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22 lines
529 B
22 lines
529 B
module Lox
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module Expr
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def self.expr(name, *children)
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klass = Struct.new(name.to_s, *children) do
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def accept(visitor)
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klass = self.class.to_s.split("::").last.downcase
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visitor.send("visit_#{klass}", self)
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end
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end
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const_set(name, klass)
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end
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expr :Assign, :name, :value
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expr :Binary, :left, :op, :right
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expr :Grouping, :expr
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expr :Literal, :value
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expr :Logical, :left, :op, :right
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expr :Unary, :op, :right
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expr :Variable, :name
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end
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end
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