Dart 如何删除顶级函数、getter和setter

如果我有以下库，我如何创建撕下的内容：

main.dart

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

---

使用前缀导入库时，这是可能的

其他自由省道

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

main.dart

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

但它也在同一个文件中工作

main.dart

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

分析器尚未识别语法，但代码在VM中运行良好（前沿）。另见

这两个例子都有印刷品

_v1:Closure:（）=>int来自函数“get:val1”：静态，3
_v2:Closure:（）=>int来自函数'get:val2'：静态，4
_闭包：（int，int）=>int来自函数'someFunc'：静态，12

---

使用前缀导入库时，这是可能的

其他自由省道

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

main.dart

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

但它也在同一个文件中工作

main.dart

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

main() {
  // create tear-offs of someFunc, val1, and val2 here
}

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

class OtherClass {
  int someFunc(int x, int y) => x * y;
  int get val1 => 3;
  int get val2 => 4;
}

import 'other_lib.dart' as o;

void main() {
  var _x = o#someFunc;
  var _v1 = o#val1;
  var _v2 = o#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

import 'main.dart' as m;

int someFunc(int x, int y) => x * y;
int get val1 => 3;
int get val2 => 4;

void main() {
  var _x = m#someFunc;
  var _v1 = m#val1;
  var _v2 = m#val2;

  print('_v1: ${_v1}, ${_v1()}');
  print('_v2: ${_v2}, ${_v2()}');
  print('_x: ${_x}, ${_x(_v1(), _v2())}');
}

分析器尚未识别语法，但代码在VM中运行良好（前沿）。另见

这两个例子都有印刷品

_v1:Closure:（）=>int来自函数“get:val1”：静态，3
_v2:Closure:（）=>int来自函数'get:val2'：静态，4
_闭包：（int，int）=>int来自函数'someFunc'：静态，12

---

根据当前的语言规范，这是一个VM错误。这与“它不是错误，它是功能！”相反=>它不是功能，它是错误！：d根据当前的语言规范，这是一个VM错误。这与“这不是错误，这是功能”相反！“=>这不是一个功能，而是一个bug！”：D