removing exceptions

lib/ast/basic_expressions.rb

@@ -62,4 +62,8 @@ module Ast
       value
     end
   end
+  class AssignmentExpression < Expression
+    def compile frame , method
+    end
+  end
 end

lib/ast/if_expression.rb

@@ -1,7 +1,8 @@
 module Ast
   class IfExpression < Expression
 #    attr_reader  :cond, :if_true, :if_false
-    def compile context
+    def compile frame , method
+      return nil
       f = context.function
       # to execute the logic as the if states it, the blocks are the other way around
       # so we can the jump over the else if true ,and the else joins unconditionally after the true_block

lib/ast/operator_expressions.rb

@@ -1,7 +1,10 @@
 module Ast
   class OperatorExpression < Expression
 #    attr_reader  :operator, :left, :right
-    def compile context
+    def compile frame , method
+      nil
+    end
+    def scratch
       into = context.function
       puts "compiling operator #{to_s}"
       r_val = right.compile(context)

lib/ast/return_expression.rb

@@ -1,7 +1,10 @@
 module Ast
   class ReturnExpression < Expression
 #    attr_reader  :expression
-    def compile context
+    def compile frame ,method
+      nil
+    end
+    def sc
       into = context.function
       puts "compiling return expression #{expression}, now return in return_regsiter"
       expression_value = expression.compile(context)

lib/ast/while_expression.rb

@@ -1,7 +1,10 @@
 module Ast
   class WhileExpression < Expression
 #    attr_reader  :condition, :body
-    def compile context
+    def compile frame , method
+      nil
+    end
+    def old
       into = context.function
       ret = into.new_block "while_end"
       while_block = into.new_block "while_start"

lib/virtual/instruction.rb

@@ -15,6 +15,9 @@ module Virtual
     def attributes
       [:next]
     end
+    def initialize nex = nil
+      @next = nex
+    end
   end
 
   # the first instruction we need is to stop. Off course in a real machine this would be a syscall, but that is just 

lib/virtual/method.rb

@@ -15,15 +15,15 @@ module Virtual
       Method.new(:main , [] , Virtual::SelfReference )
     end
     def attributes
-      [:name , :args , :receiver , :start , :return_type]
+      [:name , :args , :receiver , :return_type , :start]
     end
-    def initialize name , args , receiver = Virtual::SelfReference.new , return_type = Virtual::Reference 
+    def initialize name , args , receiver = Virtual::SelfReference.new , return_type = Virtual::Reference , start = MethodEnter.new
       @name = name.to_sym
       @args = args
       @locals = []
       @receiver = receiver
       @return_type = return_type
-      @start = MethodEnter.new
+      @start = start
       @current = @start
     end
     attr_reader :name , :args , :receiver , :start

test/virtual/test_methods.rb

@@ -9,7 +9,7 @@ def foo(x)
   5
 end
 HERE
-    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)],Virtual::SelfReference.new())]
+    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)],Virtual::SelfReference.new(),Virtual::IntegerConstant.new(5),Virtual::MethodEnter.new(nil))]
     check
   end
 
@@ -31,6 +31,7 @@ def foo(x)
 end
 HERE
     @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+    check
   end
 
   def test_function_if
@@ -43,9 +44,8 @@ def ofthen(n)
   end
 end
 HERE
-    @parse_output = {:function_name=>{:name=>"ofthen"}, :parameter_list=>[{:parameter=>{:name=>"n"}}], :expressions=>[{:if=>"if", :conditional=>{:integer=>"0"}, :if_true=>{:expressions=>[{:l=>{:name=>"isit"}, :o=>"= ", :r=>{:integer=>"42"}}], :else=>"else"}, :if_false=>{:expressions=>[{:l=>{:name=>"maybenot"}, :o=>"= ", :r=>{:integer=>"667"}}], :end=>"end"}}], :end=>"end"}
-    @transform_output = Ast::FunctionExpression.new(:ofthen, [Ast::NameExpression.new(:n)] , [Ast::IfExpression.new(Ast::IntegerExpression.new(0), [Ast::AssignmentExpression.new(Ast::NameExpression.new(:isit),Ast::IntegerExpression.new(42))],[Ast::AssignmentExpression.new(Ast::NameExpression.new(:maybenot),Ast::IntegerExpression.new(667))] )] ,nil )
-    @parser = @parser.function_definition
+      @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+      check
   end
 
   def test_function_return
@@ -55,9 +55,8 @@ def retvar(n)
   return i 
 end
 HERE
-    @parse_output = {:function_name=>{:name=>"retvar"}, :parameter_list=>[{:parameter=>{:name=>"n"}}], :expressions=>[{:l=>{:name=>"i"}, :o=>"= ", :r=>{:integer=>"5"}}, {:return=>"return", :return_expression=>{:name=>"i"}}], :end=>"end"}
-    @transform_output = Ast::FunctionExpression.new(:retvar, [Ast::NameExpression.new(:n)] , [Ast::AssignmentExpression.new(Ast::NameExpression.new(:i),Ast::IntegerExpression.new(5)),Ast::ReturnExpression.new(Ast::NameExpression.new(:i) )] ,nil )
-    @parser = @parser.function_definition
+    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+    check
   end
 
   def test_function_return_if
@@ -70,9 +69,8 @@ def retvar(n)
   end 
 end
 HERE
-    @parse_output = {:function_name=>{:name=>"retvar"}, :parameter_list=>[{:parameter=>{:name=>"n"}}], :expressions=>[{:if=>"if", :conditional=>{:l=>{:name=>"n"}, :o=>"> ", :r=>{:integer=>"5"}}, :if_true=>{:expressions=>[{:return=>"return", :return_expression=>{:integer=>"10"}}], :else=>"else"}, :if_false=>{:expressions=>[{:return=>"return", :return_expression=>{:integer=>"20"}}], :end=>"end"}}], :end=>"end"}
-    @transform_output = Ast::FunctionExpression.new(:retvar, [Ast::NameExpression.new("n")] , [Ast::IfExpression.new(Ast::OperatorExpression.new(">", Ast::NameExpression.new("n"),Ast::IntegerExpression.new(5)), [Ast::ReturnExpression.new(Ast::IntegerExpression.new(10) )],[Ast::ReturnExpression.new(Ast::IntegerExpression.new(20) )] )] )
-    @parser = @parser.function_definition
+    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+    check
   end
 
   def test_function_return_while
@@ -84,9 +82,8 @@ def retvar(n)
   end 
 end
 HERE
-    @parse_output = {:function_name=>{:name=>"retvar"}, :parameter_list=>[{:parameter=>{:name=>"n"}}], :expressions=>[{:while=>"while", :while_cond=>{:l=>{:name=>"n"}, :o=>"> ", :r=>{:integer=>"5"}}, :do=>"do", :body=>{:expressions=>[{:l=>{:name=>"n"}, :o=>"= ", :r=>{:l=>{:name=>"n"}, :o=>"+ ", :r=>{:integer=>"1"}}}, {:return=>"return", :return_expression=>{:name=>"n"}}], :end=>"end"}}], :end=>"end"}
-    @transform_output = Ast::FunctionExpression.new(:retvar, [Ast::NameExpression.new(:n)] , [Ast::WhileExpression.new(Ast::OperatorExpression.new(">", Ast::NameExpression.new(:n),Ast::IntegerExpression.new(5)), [Ast::AssignmentExpression.new(Ast::NameExpression.new(:n),Ast::OperatorExpression.new("+", Ast::NameExpression.new(:n),Ast::IntegerExpression.new(1))), Ast::ReturnExpression.new(Ast::NameExpression.new(:n) )] )] ,nil )
-    @parser = @parser.function_definition
+    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+    check
   end
 
   def test_function_while
@@ -99,9 +96,8 @@ def fibonaccit(n)
   end
 end
 HERE
-    @parse_output = {:function_name=>{:name=>"fibonaccit"}, :parameter_list=>[{:parameter=>{:name=>"n"}}], :expressions=>[{:l=>{:name=>"a"}, :o=>"= ", :r=>{:integer=>"0"}}, {:while=>"while", :while_cond=>{:name=>"n"}, :do=>"do", :body=>{:expressions=>[{:l=>{:name=>"some"}, :o=>"= ", :r=>{:integer=>"43"}}, {:l=>{:name=>"other"}, :o=>"= ", :r=>{:l=>{:name=>"some"}, :o=>"* ", :r=>{:integer=>"4"}}}], :end=>"end"}}], :end=>"end"}
-    @transform_output = Ast::FunctionExpression.new(:fibonaccit, [Ast::NameExpression.new(:n)] , [Ast::AssignmentExpression.new(Ast::NameExpression.new(:a),Ast::IntegerExpression.new(0)),Ast::WhileExpression.new(Ast::NameExpression.new(:n), [Ast::AssignmentExpression.new(Ast::NameExpression.new(:some),Ast::IntegerExpression.new(43)), Ast::AssignmentExpression.new(Ast::NameExpression.new(:other),Ast::OperatorExpression.new("*", Ast::NameExpression.new(:some),Ast::IntegerExpression.new(4)))] )] ,nil )
-    @parser = @parser.function_definition
+    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+    check
   end
 
   def test_function_big_while
@@ -118,8 +114,7 @@ def fibonaccit(n)
   end
 end
 HERE
-    @parse_output = {:function_name=>{:name=>"fibonaccit"}, :parameter_list=>[{:parameter=>{:name=>"n"}}], :expressions=>[{:l=>{:name=>"a"}, :o=>"= ", :r=>{:integer=>"0"}}, {:l=>{:name=>"b"}, :o=>"= ", :r=>{:integer=>"1"}}, {:while=>"while", :while_cond=>{:l=>{:name=>"n"}, :o=>"> ", :r=>{:integer=>"1"}}, :do=>"do", :body=>{:expressions=>[{:l=>{:name=>"tmp"}, :o=>"= ", :r=>{:name=>"a"}}, {:l=>{:name=>"a"}, :o=>"= ", :r=>{:name=>"b"}}, {:l=>{:name=>"b"}, :o=>"= ", :r=>{:l=>{:name=>"tmp"}, :o=>"+ ", :r=>{:name=>"b"}}}, {:call_site=>{:name=>"puts"}, :argument_list=>[{:argument=>{:name=>"b"}}]}, {:l=>{:name=>"n"}, :o=>"= ", :r=>{:l=>{:name=>"n"}, :o=>"- ", :r=>{:integer=>"1"}}}], :end=>"end"}}], :end=>"end"}
-    @transform_output = Ast::FunctionExpression.new(:fibonaccit, [Ast::NameExpression.new(:n)] , [Ast::AssignmentExpression.new(Ast::NameExpression.new(:a),Ast::IntegerExpression.new(0)),Ast::AssignmentExpression.new(Ast::NameExpression.new(:b),Ast::IntegerExpression.new(1)),Ast::WhileExpression.new(Ast::OperatorExpression.new(">", Ast::NameExpression.new(:n),Ast::IntegerExpression.new(1)), [Ast::AssignmentExpression.new(Ast::NameExpression.new(:tmp),Ast::NameExpression.new(:a)), Ast::AssignmentExpression.new(Ast::NameExpression.new(:a),Ast::NameExpression.new(:b)), Ast::AssignmentExpression.new(Ast::NameExpression.new(:b),Ast::OperatorExpression.new("+", Ast::NameExpression.new(:tmp),Ast::NameExpression.new(:b))), Ast::CallSiteExpression.new(:puts, [Ast::NameExpression.new(:b)] ,Ast::NameExpression.new(:self)), Ast::AssignmentExpression.new(Ast::NameExpression.new(:n),Ast::OperatorExpression.new("-", Ast::NameExpression.new(:n),Ast::IntegerExpression.new(1)))] )] ,nil )
-    @parser = @parser.function_definition
+    @output = [Virtual::Method.new(:foo,[Ast::NameExpression.new(:x)])]
+    check
   end  
 end