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Can you elaborate on these incompatibilities, particularly generators? I work on the project and the only generator incompatibility I know of is that what PHP5

Can you elaborate on these incompatibilities, particularly generators? I work on the project and the only generator incompatibility I know of is that what PHP5 calls "Generator" we call "Continuation", but only since we haven't gotten around to renaming ours yet :) I'm also pretty sure HHVM supports 5.6 variadic functions in PHP code, or will very soon; the Hack typechecker currently does not, but that is strictly a missing feature, and something we do want to support.

Gigablah 12y ago
There's already open issues in GitHub regarding the differences in generator syntax -- I commented in one: https://github.com/facebook/hhvm/issues/1787 https://github.com/facebook/hhvm/issues/1787 I guess the class has been renamed in trunk, but according to this, the syntax differences still remain: https://github.com/facebook/hhvm/issues/1871 https://github.com/facebook/hhvm/issues/1871 And while we're at it, might as well point out the missing Closure::bind and Closure::bindTo from PHP 5.4: https://github.com/facebook/hhvm/issues/1203 https://github.com/facebook/hhvm/issues/1203