47 lines
1.4 KiB
Ruby
47 lines
1.4 KiB
Ruby
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# A message is what is created when a message is sent. Args and stuff are packed up in to a
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# Message and the Message is activated (by swapping it into the machine).
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# Part of the housekeeping (see attributes) makes messages a double linked list (next_message and
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# caller) , and maybe surprisingly this means that we can create all messages at compile-time
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# and link them up and never have to touch that list again.
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# All the args and receiver data changes, but the list of messages stays constant
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# (a pleasant stupor while we ignore closures and longer extended frames ).
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module Parfait
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class Message < Object
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# :next_message => :Message, :receiver => :Object, :frame => :NamedList ,
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# :return_address => :Integer, :return_value => :Integer,
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# :caller => :Message , :name => :Word , :arguments => :NamedList
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attr_accessor :next_message
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attr_reader :receiver , :frame
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attr_reader :return_address, :return_value
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attr_reader :caller , :method , :arguments
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def initialize( next_m )
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@next_message = next_m
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@frame = NamedList.new()
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@arguments = NamedList.new()
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super()
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end
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def set_receiver(rec)
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@receiver = rec
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end
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def set_caller(caller)
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@caller = caller
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end
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def get_type_for(name)
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index = @type.get_index(name)
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get_at(index)
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end
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def to_s
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"Message:#{method&.name}(#{arguments.get_length})"
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end
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end
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end
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