在Angular 13应用程序中使用Antlr 4,需要升级Antlr 4到最新版本(4.9.4),并通过以下步骤安装Antlr 4 TypeScript运行时以使其兼容:
npm install antlr4@latest --save-dev
npm install antlr4ts --save-dev
{
"compilerOptions": {
...
"paths": {
"antlr4ts": ["node_modules/antlr4ts"]
},
...
}
}
import * as antlr4 from 'antlr4';
import { YourGrammarLexer } from './your-grammar-lexer';
import { YourGrammarParser } from './your-grammar-parser';
import { YourGrammarVisitor } from './your-grammar-visitor';
@Injectable({
providedIn: 'root'
})
export class YourService {
constructor() { }
public parse(input: string): any {
const chars = new antlr4.InputStream(input);
const lexer = new YourGrammarLexer(chars);
const tokens = new antlr4.CommonTokenStream(lexer);
const parser = new YourGrammarParser(tokens);
parser.buildParseTrees = true;
const tree = parser.start();
const visitor = new YourGrammarVisitor();
return visitor.visit(tree);
}
}
在以上步骤完成后,就可以开始在Angular 13应用程序中使用Antlr 4解析器了。