This function is
currently not documented; only the argument list is
available.
From the ircg_eval_ecmascript_params source file:
/*
* State 0: Looking for ' or digit
* State 1: Assembling parameter inside '..'
* State 2: After escape sign: Copies single char verbatim, go to 1
* State 3: Assembling numeric para, no quotation
* State 4: Looking for ",", skipping whitespace
*/
