On 2012-09-05 07:57, Nikita Popov wrote:
Hey folks!
Some people asked me what the advantages of using an AST-based
parsing/compilation process are, so I put together a few quick notes
in an RFC:
https://wiki.php.net/rfc/ast_based_parsing_compilation_process
It would be nice to get a few comments from other core devs on this.
Nikita
I'm not a core dev, but I would like to add to the notes above that
"third parties", such as myself, who want to do things with PHP source
other than run it through a PHP interpreter would also appreciate such a
separation of concerns.
To date, I've been basing work, which exposes syntactic structure, on
phc's maketea grammar (Phalanger's is more up to date, but also more
complicated what with its provenance and the Linq and generics and all),
but it's reverse-engineered and certainly wrong (oh, that reminds
me...); the existing grammar is unsuitable because no-one wants to see
_that_.
Something authoritative that _by definition_ tracks the current version
would be more reassuring as regards accuracy and compatibility (and be
more likely to result in something that deserves to be let out into the
world with confidence).
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