-
Recent Posts
Recent Comments
Archives
- August 2022
- December 2021
- July 2021
- March 2021
- October 2020
- September 2020
- June 2019
- February 2018
- November 2017
- August 2016
- April 2016
- February 2016
- November 2015
- July 2015
- October 2014
- May 2014
- November 2013
- August 2013
- July 2013
- June 2013
- May 2013
- February 2013
- January 2013
- October 2012
- August 2012
Categories
Meta
OpenPhoenux
Author Archives: neilbrown
edlib – render-lines, what a good idea.
I had a brain-wave last week. I thought it would take me about a day to implement but it took 3 to get it working almost reasonably and the rest of the week to polish it and create some proper … Continue reading
Posted in edlib
Leave a comment
edlib – commands
It been over 3 months – maybe you thought I had given up – but no. I had some holidays and other distractions, but I’m back and will be working fairly consistently for a while. The topic for today is … Continue reading
Posted in edlib
Leave a comment
edlib – managing input
Commands to an editor – at least the sort of editor that edlib is designed for – usually involve single keystrokes or key combinations. Translating those keystrokes, as well as mouse actions, into commands is the topic of this note. … Continue reading
Posted in edlib
Leave a comment
edlib – displays and panes
Displaying the document being edited is, of course, very important for any editor. I have memories of the first editor I used on Unix which was em, rather than the well known “ed”. It actually allowed a single line to … Continue reading
Posted in edlib
Leave a comment
edlib – because one more editor is never enough.
I’ve decided to write an editor. Silly idea I know – there are already two out there: both vim and emacs are quite good. I’ve heard rumors that there might be others, but investigation always shows they are just toys, … Continue reading
Posted in edlib
Leave a comment
Structured statements and expressions in Ocean
Now that I have my general parsing worked out and understand how I want to use indents and line breaks to give a two dimensional structure to my language, I need to think about the details of some of the … Continue reading
Posted in Language Design
Leave a comment
A case for multiple completed items in LR parser states.
In my earlier note about LR parsing I observed that many simple grammars will only ever have at most one REDUCE action in any given state. This means that there is no need for an “action table” to list which … Continue reading
Posted in Language Design
Leave a comment
Line breaks – a reprise.
In two previous articles I explored an approach to enhancing an LR parser to work with indents and line breaks. While I discovered some useful ideas and produced some code that seemed to work, I’ve subsequently discovered some serious flaws … Continue reading
Posted in Language Design
Leave a comment
Linebreaks in a two-dimensional language
My previous note introduced the problem of parsing a two-dimensional language and the need to pay attention to indenting and line breaks and use them to guide the parsing of the language, both to enhance error detection, and to resolve … Continue reading
Posted in Language Design
Leave a comment
Parsing a two-dimensional language.
Many programming languages are essentially one dimensional. The parser treats them simply as a linear sequence of tokens. A program could all be written on a single line, or with each token on a separate line and the parser or … Continue reading
Posted in Language Design
Leave a comment
