Function getExpression

packages/babel-parser/src/parser/expression.ts:156–177

(this: Parser)

  // Convenience method to parse an Expression only
  getExpression(this: Parser): N.Expression & N.ParserOutput {
    this.enterInitialScopes();
    this.nextToken();
    if (this.match(tt.eof)) {
      throw this.raise(Errors.ParseExpressionEmptyInput, this.state.startLoc);
    }
    const expr = this.parseExpression() as N.Expression & N.ParserOutput;
    if (!this.match(tt.eof)) {
      throw this.raise(Errors.ParseExpressionExpectsEOF, this.state.startLoc, {
        unexpected: this.input.codePointAt(this.state.start)!,
      });
    }
    // Unlike parseTopLevel, we need to drain remaining commentStacks
    // because the top level node is _not_ Program.
    this.finalizeRemainingComments();
    expr.comments = this.comments;
    expr.errors = this.state.errors;
    if (this.optionFlags & OptionFlags.Tokens) {
      expr.tokens = createExportedTokens(this.tokens);
    }
    return expr;
  }

  // ### Expression parsing