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The official Hack Language specification.
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Matt-Schellhas and kmeht add optional collection intrinsic type hints
Collection intrinsics now allow optional type hint syntax.
Latest commit 315dc30 Apr 19, 2019
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spec add optional collection intrinsic type hints Apr 19, 2019
tests Add Pipe and Placeholder tests May 17, 2016
tools
.gitignore Add new (and update current) tests for Hack Spec 1.1 Mar 30, 2016
CONTRIBUTING.md Fix Contributing Feb 9, 2015
FORMATTING.md Baseline spec for starting the Hack Specification Oct 29, 2014
LICENSE Fix year in LICENSE Feb 19, 2015
README.md Expand the deprecation warning Oct 6, 2018

README.md

Deprecated, Unmaintained

This repo contains the Hack Language Specification, a modified version of the PHP specification. It is no longer maintained and does not reflect the current version of Hack.

Hack Language Specification

The easiest way to navigate the specification is via the table of contents.

The latest official release of the specification is 1.1.

You can run the specification tests with HHVM via its test runner and the Hack typechecker via hh_client.

Pull requests, issue filings and comments are extremely welcome.

Make sure you understand the contribution process.

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