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Code Issues 1 Releases Wiki Activity

Support redefinable bindings

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This commit is contained in:
Michael Camilleri 2021-12-18 13:05:16 +09:00
parent cddc2a8280
commit 8347439644
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GPG Key ID: 7EB218A48DF8B572
5 changed files with 60 additions and 18 deletions
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8
src/core/compile.c
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@ -239,6 +239,12 @@ JanetSlot janetc_resolve(
case JANET_BINDING_MACRO: /* Macro should function like defs when not in calling pos */
ret = janetc_cslot(binding.value);
break;
case JANET_BINDING_DEF_REF:
case JANET_BINDING_MACRO_REF:
ret = janetc_cslot(binding.value);
ret.flags |= JANET_SLOT_REF | JANET_SLOT_NAMED | JANET_SLOTTYPE_ANY;
ret.flags &= ~JANET_SLOT_CONSTANT;
break;
case JANET_BINDING_VAR: {
ret = janetc_cslot(binding.value);
ret.flags |= JANET_SLOT_REF | JANET_SLOT_NAMED | JANET_SLOT_MUTABLE | JANET_SLOTTYPE_ANY;
@ -651,7 +657,7 @@ static int macroexpand1(
}
Janet macroval;
JanetBindingType btype = janet_resolve(c->env, name, &macroval);
if (btype != JANET_BINDING_MACRO ||
if (!(btype == JANET_BINDING_MACRO || btype == JANET_BINDING_MACRO_REF) ||
!janet_checktype(macroval, JANET_FUNCTION))
return 0;

23
src/core/specials.c
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@ -331,14 +331,27 @@ static int defleaf(
JanetTable *entry = janet_table_clone(tab);
janet_table_put(entry, janet_ckeywordv("source-map"),
janet_wrap_tuple(janetc_make_sourcemap(c)));
JanetSlot valsym = janetc_cslot(janet_ckeywordv("value"));
JanetSlot tabslot = janetc_cslot(janet_wrap_table(entry));
if (!janet_checktype(janet_table_get(entry, janet_ckeywordv("redef")), JANET_NIL)) {
JanetBinding binding = janet_resolve_ext(c->env, sym);
JanetArray *ref;
if (janet_checktype(binding.value, JANET_ARRAY)) {
ref = janet_unwrap_array(binding.value);
} else {
ref = janet_array(1);
janet_array_push(ref, janet_wrap_nil());
}
janet_table_put(entry, janet_ckeywordv("ref"), janet_wrap_array(ref));
JanetSlot refslot = janetc_cslot(janet_wrap_array(ref));
janetc_emit_ssu(c, JOP_PUT_INDEX, refslot, s, 0, 0);
} else {
JanetSlot valsym = janetc_cslot(janet_ckeywordv("value"));
JanetSlot tabslot = janetc_cslot(janet_wrap_table(entry));
janetc_emit_sss(c, JOP_PUT, tabslot, valsym, s, 0);
}
/* Add env entry to env */
janet_table_put(c->env, janet_wrap_symbol(sym), janet_wrap_table(entry));
/* Put value in table when evaulated */
janetc_emit_sss(c, JOP_PUT, tabslot, valsym, s, 0);
}
return namelocal(c, sym, 0, s);
}

30
src/core/util.c
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@ -627,23 +627,31 @@ JanetBinding janet_resolve_ext(JanetTable *env, const uint8_t *sym) {
binding.deprecation = JANET_BINDING_DEP_NORMAL;
}
if (!janet_checktype(
janet_table_get(entry_table, janet_ckeywordv("macro")),
JANET_NIL)) {
ref = janet_table_get(entry_table, janet_ckeywordv("ref"));
int is_value = !janet_checktype(ref, JANET_ARRAY);
int is_macro = !janet_checktype(janet_table_get(entry_table, janet_ckeywordv("macro")), JANET_NIL);
int is_redef = !janet_checktype(janet_table_get(entry_table, janet_ckeywordv("redef")), JANET_NIL);
if (is_redef && is_value) {
/* invalid, return empty binding */
return binding;
} else if (is_macro && is_redef) {
binding.value = ref;
binding.type = JANET_BINDING_MACRO_REF;
} else if (is_macro) {
binding.value = janet_table_get(entry_table, janet_ckeywordv("value"));
binding.type = JANET_BINDING_MACRO;
return binding;
}
ref = janet_table_get(entry_table, janet_ckeywordv("ref"));
if (janet_checktype(ref, JANET_ARRAY)) {
} else if (is_redef) {
binding.value = ref;
binding.type = JANET_BINDING_DEF_REF;
} else if (is_value) {
binding.value = janet_table_get(entry_table, janet_ckeywordv("value"));
binding.type = JANET_BINDING_DEF;
} else {
binding.value = ref;
binding.type = JANET_BINDING_VAR;
return binding;
}
binding.value = janet_table_get(entry_table, janet_ckeywordv("value"));
binding.type = JANET_BINDING_DEF;
return binding;
}

4
src/include/janet.h
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@ -1779,7 +1779,9 @@ typedef enum {
JANET_BINDING_NONE,
JANET_BINDING_DEF,
JANET_BINDING_VAR,
JANET_BINDING_MACRO
JANET_BINDING_MACRO,
JANET_BINDING_DEF_REF,
JANET_BINDING_MACRO_REF
} JanetBindingType;
typedef struct {

13
test/suite0000.janet
View File

@ -295,6 +295,19 @@
(++ i))
(assert (= i 6) "when macro"))
# Redefs
(def noredef 0)
(defn noredef-inc [] (+ 1 noredef))
(assert (= 1 (noredef-inc)) "result before redef without :redef")
(def noredef 1)
(assert (= 1 (noredef-inc)) "result after redef without :redef")
(def redef :redef 0)
(defn redef-inc [] (+ 1 redef))
(assert (= 1 (redef-inc)) "result before redef with :redef")
(def redef :redef 1)
(assert (= 2 (redef-inc)) "result before redef with :redef")
# Denormal tables and structs
(assert (= (length {1 2 nil 3}) 1) "nil key struct literal")