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Date: Tue, 22 Oct 2013 11:16:54 -0700
Subject: Re: Python Front-end to GCC
From: Mark Janssen <dreamingforward@gmail.com>
To: Ned Batchelder <ned@nedbatchelder.com>
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Cc: Python List <python-list@python.org>, Dave Angel <davea@davea.name>, Steven D'Aprano <steve@pearwood.info>
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Xref: csiph.com comp.lang.python:57290

>>>> So which of you is confused?  I ask that in the inclusive (not
>>>> exclusive OR) sense.... ;^)  <-- face says "both".
>>>
>>> Could you please be less snarky?
>>
>> Okay.  The purpose of BNF (at least as I envision it) is to
>> produce/specify a *context-free* "grammar".  A lexer parses the tokens
>> specified in the BNF into an Abstract Syntax Tree.  If one can produce
>> such a tree for any given source, the language, in theory, can be
>> compiled by GCC into an executable.
>>
>> Boom.
>
> Hmm, I don't hear the boom yet.  An Abstract Syntax Tree is a tree
> representation of a program.  To use my previous example: the program "123
> *!? 456" would become a tree:
>
>     op: "*!?"
>         num: 123
>         num: 456
>
> There's still not enough information to compile this.

....Is your language Turing complete?

-- 
MarkJ
Tacoma, Washington