codesnapshot 可修复
https://github.com/robert-z/code-snapshot/blob/master/src/extension.ts
操作符优先级
Operator_Precedence
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Operator_Precedence
三目 高于 或
1 || true ? 2 : 3; // 2
1 || (true ? 2 : 3); // 1