"Couldn't resolve reference to Grammar 'org.eclipse.xtext.common.Terminals'" - PDE 已安装

Question

我正在尝试在 xtext 中创建基本语法，例如下面的默认语法：

grammar x.Y with org.eclipse.xtext.common.Terminals

generate x "http://www.Y.x"

Model:
    greetings+=Greeting*;

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

但是，我收到一个错误：

Couldn't resolve reference to Grammar 'org.eclipse.xtext.common.Terminals'.

网上查了下，建议安装Eclipse Plug-in Development Tools (PDE)。我已经这样做了，但问题仍然存在（清理项目后）。

我也试过RCP Eclipse Nero包，问题依旧。

我已经安装了 Java SE 1.8，我正在使用 Eclipse Nero（RCP 和非 RCP）。

我在网上找不到更多建议，唯一的建议似乎是确保安装了 PDE。有什么想法吗？

更新

在项目设置中设置了默认值。

项目结构截图：

主要问题如下：

Description Resource Path Location Type Bundle 'org.eclipse.equinox.common' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl/META-INF line 10 Plug-in Problem Bundle 'org.eclipse.ui.editors' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui/META-INF line 13 Plug-in Problem Bundle 'org.eclipse.ui.ide' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui/META-INF line 14 Plug-in Problem Bundle 'org.eclipse.xtext.ide' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ide/META-INF line 9 Plug-in Problem Bundle 'org.eclipse.xtext.junit4' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui.tests/META-INF line 12 Plug-in Problem Bundle 'org.eclipse.xtext.testing' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.tests/META-INF line 10 Plug-in Problem Bundle 'org.eclipse.xtext.testing' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui.tests/META-INF line 10 Plug-in Problem Bundle 'org.eclipse.xtext.ui.codetemplates.ui' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui/META-INF line 12 Plug-in Problem Bundle 'org.eclipse.xtext.ui.shared' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui/META-INF line 11 Plug-in Problem Bundle 'org.eclipse.xtext.ui' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui/META-INF line 10 Plug-in Problem Bundle 'org.eclipse.xtext.xbase.ide' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ide/META-INF line 10 Plug-in Problem Bundle 'org.eclipse.xtext.xbase.junit' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui.tests/META-INF line 13 Plug-in Problem Bundle 'org.eclipse.xtext.xbase.testing' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.tests/META-INF line 11 Plug-in Problem Bundle 'org.eclipse.xtext.xbase.testing' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui.tests/META-INF line 11 Plug-in Problem Bundle 'org.eclipse.xtext.xbase' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl/META-INF line 9 Plug-in Problem Bundle 'org.eclipse.xtext' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl/META-INF line 8 Plug-in Problem Bundle 'org.junit' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.tests/META-INF line 9 Plug-in Problem Bundle 'org.junit' cannot be resolved MANIFEST.MF /org.xtext.example.mydsl.ui.tests/META-INF line 9 Plug-in Problem Bundle com.ibm.icu cannot be resolved build.properties /org.xtext.example.mydsl line 19 Plug-in Problem Bundle org.apache.commons.logging cannot be resolved build.properties /org.xtext.example.mydsl line 17 Plug-in Problem Bundle org.apache.log4j cannot be resolved build.properties /org.xtext.example.mydsl line 18 Plug-in Problem Bundle org.eclipse.emf.codegen.ecore cannot be resolved build.properties /org.xtext.example.mydsl line 12 Plug-in Problem Bundle org.eclipse.emf.mwe.utils cannot be resolved build.properties /org.xtext.example.mydsl line 13 Plug-in Problem Bundle org.eclipse.emf.mwe2.launch cannot be resolved build.properties /org.xtext.example.mydsl line 14 Plug-in Problem Bundle org.eclipse.emf.mwe2.lib cannot be resolved build.properties /org.xtext.example.mydsl line 15 Plug-in Problem Bundle org.eclipse.xtext.common.types cannot be resolved build.properties /org.xtext.example.mydsl line 10 Plug-in Problem Bundle org.eclipse.xtext.xbase cannot be resolved build.properties /org.xtext.example.mydsl line 9 Plug-in Problem Bundle org.eclipse.xtext.xtext.generator cannot be resolved build.properties /org.xtext.example.mydsl line 11 Plug-in Problem Bundle org.objectweb.asm cannot be resolved build.properties /org.xtext.example.mydsl line 16 Plug-in Problem Couldn't resolve reference to Grammar 'org.eclipse.xtext.common.Terminals'. MyDsl.xtext /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 1 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/MyDsl.xtext Grammar Problem Couldn't resolve reference to JvmIdentifiableElement 'baseName'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 13 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'code'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 26 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'component'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 10 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'configuration'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 11 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'createEclipseMetaData'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 24 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'eclipsePlugin'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 18 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'eclipsePluginTest'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 21 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'enabled'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 16 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'enabled'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 19 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'enabled'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 22 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'encoding'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 27 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'fileExtensions'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 34 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'fileHeader'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 29 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'generateStub'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 37 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'language'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 32 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'lineDelimiter'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 28 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'name'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 33 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'project'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 12 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'rootPath'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 14 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'runtimeTest'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 15 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'serializer'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 36 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmIdentifiableElement 'validator'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 39 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmType 'StandardLanguage'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 32 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmType 'StandardProjectConfig'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 12 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmType 'Workflow'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 8 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem Couldn't resolve reference to JvmType 'XtextGenerator'. GenerateMyDsl.mwe2 /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 10 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/GenerateMyDsl.mwe2 MWE2 Problem ID cannot be resolved to a rule MyDsl.xtext /org.xtext.example.mydsl/src/org/xtext/example/mydsl line: 9 /org.xtext.example.mydsl/src/org/xtext/example/mydsl/MyDsl.xtext Grammar Problem No available bundle exports package 'org.apache.log4j' MANIFEST.MF /org.xtext.example.mydsl.ui/META-INF line 15 Plug-in Problem

Answer 1

确保您的目标平台没有损坏或丢失：Window -> 首选项 -> 搜索 "Target Platform"