jianKongXiTong/node_modules/@babel/parser/lib/plugins/placeholders.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;
var _types = require("../tokenizer/types");
var _parseError = require("../parse-error");
const PlaceholderErrors = (0, _parseError.ParseErrorEnum)`placeholders`({
  ClassNameIsRequired: "A class name is required.",
  UnexpectedSpace: "Unexpected space in placeholder."
});
var _default = superClass => class PlaceholdersParserMixin extends superClass {
  parsePlaceholder(expectedNode) {
    if (this.match(142)) {
      const node = this.startNode();
      this.next();
      this.assertNoSpace();
      node.name = super.parseIdentifier(true);
      this.assertNoSpace();
      this.expect(142);
      return this.finishPlaceholder(node, expectedNode);
    }
  }
  finishPlaceholder(node, expectedNode) {
    const isFinished = !!(node.expectedNode && node.type === "Placeholder");
    node.expectedNode = expectedNode;
    return isFinished ? node : this.finishNode(node, "Placeholder");
  }
  getTokenFromCode(code) {
    if (code === 37 && this.input.charCodeAt(this.state.pos + 1) === 37) {
      this.finishOp(142, 2);
    } else {
      super.getTokenFromCode(code);
    }
  }
  parseExprAtom(refExpressionErrors) {
    return this.parsePlaceholder("Expression") || super.parseExprAtom(refExpressionErrors);
  }
  parseIdentifier(liberal) {
    return this.parsePlaceholder("Identifier") || super.parseIdentifier(liberal);
  }
  checkReservedWord(word, startLoc, checkKeywords, isBinding) {
    if (word !== undefined) {
      super.checkReservedWord(word, startLoc, checkKeywords, isBinding);
    }
  }
  parseBindingAtom() {
    return this.parsePlaceholder("Pattern") || super.parseBindingAtom();
  }
  isValidLVal(type, isParenthesized, binding) {
    return type === "Placeholder" || super.isValidLVal(type, isParenthesized, binding);
  }
  toAssignable(node, isLHS) {
    if (node && node.type === "Placeholder" && node.expectedNode === "Expression") {
      node.expectedNode = "Pattern";
    } else {
      super.toAssignable(node, isLHS);
    }
  }
  chStartsBindingIdentifier(ch, pos) {
    if (super.chStartsBindingIdentifier(ch, pos)) {
      return true;
    }
    const nextToken = this.lookahead();
    if (nextToken.type === 142) {
      return true;
    }
    return false;
  }
  verifyBreakContinue(node, isBreak) {
    if (node.label && node.label.type === "Placeholder") return;
    super.verifyBreakContinue(node, isBreak);
  }
  parseExpressionStatement(node, expr) {
    if (expr.type !== "Placeholder" || expr.extra && expr.extra.parenthesized) {
      return super.parseExpressionStatement(node, expr);
    }
    if (this.match(14)) {
      const stmt = node;
      stmt.label = this.finishPlaceholder(expr, "Identifier");
      this.next();
      stmt.body = super.parseStatementOrSloppyAnnexBFunctionDeclaration();
      return this.finishNode(stmt, "LabeledStatement");
    }
    this.semicolon();
    node.name = expr.name;
    return this.finishPlaceholder(node, "Statement");
  }
  parseBlock(allowDirectives, createNewLexicalScope, afterBlockParse) {
    return this.parsePlaceholder("BlockStatement") || super.parseBlock(allowDirectives, createNewLexicalScope, afterBlockParse);
  }
  parseFunctionId(requireId) {
    return this.parsePlaceholder("Identifier") || super.parseFunctionId(requireId);
  }
  parseClass(node, isStatement, optionalId) {
    const type = isStatement ? "ClassDeclaration" : "ClassExpression";
    this.next();
    const oldStrict = this.state.strict;
    const placeholder = this.parsePlaceholder("Identifier");
    if (placeholder) {
      if (this.match(81) || this.match(142) || this.match(5)) {
        node.id = placeholder;
      } else if (optionalId || !isStatement) {
        node.id = null;
        node.body = this.finishPlaceholder(placeholder, "ClassBody");
        return this.finishNode(node, type);
      } else {
        throw this.raise(PlaceholderErrors.ClassNameIsRequired, {
          at: this.state.startLoc
        });
      }
    } else {
      this.parseClassId(node, isStatement, optionalId);
    }
    super.parseClassSuper(node);
    node.body = this.parsePlaceholder("ClassBody") || super.parseClassBody(!!node.superClass, oldStrict);
    return this.finishNode(node, type);
  }
  parseExport(node, decorators) {
    const placeholder = this.parsePlaceholder("Identifier");
    if (!placeholder) return super.parseExport(node, decorators);
    if (!this.isContextual(97) && !this.match(12)) {
      node.specifiers = [];
      node.source = null;
      node.declaration = this.finishPlaceholder(placeholder, "Declaration");
      return this.finishNode(node, "ExportNamedDeclaration");
    }
    this.expectPlugin("exportDefaultFrom");
    const specifier = this.startNode();
    specifier.exported = placeholder;
    node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")];
    return super.parseExport(node, decorators);
  }
  isExportDefaultSpecifier() {
    if (this.match(65)) {
      const next = this.nextTokenStart();
      if (this.isUnparsedContextual(next, "from")) {
        if (this.input.startsWith((0, _types.tokenLabelName)(142), this.nextTokenStartSince(next + 4))) {
          return true;
        }
      }
    }
    return super.isExportDefaultSpecifier();
  }
  maybeParseExportDefaultSpecifier(node, maybeDefaultIdentifier) {
    var _specifiers;
    if ((_specifiers = node.specifiers) != null && _specifiers.length) {
      return true;
    }
    return super.maybeParseExportDefaultSpecifier(node, maybeDefaultIdentifier);
  }
  checkExport(node) {
    const {
      specifiers
    } = node;
    if (specifiers != null && specifiers.length) {
      node.specifiers = specifiers.filter(node => node.exported.type === "Placeholder");
    }
    super.checkExport(node);
    node.specifiers = specifiers;
  }
  parseImport(node) {
    const placeholder = this.parsePlaceholder("Identifier");
    if (!placeholder) return super.parseImport(node);
    node.specifiers = [];
    if (!this.isContextual(97) && !this.match(12)) {
      node.source = this.finishPlaceholder(placeholder, "StringLiteral");
      this.semicolon();
      return this.finishNode(node, "ImportDeclaration");
    }
    const specifier = this.startNodeAtNode(placeholder);
    specifier.local = placeholder;
    node.specifiers.push(this.finishNode(specifier, "ImportDefaultSpecifier"));
    if (this.eat(12)) {
      const hasStarImport = this.maybeParseStarImportSpecifier(node);
      if (!hasStarImport) this.parseNamedImportSpecifiers(node);
    }
    this.expectContextual(97);
    node.source = this.parseImportSource();
    this.semicolon();
    return this.finishNode(node, "ImportDeclaration");
  }
  parseImportSource() {
    return this.parsePlaceholder("StringLiteral") || super.parseImportSource();
  }
  assertNoSpace() {
    if (this.state.start > this.state.lastTokEndLoc.index) {
      this.raise(PlaceholderErrors.UnexpectedSpace, {
        at: this.state.lastTokEndLoc
      });
    }
  }
};
exports.default = _default;

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