40 lines
1.2 KiB
Ruby
40 lines
1.2 KiB
Ruby
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module RKelly
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module JS
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class Function < Base
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class << self
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def create(*args)
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if args.length > 0
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parser = RKelly::Parser.new
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body = args.pop
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tree = parser.parse("function x(#{args.join(',')}) { #{body} }")
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func = tree.value.first
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self.new(func.function_body, func.arguments)
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else
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self.new
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end
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end
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end
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attr_reader :body, :arguments
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def initialize(body = nil, arguments = [])
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super()
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@body = body
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@arguments = arguments
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self['prototype'] = JS::FunctionPrototype.new(self)
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self['toString'] = :undefined
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self['length'] = arguments.length
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end
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def js_call(scope_chain, *params)
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arguments.each_with_index { |name, i|
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scope_chain[name.value] = params[i] || RKelly::Runtime::UNDEFINED
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}
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function_visitor = RKelly::Visitors::FunctionVisitor.new(scope_chain)
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eval_visitor = RKelly::Visitors::EvaluationVisitor.new(scope_chain)
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body.accept(function_visitor) if body
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body.accept(eval_visitor) if body
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end
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end
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end
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end
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