1 | #include "mruby.h"
|
---|
2 | #include "mruby/array.h"
|
---|
3 | #include "mruby/class.h"
|
---|
4 |
|
---|
5 | /*
|
---|
6 | * call-seq:
|
---|
7 | * nil.to_a -> []
|
---|
8 | *
|
---|
9 | * Always returns an empty array.
|
---|
10 | */
|
---|
11 |
|
---|
12 | static mrb_value
|
---|
13 | nil_to_a(mrb_state *mrb, mrb_value obj)
|
---|
14 | {
|
---|
15 | return mrb_ary_new(mrb);
|
---|
16 | }
|
---|
17 |
|
---|
18 | /*
|
---|
19 | * call-seq:
|
---|
20 | * nil.to_f -> 0.0
|
---|
21 | *
|
---|
22 | * Always returns zero.
|
---|
23 | */
|
---|
24 |
|
---|
25 | static mrb_value
|
---|
26 | nil_to_f(mrb_state *mrb, mrb_value obj)
|
---|
27 | {
|
---|
28 | return mrb_float_value(mrb, 0.0);
|
---|
29 | }
|
---|
30 |
|
---|
31 | /*
|
---|
32 | * call-seq:
|
---|
33 | * nil.to_i -> 0
|
---|
34 | *
|
---|
35 | * Always returns zero.
|
---|
36 | */
|
---|
37 |
|
---|
38 | static mrb_value
|
---|
39 | nil_to_i(mrb_state *mrb, mrb_value obj)
|
---|
40 | {
|
---|
41 | return mrb_fixnum_value(0);
|
---|
42 | }
|
---|
43 |
|
---|
44 | /*
|
---|
45 | * call-seq:
|
---|
46 | * obj.instance_exec(arg...) {|var...| block } -> obj
|
---|
47 | *
|
---|
48 | * Executes the given block within the context of the receiver
|
---|
49 | * (_obj_). In order to set the context, the variable +self+ is set
|
---|
50 | * to _obj_ while the code is executing, giving the code access to
|
---|
51 | * _obj_'s instance variables. Arguments are passed as block parameters.
|
---|
52 | *
|
---|
53 | * class KlassWithSecret
|
---|
54 | * def initialize
|
---|
55 | * @secret = 99
|
---|
56 | * end
|
---|
57 | * end
|
---|
58 | * k = KlassWithSecret.new
|
---|
59 | * k.instance_exec(5) {|x| @secret+x } #=> 104
|
---|
60 | */
|
---|
61 |
|
---|
62 | static mrb_value
|
---|
63 | mrb_obj_instance_exec(mrb_state *mrb, mrb_value self)
|
---|
64 | {
|
---|
65 | mrb_value *argv;
|
---|
66 | mrb_int argc;
|
---|
67 | mrb_value blk;
|
---|
68 | struct RClass *c;
|
---|
69 |
|
---|
70 | mrb_get_args(mrb, "*&", &argv, &argc, &blk);
|
---|
71 |
|
---|
72 | if (mrb_nil_p(blk)) {
|
---|
73 | mrb_raise(mrb, E_ARGUMENT_ERROR, "no block given");
|
---|
74 | }
|
---|
75 |
|
---|
76 | switch (mrb_type(self)) {
|
---|
77 | case MRB_TT_SYMBOL:
|
---|
78 | case MRB_TT_FIXNUM:
|
---|
79 | case MRB_TT_FLOAT:
|
---|
80 | c = NULL;
|
---|
81 | break;
|
---|
82 | default:
|
---|
83 | c = mrb_class_ptr(mrb_singleton_class(mrb, self));
|
---|
84 | break;
|
---|
85 | }
|
---|
86 |
|
---|
87 | return mrb_yield_with_class(mrb, blk, argc, argv, self, c);
|
---|
88 | }
|
---|
89 |
|
---|
90 | void
|
---|
91 | mrb_mruby_object_ext_gem_init(mrb_state* mrb)
|
---|
92 | {
|
---|
93 | struct RClass * n = mrb->nil_class;
|
---|
94 |
|
---|
95 | mrb_define_method(mrb, n, "to_a", nil_to_a, MRB_ARGS_NONE());
|
---|
96 | mrb_define_method(mrb, n, "to_f", nil_to_f, MRB_ARGS_NONE());
|
---|
97 | mrb_define_method(mrb, n, "to_i", nil_to_i, MRB_ARGS_NONE());
|
---|
98 |
|
---|
99 | mrb_define_method(mrb, mrb->object_class, "instance_exec", mrb_obj_instance_exec, MRB_ARGS_ANY() | MRB_ARGS_BLOCK());
|
---|
100 | }
|
---|
101 |
|
---|
102 | void
|
---|
103 | mrb_mruby_object_ext_gem_final(mrb_state* mrb)
|
---|
104 | {
|
---|
105 | }
|
---|