maroon_base.rb in maroon-0.7.0

- old
+ new
@@ -17,251 +17,293 @@
 #          say do
 #            @who #could be self as well to refer to the current role player of the 'who' role
 #          end
 #        end
 #      greeting do
-#        p "Hello #{who.say}!"
+#        p 'Hello #{who.say}!'
 #      end
 #    end
 #
 #    class Greeter
 #      def initialize(player)
 #         #@who = player
 #      end
 #    end
 #
-#    Greeter.new('world').greeting #Will print "Hello world!"
+#    Greeter.new('world').greeting #Will print 'Hello world!'
 #maroon is base on Marvin which was the first injectionless language for DCI
 #being injectionless there's no runtime extend or anything else impacting the performance. There' only regular method invocation even when using role methods
 #Author:: Rune Funch Søltoft (funchsoltoft@gmail.com)
 #License:: Same as for Ruby
 ##
-Context::generate_files_in 'generated'
-context :Context do
-  role :roles do
-  end
-  role :interactions do
-  end
-  role :defining_role do
-  end
-  role :role_alias do
-  end
-  role :alias_list do
-  end
-  role :cached_roles_and_alias_list do
-  end
+c = context :Context do
 
-  #define is the only exposed method and can be used to define a context (class)
-  #if maroon/kernel is required calling context of Context::define are equivalent
-  #params
-  #name:: the name of the context. Since this is used as the name of a class, class naming convetions should be used
-  #block:: the body of the context. Can include definitions of roles (through the role method) or definitions of interactions
-  #by simply calling a method with the name of the interaction and passing a block as the body of the interaction
-  define :block => :block, :self => self do |*args|
+  def self.define(*args, &block)
     @@with_contracts ||= nil
     @@generate_file_path ||= nil
-    alias method_missing role_or_interaction_method
+    (alias :method_missing :role_or_interaction_method)
+
     base_class, ctx, default_interaction, name = self.send(:create_context_factory, args, block)
-    ctx.generate_files_in(args.last()) if args.last().instance_of? FalseClass or args.last().instance_of? TrueClass
-    return ctx.send(:finalize, name, base_class, default_interaction)
+    if (args.last.instance_of?(FalseClass) or args.last.instance_of?(TrueClass)) then
+      ctx.generate_files_in(args.last)
+    end
+    return ctx.send(:finalize, name, base_class, default_interaction, @@generate_file_path, @@with_contracts)
+
   end
 
-  generate_files_in :block => :b,:self => self do |*args|
-    return role_or_interaction_method(:generate_files_in, *args, &b) if block_given?
-
+  def self.generate_files_in(*args, &b)
+    if block_given? then
+      return role_or_interaction_method(:generate_files_in, *args, &b)
+    end
     @@generate_file_path = args[0]
+
   end
 
   private
-  with_contracts self do |*args|
-    return @@with_contracts if args.length == 0
+
+  def get_definitions(b)
+    sexp = b.to_sexp
+    unless is_definition? sexp[3]
+      sexp = sexp[3]
+      if sexp
+        sexp = sexp.select do |exp|
+          is_definition? exp
+        end
+      end
+      sexp ||= []
+    end
+
+    sexp.select do |exp|
+      is_definition? exp
+    end
+  end
+
+  def self.create_context_factory(args, block)
+    name, base_class, default_interaction = *args
+    if default_interaction and (not base_class.instance_of?(Class)) then
+      base_class = eval(base_class.to_s)
+    end
+    if base_class and ((not default_interaction) and (not base_class.instance_of?(Class))) then
+      base_class, default_interaction = default_interaction, base_class
+    end
+    ctx = Context.new
+    ctx.instance_eval {
+      sexp = block.to_sexp
+      temp_block = sexp[3]
+      i = 0
+
+      while i < temp_block.length
+        exp = temp_block[i]
+        unless temp_block[i-2] && temp_block[i-2][0] == :call && temp_block[i-1] && temp_block[i-1][0] == :args
+          if exp[0] == :defn || exp[0] == :defs
+            add_method(exp)
+            temp_block.delete_at i
+            i -= 1
+          elsif exp[0] == :call && exp[1] == nil && exp[2] == :private
+            @private = true
+          end
+        end
+        i += 1
+      end
+      ctx.instance_eval &block
+    }
+
+    return [base_class, ctx, default_interaction, name]
+
+  end
+
+  def self.with_contracts(*args)
+    return @@with_contracts if (args.length == 0)
     value = args[0]
-    raise 'make up your mind! disabling contracts during execution will result in undefined behavior' if @@with_contracts && !value
+    if @@with_contracts and (not value) then
+      raise('make up your mind! disabling contracts during execution will result in undefined behavior')
+    end
     @@with_contracts = value
+
   end
 
-  ##
-  #Defines a role with the given name
-  #role methods can be defined inside a block passed to this method
-  # = Example
-  #       role :who do
-  #          say do
-  #            p @who
-  #          end
-  #       end
-  #The above code defines a role called 'who' with a role method called say
-  ##
-  role :block => :b do |*args|
-    role_name = args[0]
-    return role_or_interaction_method(:role, *args, &b) if args.length != 1 or not (role_name.instance_of? Symbol)
+  def createInfo(definition)
+    MethodInfo.new(definition, @defining_role, @private)
+  end
 
+  def is_definition?(exp)
+    exp && (exp[0] == :defn || exp[0] == :defs)
+  end
+
+  def role(*args, &b)
+    role_name = args[0]
+    if (args.length.!=(1) or (not role_name.instance_of?(Symbol))) then
+      return role_or_interaction_method(:role, *args, &b)
+    end
     @defining_role = role_name
+    @roles = {} unless @roles
     @roles[role_name] = Hash.new
-    yield if block_given?
-    @defining_role = nil
-  end
 
-  initialize :block => :b do |*args|
-    if block_given?
-      role_or_interaction_method(:initialize, *args, &b)
-    else
-      @roles = Hash.new
-      @interactions = Hash.new
-      @role_alias = Hash.new
-      @contracts = Hash.new
+    definitions = get_definitions(b)
+
+    definitions.each do |exp|
+      add_method(exp)
     end
-  end
 
-  role_or_interaction_method(:private)  do
-    @private = true
   end
 
-  current_interpretation_context :block => :b do |*args|
-    return role_or_interaction_method(:current_interpretation_context, *args, &b) if block_given?
-    InterpretationContext.new(roles, contracts, role_alias, nil)
+  def current_interpretation_context(*args, &b)
+    if block_given? then
+      return role_or_interaction_method(:current_interpretation_context, *args, &b)
+    end
+    InterpretationContext.new(@roles, @contracts, @role_alias, nil)
+
   end
 
-  get_methods :block => :b do |*args|
+  def get_methods(*args, &b)
     return role_or_interaction_method(:get_methods, *args, &b) if block_given?
     name = args[0]
     sources = (@defining_role ? (@roles[@defining_role]) : (@interactions))[name]
-    if @defining_role && !sources
+    if @defining_role and (not sources) then
       @roles[@defining_role][name] = []
     else
-      (@interactions)[name] = []
+      @interactions[name] = []
     end
-  end
 
-  role :contracts do
   end
 
-  add_method :block => :b do |*args|
+  def add_method(*args, &b)
     return role_or_interaction_method(:add_method, *args, &b) if block_given?
-    name, method = *args
-    sources = get_methods(name)
-    sources << method
+    exp = args[0]
+    info = createInfo exp
+    sources = get_methods(info.name)
+    (sources << info)
   end
 
-  finalize :block => :b do |*args|
+  def finalize(*args, &b)
     return role_or_interaction_method(:finalize, *args, &b) if block_given?
-    name, base_class, default = *args
-
+    name, base_class, default, file_path, with_contracts = *args
     code = generate_context_code(default, name)
-
-    if @@generate_file_path
+    if file_path then
       name = name.to_s
-      complete = 'class ' + name + (base_class ? '<< ' + base_class.name : '') + '
-      ' + code.to_s + '
-      end'
-      File.open('./' + @@generate_file_path.to_s + '/' + name + '.rb', 'w') { |f| f.write(complete) }
+      complete = ((((('class ' + name) + (base_class ? (('<< ' + base_class.name)) : (''))) + '
+      ') + code.to_s) + '
+           end')
+      File.open((((('./' + file_path.to_s) + '/') + name) + '.rb'), 'w') do |f|
+        f.write(complete)
+      end
       complete
     else
-
-      c = base_class ? (Class.new base_class) : Class.new
-      if @@with_contracts
-        c.class_eval('def self.assert_that(obj)
-          ContextAsserter.new(self.contracts,obj)
-        end
-        def self.refute_that(obj)
-          ContextAsserter.new(self.contracts,obj,false)
-        end
-        def self.contracts
-          @@contracts
-        end
-        def self.contracts=(value)
-          raise \'Contracts must be supplied\' unless value
-          @@contracts = value
-        end')
-        c.contracts=contracts
+      c = base_class ? (Class.new(base_class)) : (Class.new)
+      if with_contracts then
+        c.class_eval(
+            'def self.assert_that(obj)
+  ContextAsserter.new(self.contracts,obj)
+end
+def self.refute_that(obj)
+  ContextAsserter.new(self.contracts,obj,false)
+end
+def self.contracts
+  @@contracts
+end
+def self.contracts=(value)
+  @@contracts = value
+end')
+        c.contracts = contracts
       end
-      Kernel.const_set name, c
-      temp = c.class_eval(code)
-      (temp || c)
-    end
-  end
+      Kernel.const_set(name, c)
+      begin
+        temp = c.class_eval(code)
+      rescue SyntaxError
+        p 'error: ' + code
+      end
 
-  create_context_factory self do |args, block|
-    name, base_class, default_interaction = *args
-    #if there's two arguments and the second is not a class it must be an interaction
-    if default_interaction && (!base_class.instance_of? Class) then
-      base_class = eval(base_class.to_s)
+      (temp or c)
     end
-    base_class, default_interaction = default_interaction, base_class if base_class and !default_interaction and !base_class.instance_of? Class
-    ctx = Context.new
-    ctx.instance_eval &block
-    return base_class, ctx, default_interaction, name
+
   end
 
-  generate_context_code :block => :b do |*args|
-    return role_or_interaction_method(:generate_context_code, *args, &b) if block_given?
+  def generate_context_code(*args, &b)
+    if block_given? then
+      return role_or_interaction_method(:generate_context_code, *args, &b)
+    end
     default, name = args
-
     getters = ''
     impl = ''
     interactions = ''
     @interactions.each do |method_name, methods|
       methods.each do |method|
         @defining_role = nil
-        code = ' ' + (method.build_as_context_method method_name, current_interpretation_context)
-        if method.is_private
-          getters << code
-        else
-          interactions << code
-        end
+        code = (' ' + method.build_as_context_method(current_interpretation_context))
+        method.is_private ? ((getters << code)) : ((interactions << code))
       end
     end
-
-    if default
-      interactions << '
-         def self.call(*args)
-             arity = ' + name.to_s + '.method(:new).arity
+    if default then
+      (interactions << (((((((('
+               def self.call(*args)
+             arity = ' + name.to_s) + '.method(:new).arity
              newArgs = args[0..arity-1]
-             obj = ' + name.to_s + '.new *newArgs
+             obj = ') + name.to_s) + '.new *newArgs
              if arity < args.length
                  methodArgs = args[arity..-1]
-                 obj.' + default.to_s + ' *methodArgs
+                 obj.') + default.to_s) + ' *methodArgs
              else
-                obj.' + default.to_s + '
-             end
+                obj.') + default.to_s) + '
+                             end
          end
-         '
-      interactions << '
-      def call(*args);' + default.to_s + ' *args; end
-'
+         '))
+      (interactions << (('
+            def call(*args);' + default.to_s) + ' *args; end
+'))
     end
-
     @roles.each do |role, methods|
-      getters << 'attr_reader :' + role.to_s + '
-      '
-
+      (getters << (('attr_reader :' + role.to_s) + '
+      '))
       methods.each do |method_name, method_sources|
-        raise 'Duplicate definition of ' + method_name.to_s unless method_sources.length < 2
-        raise 'No source for ' + method_name.to_s unless method_sources.length > 0
-
+        unless (method_sources.length < 2) then
+          raise(('Duplicate definition of ' + method_name.to_s))
+        end
+        unless (method_sources.length > 0) then
+          raise(('No source for ' + method_name.to_s))
+        end
         method_source = method_sources[0]
         @defining_role = role
-        rewritten_method_name = 'self_' + role.to_s + '_' + method_name.to_s
-        definition = method_source.build_as_context_method rewritten_method_name, current_interpretation_context
-        (impl << '   ' + definition.to_s) if definition
+
+        definition = method_source.build_as_context_method(current_interpretation_context)
+        (impl << ('   ' + definition.to_s)) if definition
       end
     end
-
-
-    interactions + '
- private
-' + getters + '
+    private_string = (getters + impl).strip! != '' ? '
+     private
+' : ''
+    impl = impl.strip! != '' ? '
     ' + impl + '
+    ' : '
     '
+    interactions + private_string + getters + impl
+
   end
 
-  role_or_interaction_method({:block => :b}) do |*arguments|
+  def role_or_interaction_method(*arguments, &b)
     method_name, on_self = *arguments
-    unless method_name.instance_of? Symbol
+    unless method_name.instance_of?(Symbol) then
       on_self = method_name
       method_name = :role_or_interaction_method
     end
+    raise(('Method with out block ' + method_name.to_s)) unless block_given?
 
-    raise 'Method with out block ' + method_name.to_s unless block_given?
+  end
 
-    add_method(method_name, MethodInfo.new(on_self, b.to_sexp, @private))
+  def private
+    @private = true
   end
-end
\ No newline at end of file
+
+  def initialize
+    @roles = {}
+    @interactions = {}
+    @role_alias = {}
+  end
+
+end
+
+if c.instance_of? String
+  file_name = './generated/Context.rb'
+  p "writing to: " + file_name
+  File.open(file_name, 'w') do |f|
+    f.write(c)
+  end
+end