vals
+      @values = vals
+    end
+    def inspect
+      self.class.name + ".new(" + values.to_s+ ")"
+    end
+    def compile context
+      to.do
+    end
+    def attributes
+      [:values]
+    end
+  end
+  class AssociationExpression < Expression
+    attr_reader :key , :value
+    def initialize key , value
+      @key , @value = key , value
+    end
+    def inspect
+      self.class.name + ".new(" + key.inspect + " , " + value.inspect + ")"
+    end
+    def compile context
+      to.do
+    end
+    def attributes
+      [:key , :value]
+    end
+
+  end
+  class HashExpression < ArrayExpression
+    def compile context
+      to.do
+    end
+  end
+end

lib/ast/expression.rb

@@ -15,9 +15,6 @@ module Ast
     def compile context
       raise "abstract #{self}"
     end
-    def inspectt
-      self.class.name + ".new(" + self.attributes.collect{|m| self.send(m).inspect }.join( ",") +")"
-    end
     def attributes
       raise "abstract #{self}"
     end
@@ -36,6 +33,7 @@ module Ast
 end
 
 require_relative "basic_expressions"
+require_relative "compound_expressions"
 require_relative "conditional_expression"
 require_relative "while_expression"
 require_relative "function_expression"