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Fri, 22 March 2019 06:36

Eclipse User

Hi,
I want to validate the white space character between two elements and raise warning if more than one space.

Please find my grammar,
grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals

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

Model:
greetings+=Greeting*|LgInstruction;

Greeting:
'Hello' name=ID '!';

AutoNetArg: tag=ID ('=' value=ID)?
;

LgInstruction :
{LgInstruction} 'lg'(args+=(AutoNetArg))*
;

my language code is
Hello world
lg name=wip value=auto

in LG command, after LG keyword, more than one space is allowed, if it is more than one space, raise warnings.

In validator, I am able to get only the String tokens, how to do space validation between lg keyword and next elements.

Tanks for your kind help

Re: Space validation [message #1804317 is a reply to message #1804314]

Fri, 22 March 2019 07:12

Eclipse User

maybe you can do something like org.eclipse.xtext.serializer.sequencer.HiddenTokenSequencer.getHiddenNodesBetween(INode, INode)

Re: Space validation [message #1804412 is a reply to message #1804317]

Mon, 25 March 2019 13:47

Eclipse User

As an alternative, you could write a formatter to remove the extra spaces.

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