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Code assist for DataType rules [message #1779847]

Sun, 14 January 2018 16:07

Pent Down

Messages: 4
Registered: January 2018

Junior Member

Hello,
I would like to get some help regarding this problem:

I have a data type rule like this (unit of measure) with a Value converter etc..
A valid value would be ex: 200 mm

UomLength returns UomLength:
INT STRING
;

I need to get the code assist popup after I type the integer value. The code assist has to show the units available.

I can only get the popup for the whole thing only, not the integer.
Still is reasonable, I can suggest "0 mm" and jump the cursor but I am asking if it's possible

Thanks and Regards,
PD

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Re: Code assist for DataType rules [message #1779849 is a reply to message #1779847]

Sun, 14 January 2018 17:48

Christian Dietrich

Messages: 12187
Registered: July 2009

Senior Member

i am not sure if a datatype rule is very good here cause error recovery / context calculation might be bad.

you may try to play around with

UomLength returns UomLength:
INT ID
;

class MyDslProposalProvider extends AbstractMyDslProposalProvider {
	
	override complete_UomLength(EObject model, RuleCall ruleCall, ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		super.complete_UomLength(model, ruleCall, context, acceptor)
		if (context.prefix.isEmpty) {
			acceptor.accept(createCompletionProposal("1", context))
		} else if (context.prefix.endsWith(" ")) {
			acceptor.accept(createCompletionProposal(context.prefix+"mm", context))
		} else {
			acceptor.accept(createCompletionProposal(context.prefix+" mm", context))
		}  
	}
	
	@Inject MyDslGrammarAccess ga
	
	override complete_ID(EObject model, RuleCall ruleCall, ContentAssistContext context, ICompletionProposalAcceptor acceptor) {
		if (ruleCall === ga.uomLengthAccess.IDTerminalRuleCall_1) {
			acceptor.accept(createCompletionProposal("mm", context))
		}
		super.complete_ID(model, ruleCall, context, acceptor)
	}
	
}

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