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Validate key within key-value-list [message #1816705]

Tue, 05 November 2019 11:26

Timur Ametov

Messages: 1
Registered: November 2019

Junior Member

I'm very new in XText. So please forgive me, if I use wrong terminology.

In our code we have a grammar describing key-value-list.

KeyValues:
	{KeyValues}
	('version' KeyValuesVersion=VERSION ';')?
	KeyValues+=KeyValue*;

KeyValue:
	name=ID '=' value=STRING ('[' speechs+=Speech (',' speechs+=Speech)* ']')? ('short=' short=STRING)?  ';'
;

Speech:
	value=STRING
;

terminal VERSION returns ecore::EString:
	('0'..'9')+ '.' ('0'..'9')+ '.' ('0'..'9')+
;

@Override
terminal ID:
	('a'..'z'|'A'..'Z'|'_'|'-'|'.') ('a'..'z'|'A'..'Z'|'_'|'-'|'0'..'9'|'.')*	
;

Almost everything works as expected.

However there is one issue for that I have no idea how to solve it.

In case a key contains characters which are not match to regex of ID (e.g, 1key = "value") we just see "missing EOF at '1'(org.eclipse.xtext.diagnostics.Diagnostic.Syntax)".

Is there any possibility to catch the EOF-error and so to provide a message like "The key is invalid, it may only contain following characters"?

Thank you in advance.

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