import defineInspect from "../jsutils/defineInspect.mjs";

/**
 * Contains a range of UTF-8 character offsets and token references that
 * identify the region of the source from which the AST derived.
 */
export var Location = /*#__PURE__*/function () {
  /**
   * The character offset at which this Node begins.
   */

  /**
   * The character offset at which this Node ends.
   */

  /**
   * The Token at which this Node begins.
   */

  /**
   * The Token at which this Node ends.
   */

  /**
   * The Source document the AST represents.
   */
  function Location(startToken, endToken, source) {
    this.start = startToken.start;
    this.end = endToken.end;
    this.startToken = startToken;
    this.endToken = endToken;
    this.source = source;
  }

  var _proto = Location.prototype;

  _proto.toJSON = function toJSON() {
    return {
      start: this.start,
      end: this.end
    };
  };

  return Location;
}(); // Print a simplified form when appearing in `inspect` and `util.inspect`.

defineInspect(Location);
/**
 * Represents a range of characters represented by a lexical token
 * within a Source.
 */

export var Token = /*#__PURE__*/function () {
  /**
   * The kind of Token.
   */

  /**
   * The character offset at which this Node begins.
   */

  /**
   * The character offset at which this Node ends.
   */

  /**
   * The 1-indexed line number on which this Token appears.
   */

  /**
   * The 1-indexed column number at which this Token begins.
   */

  /**
   * For non-punctuation tokens, represents the interpreted value of the token.
   */

  /**
   * Tokens exist as nodes in a double-linked-list amongst all tokens
   * including ignored tokens. <SOF> is always the first node and <EOF>
   * the last.
   */
  function Token(kind, start, end, line, column, prev, value) {
    this.kind = kind;
    this.start = start;
    this.end = end;
    this.line = line;
    this.column = column;
    this.value = value;
    this.prev = prev;
    this.next = null;
  }

  var _proto2 = Token.prototype;

  _proto2.toJSON = function toJSON() {
    return {
      kind: this.kind,
      value: this.value,
      line: this.line,
      column: this.column
    };
  };

  return Token;
}(); // Print a simplified form when appearing in `inspect` and `util.inspect`.

defineInspect(Token);
/**
 * @internal
 */

export function isNode(maybeNode) {
  return maybeNode != null && typeof maybeNode.kind === 'string';
}
/**
 * The list of all possible AST node types.
 */