69 lines
1.3 KiB
Ruby
69 lines
1.3 KiB
Ruby
# collection of the simple ones, int and strings and such
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module Ast
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class IntegerExpression < Expression
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attr_reader :value
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def initialize val
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@value = val
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end
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def inspect
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self.class.name + ".new(" + value.to_s+ ")"
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end
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def to_s
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value.to_s
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end
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def compile context , into
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Vm::IntegerConstant.new value
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end
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def attributes
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[:value]
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end
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end
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class NameExpression < Expression
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attr_reader :name
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def initialize name
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@name = name.to_sym
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end
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# compiling a variable resolves it.
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# if it wasn't defined, nli is returned
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def compile context , into
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context.locals[name]
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end
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def inspect
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"#{self.class.name}.new(#{name})"
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end
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def to_s
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name.to_s
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end
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def attributes
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[:name]
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end
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end
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class ModuleName < NameExpression
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end
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class StringExpression < Expression
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attr_reader :string
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def initialize str
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@string = str
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end
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def inspect
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self.class.name + '.new("' + string + '")'
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end
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def to_s
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'"' + string.to_s + '"'
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end
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def compile context , into
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value = Vm::StringConstant.new(string)
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context.object_space.add_object value
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value
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end
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def attributes
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[:string]
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end
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end
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end |