49 lines
2.2 KiB
Ruby
49 lines
2.2 KiB
Ruby
module Phisol
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Compiler.class_eval do
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def on_call statement
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#puts statement
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name , arguments , receiver = *statement
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name = name.to_a.first
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raise "not inside method " unless @method
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reset_regs
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if receiver
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me = process( receiver.to_a.first )
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else
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me = Register.self_reg @method.for_class.name
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end
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#move the new message (that we need to populate to make a call) to std register
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new_message = Register.resolve_to_register(:new_message)
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@method.source.add_code Register.get_slot(@method, :message , :next_message , new_message )
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# move our receiver there
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@method.source.add_code Register.set_slot( statement , me , :new_message , :receiver)
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# load method name and set to new message (for exceptions/debug)
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name_tmp = use_reg(:Word)
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@method.source.add_code Register::LoadConstant.new(statement, name , name_tmp)
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@method.source.add_code Register.set_slot( statement , name_tmp , :new_message , :name)
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# next arguments. reset tmp regs for each and load result into new_message
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arguments.to_a.each_with_index do |arg , i|
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reset_regs
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# processing should return the register with the value
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val = process( arg)
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raise "Not register #{val}" unless val.is_a?(Register::RegisterValue)
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# which we load int the new_message at the argument's index
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@method.source.add_code Register.set_slot( statement , val , :new_message , i + 1)
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end
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# now we have to resolve the method name (+ receiver) into a callable method
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clazz = Virtual.machine.space.get_class_by_name(me.type)
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raise "No such class #{me.type}" unless clazz
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method = clazz.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 #{me.type}.#{name}" unless method
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@method.source.add_code Virtual::MethodCall.new( method )
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ret = use_reg( method.source.return_type )
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# the effect of the method is that the NewMessage Return slot will be filled, return it
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# but move it into a register too
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@method.source.add_code Register.get_slot(@method, :message , :return_value , ret )
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ret
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end
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end
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end
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