java - Xtext:无法解析引用

Question

我有以下 Xtext 语法:

grammar dsl.miniproject.Question2.EclipsePluginLanguage with org.eclipse.xtext.common.Terminals

import "platform:/resource/Question2/model/EclipsePluginModel.ecore" 
import "http://www.eclipse.org/emf/2002/Ecore" as ecore

Plugin:
    {Plugin}
    'Plugin' Name = EntityName
    '{'             
        (documentation = Documentation)?
        (functions += Functionality)*
        manifest = Manifest
    '}'
;

Documentation:
    {Documentation}
    'description =' documentation = STRING
;

Manifest:
    {Manifest}
    'manifest'
    '{'
        (dependencies += Dependency)*
        (extensionPoints += ExtensionPoint)*    
        (extensions += Extension)*
    '}'
;

Functionality:
    {Functionality}
    'function' Name = EntityName ';'
;

Dependency:
    {Dependency}
    Name = EntityName '=>' depends = [Plugin|EntityName]
;

Extension:
    {Extension}
    Name = EntityName '->' extends = [ExtensionPoint|EntityName]
;

ExtensionPoint:
    {ExtensionPoint}
    'ExtensionPoint' Name = EntityName 
    '{'
        'ref' functions += [Functionality|EntityName] ';'       
    '}'
;

EntityName:
    ID ('.' ID)*
;

但是在编写示例脚本时:

    Plugin x{
        description = "test"

        function f;
        function f2;

        manifest{

            dep1 => x

            ExtensionPoint ep.ep1{
                ref f;
            }

            ext1 -> ep.ep1
        }    
}

我收到以下错误:

Couldn't resolve reference to Plugin 'x'. Couldn't resolve reference to Functionality 'f'. ... etc

这是我第一次尝试 xtext，我不知道我做错了什么

在此先感谢您的帮助!!

Answer 1

您好，您应该将元素命名为 name 而不是 Name并且您必须确保在您使用它的地方范围内的(实际)限定名称与您使用的终端或数据类型规则相匹配(在您的情况下 EntityName)或者您可以更改 IQualifiedNameProvider