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Facing problem in cross references [message #1819208]

Fri, 10 January 2020 05:03

Nagashree KN

Messages: 32
Registered: September 2018

Member

Hi,

I have one existing model named as mydsl, and i am importing to my grammar like this-

grammar org.xtext.example.mydsl1 with org.eclipse.xtext.common.Terminals

import "http://www.xtext.org/example/mydsl " as mydsl
generate mydsl1 "http://www.xtext.org/example/mydsl1"

I have added referencedResource in mwe2 workflow.

In my grammar i am referring mydsl like -
('Package:' packages+=[mydsl::EPackage|STRING] (packages+=[mydsl::EPackage|STRING])*)?

Here my problem is in Xtext editor if add instances of epackage i am getting error " Couldn't resolve reference to epackage "

So if anyone has any suggestions, what I should check or fix or use, please let me know.

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Re: Facing problem in cross references [message #1819213 is a reply to message #1819208]

Fri, 10 January 2020 06:36

Christian Dietrich

Messages: 13628
Registered: July 2009

Senior Member

does the project with the metamodel have Xtext nature and is added to the dependencies of the mydsl project?

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Re: Facing problem in cross references [message #1819227 is a reply to message #1819213]

Fri, 10 January 2020 09:09

Nagashree KN

Messages: 32
Registered: September 2018

Member

Yes, the project with the metamodel have Xtext nature. In dependency also i have added.

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Re: Facing problem in cross references [message #1819231 is a reply to message #1819227]

Fri, 10 January 2020 09:41

Christian Dietrich

Messages: 13628
Registered: July 2009

Senior Member

could you provide a small reproducing example?

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Re: Facing problem in cross references [message #1819553 is a reply to message #1819231]

Fri, 17 January 2020 09:15

Nagashree KN

Messages: 32
Registered: September 2018

Member

Hi,

This is my mydsl grammar-

grammar org.xtext.example.mydsl.MyDsl with org.eclipse.xtext.common.Terminals
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
generate myDsl "http://www.xtext.org/example/mydsl/MyDsl"

Model:
packages+=EPackage*;

EPackage:
{EPackage}
'EPackage{'
('PackageName:' packageName=String0)?
'}';

String0 returns ecore::EString:
ID* & INT* & '-'*
;

And mydsl1 grammar-

grammar org.xtext.example.mydsl1.MyDsl1 with org.eclipse.xtext.common.Terminals

import "http://www.xtext.org/example/mydsl/MyDsl" as myDsl
import "http://www.eclipse.org/emf/2002/Ecore" as ecore
generate myDsl1 "http://www.xtext.org/example/mydsl1/MyDsl1"

ModelClass:
classes+=Class*;

Class:
{Class}
'Class{'
('ClassName:' className=String0)?
('Package:' packages+=[myDsl::EPackage|String0])?
'}'
;
String0 returns ecore::EString:
ID* & INT* & '-'*
;
Work flow -
Workflow {
component = XtextGenerator {
configuration = {
project = StandardProjectConfig {
baseName = "org.xtext.example.mydsl1"
rootPath = rootPath
runtimeTest = {
enabled = true
}
eclipsePlugin = {
enabled = true
}
eclipsePluginTest = {
enabled = true
}
createEclipseMetaData = true
}
code = {
encoding = "windows-1252"
lineDelimiter = "\r\n"
fileHeader = "/*\n * generated by Xtext \${version}\n */"
}
}
language = StandardLanguage {
name = "org.xtext.example.mydsl1.MyDsl1"
fileExtensions = "mydsl1"
referencedResource = "platform:/resource/org.xtext.example.mydsl/model/generated/MyDsl.genmodel"
serializer = {
generateStub = false
}
parserGenerator = {
antlrParam = "-Xmaxinlinedfastates" antlrParam = "100000"
antlrParam = "-Xmaxswitchcaselabels" antlrParam = "30000"
antlrParam = "-Xminswitchalts" antlrParam="1"
options = {
backtrack = true
classSplitting = true
fieldsPerClass = "2000"
methodsPerClass = "2000"
}
}
validator = {
// composedCheck = "org.eclipse.xtext.validation.NamesAreUniqueValidator"
// Generates checks for @Deprecated grammar annotations, an IssueProvider and a corresponding PropertyPage
generateDeprecationValidation = true
}
junitSupport = {
junitVersion = "5"
}
}
}
}

So if i am trying to refer the package in mydsl1 from mydsl, i am getting "Couldn't resolve reference to EPackage"
I have attached the Runtime xtext editor image.