Ah, you're right in case the syntax is for instantiating objects of existing classes/structs. My take was that the OP wanted the object literals to be able to c

Ah, you're right in case the syntax is for instantiating objects of existing classes/structs. My take was that the OP wanted the object literals to be able to create new types. In Javascript, var a = { x: 123, y: 456 } is meaningful without a prior class declaration.