add hw2

node_modules/langium/lib/grammar/lsp/grammar-semantic-tokens.js

@@ -0,0 +1,76 @@
+/******************************************************************************
+ * Copyright 2022 TypeFox GmbH
+ * This program and the accompanying materials are made available under the
+ * terms of the MIT License, which is available in the project root.
+ ******************************************************************************/
+import { SemanticTokenTypes } from 'vscode-languageserver';
+import { AbstractSemanticTokenProvider } from '../../lsp/semantic-token-provider.js';
+import { isAction, isAssignment, isParameter, isParameterReference, isReturnType, isRuleCall, isSimpleType, isTypeAttribute } from '../../languages/generated/ast.js';
+export class LangiumGrammarSemanticTokenProvider extends AbstractSemanticTokenProvider {
+    highlightElement(node, acceptor) {
+        var _a;
+        if (isAssignment(node)) {
+            acceptor({
+                node,
+                property: 'feature',
+                type: SemanticTokenTypes.property
+            });
+        }
+        else if (isAction(node)) {
+            if (node.feature) {
+                acceptor({
+                    node,
+                    property: 'feature',
+                    type: SemanticTokenTypes.property
+                });
+            }
+        }
+        else if (isReturnType(node)) {
+            acceptor({
+                node,
+                property: 'name',
+                type: SemanticTokenTypes.type
+            });
+        }
+        else if (isSimpleType(node)) {
+            if (node.primitiveType || node.typeRef) {
+                acceptor({
+                    node,
+                    property: node.primitiveType ? 'primitiveType' : 'typeRef',
+                    type: SemanticTokenTypes.type
+                });
+            }
+        }
+        else if (isParameter(node)) {
+            acceptor({
+                node,
+                property: 'name',
+                type: SemanticTokenTypes.parameter
+            });
+        }
+        else if (isParameterReference(node)) {
+            acceptor({
+                node,
+                property: 'parameter',
+                type: SemanticTokenTypes.parameter
+            });
+        }
+        else if (isRuleCall(node)) {
+            if ((_a = node.rule.ref) === null || _a === void 0 ? void 0 : _a.fragment) {
+                acceptor({
+                    node,
+                    property: 'rule',
+                    type: SemanticTokenTypes.type
+                });
+            }
+        }
+        else if (isTypeAttribute(node)) {
+            acceptor({
+                node,
+                property: 'name',
+                type: SemanticTokenTypes.property
+            });
+        }
+    }
+}
+//# sourceMappingURL=grammar-semantic-tokens.js.map