Recognizers
===========

Matthias Trute <<mtrute@web.de>>
Version 1.1.0 - 2016-09-18

This package is a collection of recognizer
examples. To play with them, simple implementations 
for (old) gforth and VFX are included.
These words are not (yet) able to compile code
or are otherwise integrated into the underlying
system.

`Recognizer*.4th`
----------------
These files in combination with `Stack.4th` give a
playground for making experiments with recognizers. They
have been tested with gforth versions that usually
come with the linux distributions and MPE's vfxlin (a
random older version from 2014).

The files `Recognizer-gforth.4th` and `Recognizer-vfx.4th`
differ in two aspects only. First is the tester framework.
Gforth supplies the `T{` `}T` words while vfx has the
older `{` `}` pair (and a slightly different filename
to be used). Second is the implementation of
the number recognizers which use existing words that
differ alot.

`rec-char.4th`
--------------

Forth 2012 defined the 'c' syntax for single characters.
That means that `char c` or `[char] c` can be replaced
with `\`c\``.

Just load the file and put the `rec:char` at the right
place into the recognizer stack. Your system shall have
a better one, this one is more educational.

`rec-dnum.4th`
--------------

A recognizer for double numbers only. It strictly
follows the Forth 2012 spec and allows trailing
dots only.

It is based on `>NUMBER` for the actual number conversion,
some features such as signs and number prefixes are mising.
Your system shall have a better one, this one is more 
educational.

`literacy.4th`
--------------

Simple formatting of source code in the
spirit von Don Knuth literate programming. You can
combine the real source code and its documentation
in one document that the standard forth interpreter
can handle directly.

Author: Julian Fondren, 2014
License: probably public domain.

`time-rec.4th`
--------------

check and convert for the hh:mm:ss notation returning
a double cell number for the number of seconds it
represents.

Author: Matthias Trute, 2013
License: public domain