// p4rse, Copyright 2026, Will Hawkins
//
// This file is part of p4rse.
//
// This file is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.

import Common

public struct ExpressionStatement {
  public init() {}
}

public struct Program {
  public var types: [P4Type] = Array()

  /// Find the program's main parser
  ///
  /// Note: For now, the main parser is expected to be named main_parser.
  public func starting_parser() -> Result<Parser> {
    return self.find_parser(withName: Identifier(name: "main_parser"))
  }

  public func find_parser(withName name: Identifier) -> Result<Parser> {
    for type in self.types {
      guard let parser = type as? Parser else {
        continue
      }
      if parser.name == name {
        return .Ok(parser)
      }
    }
    return .Error(Error(withMessage: "Could not find parser named \(name)"))
  }

  public init() {}
}