nl_tokens: Throw a syntax error in the current position
pl_tokens: function throwSyntaxError ( message , errorLine , <mask> ) { errorLine = errorLine === undefined ? line : errorLine size = size === undefined ? 1 : size var snippet = getSnippet ( source , errorLine , size ) , err = new SyntaxError ( message + '\n' + snippet ) err . line = errorLine throw err }