15 lines
415 B
CoffeeScript
15 lines
415 B
CoffeeScript
lispeval = (element, scope) ->
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switch element.type
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when 'boolean' then element.value == '#t'
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when 'number' then parseInt(element.value, 10)
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when 'symbol'
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scope.lookup(element.value)
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when 'list'
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proc = lispeval(element.value[0], scope)
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args = element.value.slice(1)
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proc.apply(args, scope)
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else throw new Error ("Unrecognized type in parse")
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module.exports = lispeval
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