36 lines
881 B
Ruby
36 lines
881 B
Ruby
module Mom
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# A BlockYield calls an argument block. All we need to know is the index
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# of the argument, and the rest is almost as simple as a SimpleCall
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class BlockYield < Instruction
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attr :arg_index
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def initialize(index)
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@arg_index = index
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end
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def to_s
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"BlockYield[#{arg_index}] "
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end
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def to_risc(compiler)
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return_label = Risc.label("block_yield", "continue_#{object_id}")
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index = arg_index
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compiler.build("BlockYield") do
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next_message! << message[:next_message]
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return_address! << return_label
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next_message[:return_address] << return_address
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block_reg! << message[:arguments]
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block_reg << block_reg[index]
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message << message[:next_message]
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add_code Risc::DynamicJump.new("block_yield", block_reg )
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add_code return_label
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end
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end
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end
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end
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