Syntax:
ComputedPropertyName[Yield] :
[ AssignmentExpression[In, ?Yield] ]
Referred to by:
PropertyName[Yield,GeneratorParameter] :
LiteralPropertyName
[+GeneratorParameter] ComputedPropertyName
[~GeneratorParameter] ComputedPropertyName[?Yield]
Early errors:
None.
Spec:
12.2.5 Object Initializer
See also
Esprima issue on Google Code
V8 support for computed property names
Error messages in V8