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Completion with Enum [message #1693692]

Mon, 27 April 2015 14:30

naseclipse naseclipse

Messages: 14
Registered: April 2015

Junior Member

Hello,

When it comes to completion for Enum literals, I see some problem when a certain literal is part of another literal. For example, 'may' and 'may have' are literals, where 'may' is part of 'may have'. During completion 'may have' overrides 'may'.

How is it possible to complete 'may' if i choose to, and ignore 'may have'?

/* Editor */
Type pronoun
Type verb

Statement s1 she:pronoun may have togo:verb
Statement s2 she:pronoun may go:verb // shows error in this line

Error: mismatched character 'g' expecting 'h'

/* the grammar */
grammar org.xtext.example.langdsl.LangDsl with org.eclipse.xtext.common.Terminals

generate langDsl "http://www.xtext.org/example/langdsl/LangDsl"

LanguageModel:
elements += LangModel*
;
LangModel:
Type | Statement
;
Type:
"Type" name = ID
;
Statement:
"Statement" name = ID
subject = ID ':' subType = [Type] verb = VerbEnum object = ID ':' objType = [Type]
;
enum VerbEnum:
MAY = 'may' | MAYHAVE = 'may have'
;
/* END: grammar */

Thank you.
Regards,
Nas

[Updated on: Mon, 27 April 2015 14:35]

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Re: Completion with Enum [message #1693698 is a reply to message #1693692]

Mon, 27 April 2015 16:23

Sebastian Zarnekow

Messages: 3118
Registered: July 2009

Senior Member

You should always avoid spaces in keywords. Provide a data type rule
instead to parse your enum.

Best,
Sebastian
--
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Re: Completion with Enum [message #1693721 is a reply to message #1693698]

Mon, 27 April 2015 21:09

naseclipse naseclipse

Messages: 14
Registered: April 2015

Junior Member

Hello Sebastian,

The enum rule shows me the list of keywords to choose. But the dataType rule does not provide me with content assist at least with the default configuration of xText.
But I did some twist on the literal, that is I appended a space at the end of the literal, 'may' as follows:

enum VerbEnum:
MAY = 'may<space>' | MAYHAVE = 'may have'
;
I ve no explanation for this but, now it parses 'may' successfully
Statement s2 she:pronoun may go:verb

Thank you
Regards,
Nas

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