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write supports quote/quasiquote/unquote/unquote-splicing notations

This commit is contained in:
Yuichi Nishiwaki 2014-02-12 23:07:12 +09:00
parent 38c840c805
commit 170a20ef1d
1 changed files with 52 additions and 0 deletions
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52
src/write.c
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@ -10,6 +10,38 @@
static void write(pic_state *, pic_value, XFILE *file);
static bool
is_quote(pic_state *pic, pic_value pair)
{
return pic_list_p(pic, pair)
&& pic_length(pic, pair) == 2
&& pic_eq_p(pic_car(pic, pair), pic_symbol_value(pic->sQUOTE));
}
static bool
is_unquote(pic_state *pic, pic_value pair)
{
return pic_list_p(pic, pair)
&& pic_length(pic, pair) == 2
&& pic_eq_p(pic_car(pic, pair), pic_symbol_value(pic->sUNQUOTE));
}
static bool
is_unquote_splicing(pic_state *pic, pic_value pair)
{
return pic_list_p(pic, pair)
&& pic_length(pic, pair) == 2
&& pic_eq_p(pic_car(pic, pair), pic_symbol_value(pic->sUNQUOTE_SPLICING));
}
static bool
is_quasiquote(pic_state *pic, pic_value pair)
{
return pic_list_p(pic, pair)
&& pic_length(pic, pair) == 2
&& pic_eq_p(pic_car(pic, pair), pic_symbol_value(pic->sQUASIQUOTE));
}
static void
write_pair(pic_state *pic, struct pic_pair *pair, XFILE *file)
{
@ -59,6 +91,26 @@ write(pic_state *pic, pic_value obj, XFILE *file)
xfprintf(file, "#f");
break;
case PIC_TT_PAIR:
if (is_quote(pic, obj)) {
xfprintf(file, "'");
write(pic, pic_list_ref(pic, obj, 1), file);
break;
}
else if (is_unquote(pic, obj)) {
xfprintf(file, ",");
write(pic, pic_list_ref(pic, obj, 1), file);
break;
}
else if (is_unquote_splicing(pic, obj)) {
xfprintf(file, ",@");
write(pic, pic_list_ref(pic, obj, 1), file);
break;
}
else if (is_quasiquote(pic, obj)) {
xfprintf(file, "`");
write(pic, pic_list_ref(pic, obj, 1), file);
break;
}
xfprintf(file, "(");
write_pair(pic, pic_pair_ptr(obj), file);
xfprintf(file, ")");