67 lines
1.4 KiB
Ruby
67 lines
1.4 KiB
Ruby
module Virtual
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class Constant < ::Virtual::Object
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end
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class TrueConstant < Constant
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end
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class FalseConstant < Constant
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end
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class NilConstant < Constant
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end
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# another abstract "marker" class (so we can check for it)
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# derived classes are Boot/Meta Class and StringConstant
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class ObjectConstant < Constant
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def type
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Virtual::Reference
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end
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def clazz
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raise "abstract #{self}"
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end
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end
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class IntegerConstant < Constant
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def initialize int
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@integer = int
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end
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attr_reader :integer
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def type
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Virtual::Integer
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end
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def fits_u8?
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integer >= 0 and integer <= 255
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end
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end
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# The name really says it all.
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# The only interesting thing is storage.
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# Currently string are stored "inline" , ie in the code segment.
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# Mainly because that works an i aint no elf expert.
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class StringConstant < ObjectConstant
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def initialize str
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@string = str
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end
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attr_reader :string
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def result= value
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raise "called"
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class_for(MoveInstruction).new(value , self , :opcode => :mov)
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end
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def clazz
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BootSpace.space.get_or_create_class(:String)
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end
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def layout
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Virtual::Object.layout
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end
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def mem_length
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padded(1 + string.length)
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end
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def position
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return @position if @position
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return @string.position if @string.position
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super
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end
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end
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end |