grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals

generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"

Model:
	definitions+=(Definition | Usage)*;
	
Definition:
	'def' name=ID '{'
	    elements+=ID (',' elements+=ID)*
	'}';

Usage:
    'list' 'of' '{' list+=[Definition] (',' list+=[Definition])* '}'
;

class MyDslFormatter extends AbstractFormatter2 {
	
	@Inject extension MyDslGrammarAccess

	def dispatch void format(Model model, extension IFormattableDocument document) {
		// TODO: format HiddenRegions around keywords, attributes, cross references, etc. 
		for (EObject definitions : model.getDefinitions()) {
			definitions.format;
		}
	}
	
	def dispatch void format(Definition df, extension IFormattableDocument document)
	{
        df.interior[indent]
        df.regionFor.keyword("def").append[oneSpace]
        df.regionFor.feature(Literals.DEFINITION__NAME).append[oneSpace]
        df.regionFor.keyword("{").prepend[oneSpace].append[newLine]

        for (element : df.elements) {
            element.format
        }

        for (comma : df.regionFor.keywords(",")) {
            comma.prepend[noSpace].append[newLine]
        }

        df.regionFor.keyword("}").prepend[newLine].append[newLines = 2]
	} 
    
    def dispatch void format(Usage usage, extension IFormattableDocument document)
    {
        usage.interior[indent]
        usage.regionFor.keyword("list").append[oneSpace]
        usage.regionFor.keyword("of").append[oneSpace]
        usage.regionFor.keyword("{").append[newLine]

        for (item : usage.list) {
            format(item, document)
        }
        
        usage.regionFor.keyword("}").prepend[newLine].append[newLines = 2]
    } 
}

def d1 {
            ww, // Indent will grow each time 'd1' appears in list below
            qq
}

list of {
    d1, d1
}

        for (item : usage.list) {
            format(item, document)
        }