tutorial.txt

Tutorial for those who want writing their own compiler by scratch using xtext. Hope it helps.

1. Install extex in Eclipse: http://marketplace.eclipse.org/content/xtext
2. If you got this error: "Couldn't resolve reference to Grammar 'org.eclipse.xtext.common.Terminals'."
	- then install eclipse PDE from marketplace
3. Watch this: https://vimeo.com/138873446
4. Read these tutorials: 
	https://www.eclipse.org/Xtext/documentation/102_domainmodelwalkthrough.html
	http://www.euclideanspace.com/software/development/eclipse/xtext/grammar/index.htm
	http://www.euclideanspace.com/software/development/eclipse/xtext/grammar/lexer/index.htm
	very important - https://www.eclipse.org/Xtext/documentation/301_grammarlanguage.html
5. Take a look at:
	org.xtext.compiler.go.MyGo.MyGo.xtext
	org.xtext.compiler.go.tests MyGoParsingText
6. Grammar specification
	https://golang.org/ref/spec
7. Left recursion
	https://stackoverflow.com/questions/36897472/removing-left-recursion-in-xtext
    https://typefox.io/parsing-expressions-with-xtext <- very useful    	
8. http://typefox.io/parsing-expressions-with-xtext