heredoc macro

comment.js

macro <<EOS {
  case { $_ } => {
    var comments = #{$_}[0].token.leadingComments;
    var text = '';
    if (comments) {
      text = comments.map(function(c) {
        return c.type === 'Block' ? c.value.replace(/^(\r\n|\n|\r)/, '').replace(/(\r\n|\n|\r)$/, '') : c.value;
      }).join('\r\n');
    }
    return [makeValue(text, #{here})];
  }
}

console.log(/*
abcdefg
hijklmn
あいうえお
*/<<EOS);

console.log(<<EOS);

console.log(
//abcdefg
//hijklmn
//あいうえお
<<EOS);