// Copyright (C) 2024 Rubén Beltrán del Río

// This program 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://map.tranquil.systems.
extension Wmap {
  enum TokenType: CaseIterable {
    case vertexLabel
    case edgeUndirected  // --
    case edgeDirected  // ->
    case leftParen, rightParen
    case leftBracket, rightBracket
    case comma
    case plus, minus
    case realNumber
    case stageNumber  // i, ii, iii, iv
    case shapeLabel  // x, square, triangle, circle
    case noteKeyword  // [Note]
    case groupKeyword  // [Group]
    case inertiaKeyword  // [Inertia]
    case evolutionKeyword  // [Evolution]
    case text  // free text until newline
    case newline
    case eof
    case error  // invalid token that should cause line to be ignored
  }
}