nl_tokens: Mixin source map support into compiler .
pl_tokens: function mixin ( compiler ) { define ( compiler , '_comment' , compiler . comment ) ; compiler . map = new utils . SourceMap . SourceMapGenerator ( ) ; compiler . position = { line : 1 , <mask> : 1 } ; compiler . content = { } ; compiler . files = { } ; for ( var key in exports ) { define ( compiler , key , exports [ key ] ) ; } }