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Xtext (Xbase) QualifiedName not parsed completely [message #1230577]

Sun, 12 January 2014 07:29

Eclipse User

Hello guys,

I need little help with understanding and fixing a problem, why Xtext parser stops parsing after finding a keyword from a language, even tough the syntax says something else.

I am using the xtext wizard from eclipse to create the Hello language, and then I just change the grammar section to be based on Xbase.

grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.xbase.Xbase

generate myDsl ...

Model:
	greetings+=Greeting*;
	
Greeting:
	'Hello' name=QualifiedName '!';

and add this to the model inferrer

for (greeting : model.greetings) 
{
	acceptor.accept(greeting.toClass( QualifiedName.create(greeting.name) )).initializeLater
	[
		members += greeting.toMethod("hello" + greeting.name, greeting.newTypeRef(typeof(String))) 
		[
			body = [ append('''return "Hello «greeting.name»";''') ]
		]
	]		
}

then generate the code and run eclipse afterwards everything seems to work as expected, but when I write

Hello test.Hello!

the '.' and '!' get underlined and Hello is highlighted. The outline shows two elements which is wrong and
model inferrer is called twice. First time for 'test' Qualified name and second an empty string.
index.php/fa/17219/0/

I expected that the inferrer would be called once with 'name' set to test.Hello

QualifiedName:
  ValidID (=>'.' ValidID)*;

Attachment: debuging_inferrer.png
(Size: 189.97KB, Downloaded 758 times)
Attachment: editor.png
(Size: 11.60KB, Downloaded 491 times)

Re: Xtext (Xbase) QualifiedName not parsed completely [message #1230705 is a reply to message #1230577]

Sun, 12 January 2014 16:40

Eclipse User

Hi,

you have to escape keywords using ^Hello
or
use a special rule instead of validid

QualifiedName:
MyValidID (=>'.' MyValidID)*;

MyValidID: ValidID | 'Hello';

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