dart - 如何使用 Dart 分析器从源代码生成 AST 并使用 AST？

Question

AST

文档:https://www.dartdocs.org/documentation/analyzer_experimental/0.8.0/analyzer/parseCompilationUnit.html

一些聪明的程序员在野外的优秀示例:https://github.com/mythz/dart-samples/blob/master/frog/leg/scanner/keyword.dart

递归ASTVisitor api:https://www.dartdocs.org/documentation/analyzer_experimental/0.8.0/analyzer/RecursiveASTVisitor-class.html

现在示例代码已移至下面的 wiki。

dart 分析服务器或 dart 服务

IDE 或编辑器用于检测错误的包。

混帐:https://github.com/dart-lang/dart-services

安装:

git 克隆 https://github.com/dart-lang/dart-services.git

运行服务器:

cd Dart 服务

dart ./bin/services.dart --port 8082

客户端代码:

import "dart:convert";
import "dart:io";


const String url = "localhost";
const String path = r"api/dartservices/v1/analyze";
String src = """
main(){
 print('hi');
}
""";

void main() {
  analyse();
}

analyse() async {
  Map m = {'source': src};
  var client = new HttpClient();
  String data = JSON.encode(m);
  HttpClientRequest request = await client.post (
      url, 8082, path);
  request.headers.contentType = ContentType.JSON;
  request.write(data);
  HttpClientResponse r = await request.close();
  r.transform(UTF8.decoder).listen((d){
    print(d);
  });
  client.close(force: false);
}

服务器将/lib/src/common_server.dart 中的类 CommonServer 作为 api 提供服务。 “api/dartservices/v1/analyze”的帖子在类中调用以下方法。

  @ApiMethod(
      method: 'POST',
      path: 'analyze',
      description:
          'Analyze the given Dart source code and return any resulting '
          'analysis errors or warnings.')
  Future<AnalysisResults> analyze(SourceRequest request) {
    return _analyze(request.source);
  }

使用 Analyzer 作为本地对象。

import 'src/analyzer.dart';
import 'src/api_classes.dart';
import 'dart:developer';
String src = """
main(){
  a.print('hi');
}
""";
main() async {
  String sdkPath = r'C:\tools\dart-sdk';
  var a = new Analyzer(sdkPath);
  var m = {'main.dart':src};
  debugger();
  AnalysisResults r = await a.analyzeMulti(m);
  print(r.issues);
  print(r.resolvedImports);
}

分析器相当复杂并且被微任务所笼罩，调试器并没有太大帮助。

Answer 1

dart 2.11，来自测试代码

import 'package:analyzer/dart/analysis/utilities.dart';
import 'package:analyzer/dart/analysis/results.dart';
import 'package:test/test.dart';

void main() {
  test('hello_parser', () {
    String content = '''
void main() => print('Hello, world!')
''';
    ParseStringResult result = parseString(content: content, throwIfDiagnostics: false);
    // print(result.unit.toSource());
    expect(result.content, content);
    expect(result.errors, hasLength(1));
    expect(result.lineInfo, isNotNull);
    expect(result.unit.toString(), equals("void main() => print('Hello, world!');"));
  });
}