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Date: Wed, 8 Jan 2020 16:25:50 -0500
Cc: Rowan Tommins <rowan.collins@gmail.com>,
 PHP internals <internals@lists.php.net>
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To: Robert Hickman <robehickman@gmail.com>
Subject: Re: [PHP-DEV] Initializing constants once, with code?
From: mike@newclarity.net (Mike Schinkel)

> On Jan 8, 2020, at 11:10 AM, Robert Hickman <robehickman@gmail.com> =
wrote:
>=20
> My suggestion was not a preprocessor, but what others have said
> already, a 'shim' that goes between the parser/lexer and bytecode
> generation which allows user code to inspect and modify the AST. This
> idea is not unusual and Python for example can do this. The idea is
> the basis of macro systems in Lisps, and Rust has a very nice
> implementation of it from what I've seen in passing. The system should
> be fully aware of the syntax, scoping, namespaces etc, the lack of
> which is the problem with C preprocessor for example.
>=20
> With regards to how JAI does this:
>=20
> https://www.youtube.com/watch?v=3DUTqZNujQOlA
> =
https://www.youtube.com/watch?v=3D59lKAlb6cRg&list=3DPLmV5I2fxaiCKfxMBrNsU=
1kgKJXD3PkyxO&index=3D20&t=3D0s

Nice! =20

Never heard of JAI but will be checking it out.

-Mike=