jianKongXiTong/node_modules/@babel/parser/lib/util/class-scope.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = exports.ClassScope = void 0;
var _scopeflags = require("./scopeflags");
var _parseError = require("../parse-error");
class ClassScope {
  constructor() {
    this.privateNames = new Set();
    this.loneAccessors = new Map();
    this.undefinedPrivateNames = new Map();
  }
}
exports.ClassScope = ClassScope;
class ClassScopeHandler {
  constructor(parser) {
    this.parser = void 0;
    this.stack = [];
    this.undefinedPrivateNames = new Map();
    this.parser = parser;
  }
  current() {
    return this.stack[this.stack.length - 1];
  }
  enter() {
    this.stack.push(new ClassScope());
  }
  exit() {
    const oldClassScope = this.stack.pop();
    const current = this.current();
    for (const [name, loc] of Array.from(oldClassScope.undefinedPrivateNames)) {
      if (current) {
        if (!current.undefinedPrivateNames.has(name)) {
          current.undefinedPrivateNames.set(name, loc);
        }
      } else {
        this.parser.raise(_parseError.Errors.InvalidPrivateFieldResolution, {
          at: loc,
          identifierName: name
        });
      }
    }
  }
  declarePrivateName(name, elementType, loc) {
    const {
      privateNames,
      loneAccessors,
      undefinedPrivateNames
    } = this.current();
    let redefined = privateNames.has(name);
    if (elementType & _scopeflags.CLASS_ELEMENT_KIND_ACCESSOR) {
      const accessor = redefined && loneAccessors.get(name);
      if (accessor) {
        const oldStatic = accessor & _scopeflags.CLASS_ELEMENT_FLAG_STATIC;
        const newStatic = elementType & _scopeflags.CLASS_ELEMENT_FLAG_STATIC;
        const oldKind = accessor & _scopeflags.CLASS_ELEMENT_KIND_ACCESSOR;
        const newKind = elementType & _scopeflags.CLASS_ELEMENT_KIND_ACCESSOR;
        redefined = oldKind === newKind || oldStatic !== newStatic;
        if (!redefined) loneAccessors.delete(name);
      } else if (!redefined) {
        loneAccessors.set(name, elementType);
      }
    }
    if (redefined) {
      this.parser.raise(_parseError.Errors.PrivateNameRedeclaration, {
        at: loc,
        identifierName: name
      });
    }
    privateNames.add(name);
    undefinedPrivateNames.delete(name);
  }
  usePrivateName(name, loc) {
    let classScope;
    for (classScope of this.stack) {
      if (classScope.privateNames.has(name)) return;
    }
    if (classScope) {
      classScope.undefinedPrivateNames.set(name, loc);
    } else {
      this.parser.raise(_parseError.Errors.InvalidPrivateFieldResolution, {
        at: loc,
        identifierName: name
      });
    }
  }
}
exports.default = ClassScopeHandler;

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