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26 lines
631 B
26 lines
631 B
require_relative "expr"
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module Lox
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module Stmt
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def self.stmt(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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stmt :Block, :stmts
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stmt :Class, :name, :superclass, :methods
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stmt :Expr, :expr
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stmt :Function, :name, :params, :body
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stmt :If, :cond, :then, :else
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stmt :Print, :expr
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stmt :Return, :keyword, :value
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stmt :Var, :name, :initializer
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stmt :While, :cond, :body
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end
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end
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