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Throwing an error when pattern matching has a non-identifier on the left-hand side.

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Jeremy Ashkenas
2010-04-25 11:22:15 -04:00
parent 08c877ec7b
commit ca4ea7649d
2 changed files with 5 additions and 0 deletions
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src/nodes.coffee
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@@ -692,6 +692,8 @@ exports.AssignNode: class AssignNode extends BaseNode
for obj, i in @variable.base.objects
idx: i
[obj, idx]: [obj.value, obj.variable.base] if @variable.is_object()
if not (obj instanceof ValueNode or obj instanceof SplatNode)
throw new Error 'pattern matching must use only identifiers on the left-hand side.'
is_string: idx.value and idx.value.match IS_STRING
access_class: if is_string or @variable.is_array() then IndexNode else AccessorNode
if obj instanceof SplatNode and not splat