fix: A stub parser to make diagnostics work again

CHANGELOG.md

@@ -24,6 +24,9 @@ Changelog structure reference:
 ### Removed
 - IDEA 2022 support (Necessary change for the new documentation backend in lsp4intellij)
 
+### Fixed
+- Error highlighting now works on IDEA 2023
+
 ## [0.5.0] "The *ZON*iverse"
 
 ### Added

src/main/java/com/falsepattern/zigbrains/zig/parser/ZigFile.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright 2023 FalsePattern
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.falsepattern.zigbrains.zig.parser;
+
+import com.falsepattern.zigbrains.zig.ide.ZigFileType;
+import com.falsepattern.zigbrains.zig.ide.ZigLanguage;
+import com.intellij.extapi.psi.PsiFileBase;
+import com.intellij.openapi.fileTypes.FileType;
+import com.intellij.psi.FileViewProvider;
+import org.jetbrains.annotations.NotNull;
+
+public class ZigFile extends PsiFileBase {
+    public ZigFile(@NotNull FileViewProvider viewProvider) {
+        super(viewProvider, ZigLanguage.INSTANCE);
+    }
+
+    @Override
+    public @NotNull FileType getFileType() {
+        return ZigFileType.INSTANCE;
+    }
+
+    @Override
+    public String toString() {
+        return "Zig File";
+    }
+}

src/main/java/com/falsepattern/zigbrains/zig/parser/ZigParserDefinition.java

@@ -0,0 +1,87 @@
+/*
+ * Copyright 2023 FalsePattern
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.falsepattern.zigbrains.zig.parser;
+
+import com.falsepattern.zigbrains.zig.ide.ZigLanguage;
+import com.falsepattern.zigbrains.zon.ZonLanguage;
+import com.falsepattern.zigbrains.zon.lexer.ZonLexerAdapter;
+import com.falsepattern.zigbrains.zon.parser.ZonParser;
+import com.falsepattern.zigbrains.zon.parser.ZonTokenSets;
+import com.falsepattern.zigbrains.zon.psi.ZonTypes;
+import com.intellij.lang.ASTFactory;
+import com.intellij.lang.ASTNode;
+import com.intellij.lang.ParserDefinition;
+import com.intellij.lang.PsiBuilder;
+import com.intellij.lang.PsiParser;
+import com.intellij.lexer.DummyLexer;
+import com.intellij.lexer.Lexer;
+import com.intellij.openapi.fileTypes.PlainTextParserDefinition;
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.FileViewProvider;
+import com.intellij.psi.PlainTextTokenTypes;
+import com.intellij.psi.PsiElement;
+import com.intellij.psi.PsiFile;
+import com.intellij.psi.tree.IElementType;
+import com.intellij.psi.tree.IFileElementType;
+import com.intellij.psi.tree.TokenSet;
+import com.intellij.psi.util.PsiUtilCore;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+public class ZigParserDefinition implements ParserDefinition {
+    public static final IFileElementType FILE = new IFileElementType(ZigLanguage.INSTANCE) {
+        public ASTNode parseContents(@NotNull ASTNode chameleon) {
+            final CharSequence chars = chameleon.getChars();
+            return ASTFactory.leaf(PlainTextTokenTypes.PLAIN_TEXT, chars);
+        }
+    };
+
+    @Override
+    public @NotNull Lexer createLexer(Project project) {
+        return new DummyLexer(FILE);
+    }
+
+    @Override
+    public @NotNull TokenSet getCommentTokens() {
+        return TokenSet.EMPTY;
+    }
+
+    @Override
+    public @NotNull TokenSet getStringLiteralElements() {
+        return TokenSet.EMPTY;
+    }
+
+    @Override
+    public @NotNull PsiParser createParser(Project project) {
+        throw new UnsupportedOperationException("Not Supported");
+    }
+
+    @Override
+    public @NotNull IFileElementType getFileNodeType() {
+        return FILE;
+    }
+
+    @Override
+    public @NotNull PsiFile createFile(@NotNull FileViewProvider viewProvider) {
+        return new ZigFile(viewProvider);
+    }
+
+    @Override
+    public @NotNull PsiElement createElement(ASTNode node) {
+        return PsiUtilCore.NULL_PSI_ELEMENT;
+    }
+}

src/main/resources/META-INF/plugin.xml

@@ -66,6 +66,9 @@
                   language="Zig"
                   extensions="zig"/>
 
+        <lang.parserDefinition language="Zig"
+                               implementationClass="com.falsepattern.zigbrains.zig.parser.ZigParserDefinition"/>
+
         <colorSettingsPage implementation="com.falsepattern.zigbrains.zig.ide.ZigColorSettingsPage"/>
 
         <applicationConfigurable parentId="language"