1 // This file is prepended to the result of compile ecmalisp.lisp, and
2 // contain runtime code that ecmalisp assumes to exist.
6 function pv (x) { return x==undefined? nil: x; }
9 var r = [].slice.call(arguments);
10 r['multiple-value'] = true;
14 function forcemv (x) {
15 return typeof x == 'object' && 'multiple-value' in x? x: mv(x);
18 // NOTE: Define VALUES to be MV for toplevel forms. It is because
19 // `eval' compiles the forms and execute the Javascript code at
20 // toplevel with `js-eval', so it is necessary to return multiple
21 // values from the eval function.
24 function checkArgsAtLeast(args, n){
25 if (args.length < n) throw 'too few arguments';
28 function checkArgsAtMost(args, n){
29 if (args.length > n) throw 'too many arguments';
32 function checkArgs(args, n){
33 checkArgsAtLeast(args, n);
34 checkArgsAtMost(args, n);
37 // Improper list constructor (like LIST*)
39 if (arguments.length == 1)
42 var i = arguments.length-1;
43 var r = arguments[i--];
45 r = {car: arguments[i], cdr: r};