move ast to tree, remove seperate helper file

lib/typed/tree/assignment.rb

@@ -0,0 +1,14 @@
+module Typed
+  module Tree
+    class Assignment < Statement
+      attr_accessor :name , :value
+      def initialize(n = nil , v = nil )
+        @name , @value = n , v
+      end
+    end
+
+    class FieldDef < Statement
+      attr_accessor :name , :type , :value
+    end
+  end
+end

lib/typed/tree/basic_values.rb

@@ -0,0 +1,41 @@
+module Typed
+  module Tree
+    class IntegerExpression < Expression
+      attr_accessor :value
+      def initialize(value)
+        @value = value
+      end
+    end
+    class FloatExpression < Expression
+      attr_accessor :value
+      def initialize(value)
+        @value = value
+      end
+    end
+    class TrueExpression < Expression
+    end
+    class FalseExpression < Expression
+    end
+    class NilExpression < Expression
+    end
+    class StringExpression < Expression
+      attr_accessor :value
+      def initialize(value)
+        @value = value
+      end
+    end
+    class NameExpression < Expression
+      attr_accessor :value
+      alias :name :value
+      def initialize(value)
+        @value = value
+      end
+    end
+    class ClassExpression < Expression
+      attr_accessor :value
+      def initialize(value)
+        @value = value
+      end
+    end
+  end
+end

lib/typed/tree/call_site.rb

@@ -0,0 +1,7 @@
+module Typed
+  module Tree
+    class CallSite < Expression
+      attr_accessor :name , :receiver , :arguments
+    end
+  end
+end

lib/typed/tree/class_statement.rb

@@ -0,0 +1,11 @@
+module Typed
+  module Tree
+    class ClassStatement < Statement
+      attr_accessor :name , :derives , :statements
+    end
+
+    class ClassField < Statement
+      attr_accessor :name , :type
+    end
+  end
+end

lib/typed/tree/field_access.rb

@@ -0,0 +1,5 @@
+module Typed
+  class FieldAccess < Expression
+    attr_accessor :receiver , :field
+  end
+end

lib/typed/tree/function_statement.rb

@@ -0,0 +1,7 @@
+module Typed
+  module Tree
+    class FunctionStatement < Statement
+      attr_accessor :return_type , :name , :parameters, :statements , :receiver
+    end
+  end
+end

lib/typed/tree/if_statement.rb

@@ -0,0 +1,7 @@
+module Typed
+  module Tree
+    class IfStatement < Statement
+      attr_accessor :branch_type , :condition , :if_true , :if_false
+    end
+  end
+end

lib/typed/tree/operator_expression.rb

@@ -0,0 +1,5 @@
+module Typed
+  class OperatorExpression < Expression
+    attr_accessor :operator , :left_expression , :right_expression
+  end
+end

lib/typed/tree/return_statement.rb

@@ -0,0 +1,5 @@
+module Typed
+  class ReturnStatement < Statement
+    attr_accessor :return_value
+  end
+end

lib/typed/tree/statements.rb

@@ -0,0 +1,5 @@
+module Typed
+  class Statements < Statement
+    attr_accessor :statements
+  end
+end

lib/typed/tree/to_code.rb

@@ -0,0 +1,163 @@
+module Typed
+
+  def self.ast_to_code statement
+    compiler = ToCode.new
+    compiler.process statement
+  end
+
+  class ToCode < AST::Processor
+
+    def handler_missing node
+      raise "No handler  on_#{node.type}(node)"
+    end
+
+    def on_class statement
+      name , derives , statements = *statement
+      w = Tree::ClassStatement.new()
+      w.name = name
+      w.derives = derives.children.first
+      w.statements = process(statements)
+      w
+    end
+
+    def on_function  statement
+      return_type , name , parameters, statements , receiver = *statement
+      w = Tree::FunctionStatement.new()
+      w.return_type = return_type
+      w.name = name.children.first
+      w.parameters = parameters.to_a.collect do |p|
+        raise "error, argument must be a identifier, not #{p}" unless p.type == :parameter
+        p.children
+      end
+      w.statements = process(statements)
+      w.receiver = receiver
+      w
+    end
+
+    def on_field_def statement
+      type , name , value = *statement
+      w = FieldDef.new()
+      w.type = type
+      w.name = process(name)
+      w.value = process(value) if value
+      w
+    end
+
+    def on_class_field statement
+      type , name = *statement
+      w = ClassField.new()
+      w.type = type
+      w.name = name
+      w
+    end
+
+    def on_while_statement statement
+      branch_type , condition , statements = *statement
+      w = WhileStatement.new()
+      w.branch_type = branch_type
+      w.condition = process(condition)
+      w.statements = process(statements)
+      w
+    end
+
+    def on_if_statement statement
+      branch_type , condition , if_true , if_false = *statement
+      w = Tree::IfStatement.new()
+      w.branch_type = branch_type
+      w.condition = process(condition)
+      w.if_true = process(if_true)
+      w.if_false = process(if_false)
+      w
+    end
+
+    def process_first code
+      raise "Too many children #{code.inspect}" if code.children.length != 1
+      process code.children.first
+    end
+    alias  :on_conditional :process_first
+    alias  :on_condition :process_first
+    alias  :on_field :process_first
+
+    def on_statements statement
+      w = Statements.new()
+      return w unless statement.children
+      return w unless statement.children.first
+      w.statements = process_all(statement.children)
+      w
+    end
+    alias :on_true_statements :on_statements
+    alias :on_false_statements :on_statements
+
+    def on_return statement
+      w = ReturnStatement.new()
+      w.return_value = process(statement.children.first)
+      w
+    end
+
+    def on_operator_value statement
+      operator , left_e , right_e = *statement
+      w = OperatorExpression.new()
+      w.operator = operator
+      w.left_expression = process(left_e)
+      w.right_expression = process(right_e)
+      w
+    end
+
+    def on_field_access statement
+      receiver_ast , field_ast = *statement
+      w = FieldAccess.new()
+      w.receiver = process(receiver_ast)
+      w.field = process(field_ast)
+      w
+    end
+
+    def on_receiver expression
+      process expression.children.first
+    end
+
+    def on_call statement
+      name_s , arguments , receiver = *statement
+      w = Tree::CallSite.new()
+      w.name = name_s.children.first
+      w.arguments = process_all(arguments)
+      w.receiver = process(receiver)
+      w
+    end
+
+    def on_int expression
+      Tree::IntegerExpression.new(expression.children.first)
+    end
+
+    def on_true expression
+      Tree::TrueExpression.new
+    end
+
+    def on_false expression
+      Tree::FalseExpression.new
+    end
+
+    def on_nil expression
+      Tree::NilExpression.new
+    end
+
+    def on_name statement
+      Tree::NameExpression.new(statement.children.first)
+    end
+    def on_string expression
+      Tree::StringExpression.new(expression.children.first)
+    end
+
+    def on_class_name expression
+      ClassExpression.new(expression.children.first)
+    end
+
+    def on_assignment statement
+      name , value = *statement
+      w = Assignment.new()
+      w.name = process name
+      w.value = process(value)
+      w
+    end
+
+  end
+end

lib/typed/tree/while_statement.rb

@@ -0,0 +1,7 @@
+module Typed
+  module Tree
+    class WhileStatement < Statement
+      attr_accessor :branch_type , :condition , :statements
+    end
+  end
+end