It's a V8-specific extension, as far as I know. In the global scope, it creates an immutable binding on the global object. Inside of a function body, it behaves like a constant variable, which may not be accessible before initialization (to be tested).

Supporting it for global variables would be easy, but supporting it for locals might complicate things a little bit. Whether we want to support it or not is a question of whether we want to implement a non-standard extensions now, and whether we think that this makes our code safer (less-likely to have bugs) or not.

- Maxime

I noticed that several of our source files use the "const" keyword, which is not supported by our parser. What is the semantics of "const" and should Tachyon support it?

Marc

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