Function parseProgram

packages/babel-parser/src/parser/statement.ts:221–254

(
    this: Parser,
    program: Undone<N.Program>,
    end: TokenType,
    sourceType: SourceType,
  )

  }

  parseProgram(
    this: Parser,
    program: Undone<N.Program>,
    end: TokenType,
    sourceType: SourceType,
  ): N.Program {
    program.sourceType = sourceType;
    program.interpreter = this.parseInterpreterDirective();
    this.parseBlockBody(program, true, true, end);
    if (this.inModule) {
      if (
        !(this.optionFlags & OptionFlags.AllowUndeclaredExports) &&
        this.scope.undefinedExports.size > 0
      ) {
        for (const [localName, at] of Array.from(this.scope.undefinedExports)) {
          this.raise(Errors.ModuleExportUndefined, at, { localName });
        }
      }
      this.addExtra(program, "topLevelAwait", this.state.hasTopLevelAwait);
    }
    let finishedProgram: N.Program;
    if (end === tt.eof) {
      // finish at eof for top level program
      finishedProgram = this.finishNode(program, "Program");
    } else {
      // finish immediately before the end token
      finishedProgram = this.finishNodeAt(
        program,
        "Program",
        createPositionWithColumnOffset(this.state.startLoc, -1),
      );
    }
    return finishedProgram;
  }

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