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add pic_set_c[ad]r

This commit is contained in:
Yuichi Nishiwaki 2014-07-13 00:23:33 +09:00
parent 7ffcbb7a7d
commit 9e8d53088f
2 changed files with 28 additions and 0 deletions
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2
include/picrin/pair.h
View File

@ -21,6 +21,8 @@ struct pic_pair {
pic_value pic_cons(pic_state *, pic_value, pic_value);
pic_value pic_car(pic_state *, pic_value);
pic_value pic_cdr(pic_state *, pic_value);
void pic_set_car(pic_state *, pic_value, pic_value);
void pic_set_cdr(pic_state *, pic_value, pic_value);
bool pic_list_p(pic_value);
pic_value pic_list1(pic_state *, pic_value);

26
src/pair.c
View File

@ -45,6 +45,32 @@ pic_cdr(pic_state *pic, pic_value obj)
return pair->cdr;
}
void
pic_set_car(pic_state *pic, pic_value obj, pic_value val)
{
struct pic_pair *pair;
if (! pic_pair_p(obj)) {
pic_error(pic, "pair required");
}
pair = pic_pair_ptr(obj);
pair->car = val;
}
void
pic_set_cdr(pic_state *pic, pic_value obj, pic_value val)
{
struct pic_pair *pair;
if (! pic_pair_p(obj)) {
pic_error(pic, "pair required");
}
pair = pic_pair_ptr(obj);
pair->cdr = val;
}
bool
pic_list_p(pic_value obj)
{