71 lines
3.2 KiB
Ruby
71 lines
3.2 KiB
Ruby
module Virtual
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# This implements the send logic
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# Send is so complicated that we actually code it in ruby and stick it in
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# That off course opens up an endless loop possibility that we stop by
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# implementing Class and Module methods
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# Note: I find it slightly unsymmetrical that the NewMessage object needs to be created
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# before this instruction.
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# This is because all expressions create a (return) value and that return value is
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# overwritten by the next expression unless saved.
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# And since the message is the place to save it it needs to exist. qed
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class SendImplementation
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def run block
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block.codes.dup.each do |code|
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next unless code.is_a? MessageSend
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new_codes = [ ]
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ref = code.me
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# value known at compile time, got do something with it
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if(ref.value)
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me = ref.value
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if( me.is_a? Parfait::Class )
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raise "unimplemented #{code} me is #{me}"
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elsif( me.is_a? Parfait::Object )
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# get the function from my class. easy peasy
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puts "Me is #{me.class}"
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method = me.get_class.get_instance_method(code.name)
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raise "Method not implemented #{me.class}.#{code.name}" unless method
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new_codes << MethodCall.new( method )
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elsif( me.is_a? Symbol )
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# get the function from my class. easy peasy
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method = Virtual.machine.space.get_class_by_name(:Word).get_instance_method(code.name)
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raise "Method not implemented #{me.class}.#{code.name}" unless method
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new_codes << MethodCall.new( method )
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elsif( me.is_a? Fixnum )
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name = code.name
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name = :plus if name == :+
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method = Virtual.machine.space.get_class_by_name(:Integer).get_instance_method(name)
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#puts Virtual.machine.space.get_class_by_name(:Integer).method_names.to_a
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raise "Method not implemented Integer.#{name}" unless method
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new_codes << MethodCall.new( method )
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else
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# note: this is the current view: call internal send, even the method name says else
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# but send is "special" and accesses the internal method name and resolves.
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kernel = Virtual.machine.space.get_class_by_name(:Kernel)
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method = kernel.get_instance_method(:__send)
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new_codes << MethodCall.new( method )
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raise "unimplemented: \n#{code} \nfor #{ref.inspect}"
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end
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else
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if ref.type.is_a?(Reference) and ref.type.of_class
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#find method and call
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clazz = ref.type.of_class
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begin
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method = clazz.resolve_method code.name
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rescue
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raise "No method found #{code.name} for #{clazz.name} in #{clazz.method_names}" unless method
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end
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#puts "CALL is #{method.name}"
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new_codes << MethodCall.new( method )
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else
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# must defer send to run-time
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# So inlining the code from message.send (in the future)
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raise "not constant/ known object for send #{ref.inspect}"
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end
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end
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block.replace(code , new_codes )
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end
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end
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end
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end
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