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news, sorta

Posted 01-10-2013 at 03:48 PM by rainbowsally

The new parser that will be in mc2 3.1 (currently 3.0) is really very nice (based on but changed a bit from the test files recently posted.)

You'll never find a parser that's super-easy to use, but this one is in C (no intermediate file), makes sense in C, and is debuggable in C so debugging both the code and the algorithms is much much easier than something like flex, lemon, or the gazillion other alternatives.

As kind of a challenge, we started the first few passes...

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Parser Test 3 (A Return Stack & Compiler)

Posted 01-03-2013 at 09:53 AM by rainbowsally
Updated 01-10-2013 at 06:05 PM by rainbowsally

Tags computer mad science, debugger, mc2, parsing, simple c

Parser Test 3 (A Return Stack & Compiler)

A self extractor for the 'lib' files that we include for this (pretty cute) little calculator are here.
http://www.linuxquestions.org/questi...wsally-615861/

Re: the compiler part. It's not much of a compiler, but it serves as a proof of concept. (It's used internally, the program is not compiled.)

Before we dig in here, I should say...

Bug in Parser Test 2.

...

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Parser Test 2 (Something a bit more ambitious, maybe?)

Posted 01-03-2013 at 01:36 AM by rainbowsally

Parser Test 2 (Something a bit more ambitious, maybe?)

Here's test2.

Features:

Lots of custom parser funcs in order to create a parser for algebraic expressions. See 'expr' 'times', and all that good stuff in the source file 'src/test2.cpp' below.

This is the output from a session.

Code:

Input some math expressions and maybe we can identify them.
Type 'quit' to end
3b + 5 * 4e-5 / (2 * 5) + 4
<--------------------------->

...

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Parser Test 1

Posted 01-02-2013 at 08:24 PM by rainbowsally
Updated 01-02-2013 at 08:26 PM by rainbowsally

Tags computer mad science, debugger, mc2, parsing, simple c

Parser Test 1

------------------------------------

See the previous blog entry: "Playing with parsing" here.
http://www.linuxquestions.org/questi...wsally-615861/
to grab the files we need to include for these tests and a working mc2 definitions file for those who have mc2. Type "mc2 -init" first time. After that "make update" will add/remove files from the makefile.

[Note that we can link OR include...

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Playing with parsing

Posted 01-02-2013 at 07:46 PM by rainbowsally
Updated 08-06-2014 at 08:36 AM by rainbowsally (typo correction)

Tags computer mad science, debugger, mc2, parsing, simple c

Playing with parsing

Today's features:

Creating an extensible mid-level parser that makes sense in C.
Looking at BNF-like syntax and C syntax similarities.
Tossing flex as far as we can throw it. While its still burning.

The file set here isn't 'finalized' in any way but it's been stable for a few days. These examples are therefor not about THIS set of functions but about parsing in general, although this file set will very likely be part of the mc2 parsing system...

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