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Code Issues 1 Releases Wiki Activity

Fix regression #1327

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This commit is contained in:
Calvin Rose 2023-11-14 19:52:22 -06:00
parent 1ccd544b94
commit 56f33f514b
3 changed files with 16 additions and 15 deletions
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2
src/boot/boot.janet
View File

@ -162,7 +162,7 @@
``Define a default value for an optional argument.
Expands to `(def sym (if (= nil sym) val sym))`.``
[sym val]
~(def ,sym (if (= nil ,sym) ,val ,sym)))
~(def ,sym (if (,= nil ,sym) ,val ,sym)))
(defmacro comment
"Ignores the body of the comment."

23
src/core/specials.c
View File

@ -531,17 +531,11 @@ static JanetSlot janetc_def(JanetFopts opts, int32_t argn, const Janet *argv) {
}
/* Check if a form matches the pattern (= nil _) or (not= nil _) */
static int janetc_check_nil_form(JanetFopts opts, Janet x, Janet *capture, uint32_t fun_tag) {
static int janetc_check_nil_form(Janet x, Janet *capture, uint32_t fun_tag) {
if (!janet_checktype(x, JANET_TUPLE)) return 0;
JanetTuple tup = janet_unwrap_tuple(x);
if (3 != janet_tuple_length(tup)) return 0;
Janet op1 = tup[0];
if (janet_checktype(op1, JANET_SYMBOL)) {
Janet entry = janet_table_get(opts.compiler->env, op1);
if (janet_checktype(entry, JANET_TABLE)) {
op1 = janet_table_get(janet_unwrap_table(entry), janet_ckeywordv("value"));
}
}
if (!janet_checktype(op1, JANET_FUNCTION)) return 0;
JanetFunction *fun = janet_unwrap_function(op1);
uint32_t tag = fun->def->flags & JANET_FUNCDEF_FLAG_TAG;
@ -601,10 +595,9 @@ static JanetSlot janetc_if(JanetFopts opts, int32_t argn, const Janet *argv) {
janetc_scope(&condscope, c, 0, "if");
Janet condform = argv[0];
if (janetc_check_nil_form(opts, condform, &condform, JANET_FUN_EQ)) {
if (janetc_check_nil_form(condform, &condform, JANET_FUN_EQ)) {
ifnjmp = JOP_JUMP_IF_NOT_NIL;
}
if (janetc_check_nil_form(opts, condform, &condform, JANET_FUN_NEQ)) {
} else if (janetc_check_nil_form(condform, &condform, JANET_FUN_NEQ)) {
ifnjmp = JOP_JUMP_IF_NIL;
}
@ -613,7 +606,11 @@ static JanetSlot janetc_if(JanetFopts opts, int32_t argn, const Janet *argv) {
/* Check constant condition. */
/* TODO: Use type info for more short circuits */
if (cond.flags & JANET_SLOT_CONSTANT) {
if (!janet_truthy(cond.constant)) {
int swap_condition = 0;
if (ifnjmp == JOP_JUMP_IF_NOT && !janet_truthy(cond.constant)) swap_condition = 1;
if (ifnjmp == JOP_JUMP_IF_NIL && janet_checktype(cond.constant, JANET_NIL)) swap_condition = 1;
if (ifnjmp == JOP_JUMP_IF_NOT_NIL && !janet_checktype(cond.constant, JANET_NIL)) swap_condition = 1;
if (swap_condition) {
/* Swap the true and false bodies */
Janet temp = falsebody;
falsebody = truebody;
@ -808,12 +805,12 @@ static JanetSlot janetc_while(JanetFopts opts, int32_t argn, const Janet *argv)
* jmpnl or jmpnn instructions. This let's us implement `(each ...)`
* more efficiently. */
Janet condform = argv[0];
if (janetc_check_nil_form(opts, condform, &condform, JANET_FUN_EQ)) {
if (janetc_check_nil_form(condform, &condform, JANET_FUN_EQ)) {
is_nil_form = 1;
ifjmp = JOP_JUMP_IF_NIL;
ifnjmp = JOP_JUMP_IF_NOT_NIL;
}
if (janetc_check_nil_form(opts, condform, &condform, JANET_FUN_NEQ)) {
if (janetc_check_nil_form(condform, &condform, JANET_FUN_NEQ)) {
is_notnil_form = 1;
ifjmp = JOP_JUMP_IF_NOT_NIL;
ifnjmp = JOP_JUMP_IF_NIL;

6
test/suite-specials.janet
View File

@ -198,5 +198,9 @@
(assert (= (test) '(1 ())) "issue #919")
(end-suite)
# Regression #1327
(def x "A")
(def x (if (= nil x) "B" x))
(assert (= x "A"))
(end-suite)