System.register([], function (_export, _context) {
  "use strict";

  // comment fixes
  function attachComments(ast, comments, tokens) {
    if (comments.length) {
      var firstComment = comments[0];
      var lastComment = comments[comments.length - 1];
      // fixup program start
      if (!tokens.length) {
        // if no tokens, the program starts at the end of the last comment
        ast.start = lastComment.end;
        ast.loc.start.line = lastComment.loc.end.line;
        ast.loc.start.column = lastComment.loc.end.column;

        if (ast.leadingComments === null && ast.innerComments.length) {
          ast.leadingComments = ast.innerComments;
        }
      } else if (firstComment.start < tokens[0].start) {
        // if there are comments before the first token, the program starts at the first token
        var token = tokens[0];
        // ast.start = token.start;
        // ast.loc.start.line = token.loc.start.line;
        // ast.loc.start.column = token.loc.start.column;

        // estraverse do not put leading comments on first node when the comment
        // appear before the first token
        if (ast.body.length) {
          var node = ast.body[0];
          node.leadingComments = [];
          var firstTokenStart = token.start;
          var len = comments.length;
          for (var i = 0; i < len && comments[i].start < firstTokenStart; i++) {
            node.leadingComments.push(comments[i]);
          }
        }
      }
      // fixup program end
      if (tokens.length) {
        var lastToken = tokens[tokens.length - 1];
        if (lastComment.end > lastToken.end) {
          // If there is a comment after the last token, the program ends at the
          // last token and not the comment
          // ast.end = lastToken.end;
          ast.range[1] = lastToken.end;
          ast.loc.end.line = lastToken.loc.end.line;
          ast.loc.end.column = lastToken.loc.end.column;
        }
      }
    } else {
      if (!tokens.length) {
        ast.loc.start.line = 1;
        ast.loc.end.line = 1;
      }
    }
    if (ast.body && ast.body.length > 0 && ast.body[0].loc) {
      ast.loc.start.line = ast.body[0].loc.start.line;
      ast.range[0] = ast.body[0].start;
    }
  }

  _export("attachComments", attachComments);

  return {
    setters: [],
    execute: function () {}
  };
});