58 lines
1021 B
Ruby
58 lines
1021 B
Ruby
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module RKelly
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class Runtime
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class ScopeChain
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include RKelly::JS
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def initialize(scope = Scope.new)
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@chain = [GlobalObject.new]
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end
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def <<(scope)
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@chain << scope
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end
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def has_property?(name)
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scope = @chain.reverse.find { |x|
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x.has_property?(name)
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}
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scope ? scope[name] : nil
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end
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def [](name)
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property = has_property?(name)
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return property if property
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@chain.last.properties[name]
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end
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def []=(name, value)
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@chain.last.properties[name] = value
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end
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def pop
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@chain.pop
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end
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def this
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@chain.last
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end
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def new_scope(&block)
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@chain << Scope.new
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result = yield(self)
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@chain.pop
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result
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end
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def return=(value)
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@chain.last.return = value
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end
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def return; @chain.last.return; end
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def returned?
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@chain.last.returned?
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end
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end
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end
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end
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