while( ( ( tokens.list[tokens.length<=tokens.index+ 0 ? tokens.length-1 : tokens.index+ 0 ]
== "{" )  &&  ( tokens.list[tokens.length<=tokens.index+ 1 ? tokens.length-1 : tokens.index+ 1 ]
== "}" )  &&  ( ( tokens.list[tokens.length<=tokens.index+ 2 ? tokens.length-1 : tokens.index+ 2 ]
== "_" )  ||  ( tokens.list[tokens.length<=tokens.index+ 2 ? tokens.length-1 : tokens.index+ 2 ]
== "^" ) ) ) ) {