static VALUE
curry(VALUE dummy, VALUE args, int argc, VALUE *argv)
{
VALUE proc, passed, arity;
proc = RARRAY_AT(args, 0);
passed = RARRAY_AT(args, 1);
arity = RARRAY_AT(args, 2);
passed = rb_ary_plus(passed, rb_ary_new4(argc, argv));
rb_ary_freeze(passed);
if(RARRAY_LEN(passed) < FIX2INT(arity)) {
arity = make_curry_proc(proc, passed, arity);
return arity;
}
arity = rb_proc_call(proc, passed);
return arity;
}
static VALUE
curry(VALUE dummy, VALUE args, int argc, VALUE *argv, VALUE passed_proc)
{
VALUE proc, passed, arity;
proc = RARRAY_PTR(args)[0];
passed = RARRAY_PTR(args)[1];
arity = RARRAY_PTR(args)[2];
passed = rb_ary_plus(passed, rb_ary_new4(argc, argv));
rb_ary_freeze(passed);
if(RARRAY_LEN(passed) < FIX2INT(arity)) {
if (!NIL_P(passed_proc)) {
rb_warn("given block not used");
}
arity = make_curry_proc(proc, passed, arity);
return arity;
}
else {
return rb_proc_call_with_block(proc, RARRAY_LEN(passed), RARRAY_PTR(passed), passed_proc);
}
}
/*
* call-seq:
* prc.curry => a_proc
* prc.curry(arity) => a_proc
*
* Returns a curried proc. If the optional <i>arity</i> argument is given,
* it determines the number of arguments.
* A curried proc receives some arguments. If a sufficient number of
* arguments are supplied, it passes the supplied arguments to the original
* proc and returns the result. Otherwise, returns another curried proc that
* takes the rest of arguments.
*
* b = proc {|x, y, z| (x||0) + (y||0) + (z||0) }
* p b.curry[1][2][3] #=> 6
* p b.curry[1, 2][3, 4] #=> 6
* p b.curry(5)[1][2][3][4][5] #=> 6
* p b.curry(5)[1, 2][3, 4][5] #=> 6
* p b.curry(1)[1] #=> 1
*
* b = proc {|x, y, z, *w| (x||0) + (y||0) + (z||0) + w.inject(0, &:+) }
* p b.curry[1][2][3] #=> 6
* p b.curry[1, 2][3, 4] #=> 10
* p b.curry(5)[1][2][3][4][5] #=> 15
* p b.curry(5)[1, 2][3, 4][5] #=> 15
* p b.curry(1)[1] #=> 1
*
* b = lambda {|x, y, z| (x||0) + (y||0) + (z||0) }
* p b.curry[1][2][3] #=> 6
* p b.curry[1, 2][3, 4] #=> wrong number of arguments (4 or 3)
* p b.curry(5) #=> wrong number of arguments (5 or 3)
* p b.curry(1) #=> wrong number of arguments (1 or 3)
*
* b = lambda {|x, y, z, *w| (x||0) + (y||0) + (z||0) + w.inject(0, &:+) }
* p b.curry[1][2][3] #=> 6
* p b.curry[1, 2][3, 4] #=> 10
* p b.curry(5)[1][2][3][4][5] #=> 15
* p b.curry(5)[1, 2][3, 4][5] #=> 15
* p b.curry(1) #=> wrong number of arguments (1 or 3)
*
* b = proc { :foo }
* p b.curry[] #=> :foo
*/
static VALUE
proc_curry(int argc, VALUE *argv, VALUE self)
{
int sarity, marity = FIX2INT(proc_arity(self));
VALUE arity, opt = Qfalse;
if (marity < 0) {
marity = -marity - 1;
opt = Qtrue;
}
rb_scan_args(argc, argv, "01", &arity);
if (NIL_P(arity)) {
arity = INT2FIX(marity);
}
else {
sarity = FIX2INT(arity);
if (proc_lambda_p(self) && (sarity < marity || (sarity > marity && !opt))) {
rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", sarity, marity);
}
}
return make_curry_proc(self, rb_ary_new(), arity);
}