Hi, I've been trying to build a Proof of Concept IDE for DML using Xtext.
https://github.com/nakul02/sysml.dml Grammar File : https://github.com/nakul02/sysml.dml/blob/master/sysml.dml/src/sysml/Dml.xtext Here are some screenshots: http://imgur.com/a/ZJyg7 The files shown are from the algorithms folder. https://github.com/apache/incubator-systemml/tree/master/scripts/algorithms (There was no particular reason to have chosen these files over others) For this POC, my only goal was to get syntax highlighting to work in Eclipse. SystemML DML grammar is written in ANTLRv4 whereas Xtext uses ANTLRv3. Some amount of work was needed on the grammar before it could be used it for Xtext. >From the screenshots, you can see that eclipse thinks there are syntactic errors in the files. This has to do with statements ending in an optional semicolon. I only supplied xtext a grammar file from which to generate the IDE. I have not yet worked on the generated code to add any other features. I could not come up with a LL(*) grammar that would let me express optional semicolons at the end of statements. For the time being, the grammar requires semicolons at the end of statements (as you can see in the grammar file : https://github.com/nakul02/sysml.dml/blob/master/sysml.dml/src/sysml/Dml.xtext ) I discussed this problem with Fred(@frreiss) and he suggested 3 ways of dealing with this (assuming no way of modifying the grammar to fix this): 1. Support a subset of DML in the XText based tools 2. Modify the xtext generated tools to fix this 3. Write an eclipse plugin from scratch with complete control over lexer and parser (among other components) Option 1 requires the least amount of work. I am not sure between options 2 & 3, which would be more work. Is this useful to anyone? If so, are there any thoughts or suggestions on how to approach the optional semicolon problem? Nakul Jindal https://github.com/nakul02/
