Function stmtToDirective

packages/babel-parser/src/parser/statement.ts:140–163

* cast a Statement to a Directive. This method mutates input statement.

(stmt: N.ExpressionStatement)

   * cast a Statement to a Directive. This method mutates input statement.
   */
  stmtToDirective(stmt: N.ExpressionStatement): N.Directive {
    const directive = this.castNodeTo(stmt, "Directive");

    const directiveLiteral = this.castNodeTo(
      stmt.expression,
      "DirectiveLiteral",
    );
    const expressionValue = directiveLiteral.value;
    const raw = this.input.slice(
      this.offsetToSourcePos(directiveLiteral.start!),
      this.offsetToSourcePos(directiveLiteral.end!),
    );
    const val = (directiveLiteral.value = raw.slice(1, -1)); // remove quotes

    this.addExtra(directiveLiteral, "raw", raw);
    this.addExtra(directiveLiteral, "rawValue", val);
    this.addExtra(directiveLiteral, "expressionValue", expressionValue);

    directive.value = directiveLiteral;
    // @ts-expect-error delete non-optional properties
    delete stmt.expression;

    return directive;
  }

  parseInterpreterDirective(): N.InterpreterDirective | null {
    if (!this.match(tt.interpreterDirective)) {