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improved error messages for special forms

This commit is contained in:
Ico Doornekamp 2023-05-21 20:18:32 +02:00
parent 8680aef42f
commit 63353b98cd
2 changed files with 18 additions and 16 deletions
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12
src/core/specials.c
View File

@ -264,7 +264,7 @@ static const Janet *janetc_make_sourcemap(JanetCompiler *c) {
static JanetSlot janetc_varset(JanetFopts opts, int32_t argn, const Janet *argv) {
if (argn != 2) {
janetc_cerror(opts.compiler, "expected 2 arguments");
janetc_cerror(opts.compiler, "expected 2 arguments to set");
return janetc_cslot(janet_wrap_nil());
}
JanetFopts subopts = janetc_fopts_default(opts.compiler);
@ -335,11 +335,11 @@ static JanetTable *handleattr(JanetCompiler *c, int32_t argn, const Janet *argv)
return tab;
}
static JanetSlot dohead(JanetCompiler *c, JanetFopts opts, Janet *head, int32_t argn, const Janet *argv) {
static JanetSlot dohead(const char *kind, JanetCompiler *c, JanetFopts opts, Janet *head, int32_t argn, const Janet *argv) {
JanetFopts subopts = janetc_fopts_default(c);
JanetSlot ret;
if (argn < 2) {
janetc_cerror(c, "expected at least 2 arguments");
janetc_error(c, janet_formatc("expected at least 2 arguments to %s", kind));
return janetc_cslot(janet_wrap_nil());
}
*head = argv[0];
@ -404,7 +404,7 @@ static JanetSlot janetc_var(JanetFopts opts, int32_t argn, const Janet *argv) {
JanetCompiler *c = opts.compiler;
Janet head;
JanetTable *attr_table = handleattr(c, argn, argv);
JanetSlot ret = dohead(c, opts, &head, argn, argv);
JanetSlot ret = dohead("var", c, opts, &head, argn, argv);
if (c->result.status == JANET_COMPILE_ERROR)
return janetc_cslot(janet_wrap_nil());
destructure(c, argv[0], ret, varleaf, attr_table);
@ -454,7 +454,7 @@ static JanetSlot janetc_def(JanetFopts opts, int32_t argn, const Janet *argv) {
Janet head;
opts.flags &= ~JANET_FOPTS_HINT;
JanetTable *attr_table = handleattr(c, argn, argv);
JanetSlot ret = dohead(c, opts, &head, argn, argv);
JanetSlot ret = dohead("def", c, opts, &head, argn, argv);
if (c->result.status == JANET_COMPILE_ERROR)
return janetc_cslot(janet_wrap_nil());
destructure(c, argv[0], ret, defleaf, attr_table);
@ -708,7 +708,7 @@ static JanetSlot janetc_while(JanetFopts opts, int32_t argn, const Janet *argv)
uint8_t ifnjmp = JOP_JUMP_IF_NOT;
if (argn < 2) {
janetc_cerror(c, "expected at least 2 arguments");
janetc_cerror(c, "expected at least 2 arguments to while");
return janetc_cslot(janet_wrap_nil());
}

22
src/core/value.c
View File

@ -439,20 +439,21 @@ int janet_compare(Janet x, Janet y) {
return status - 2;
}
static int32_t getter_checkint(Janet key, int32_t max) {
static int32_t getter_checkint(JanetType type, Janet key, int32_t max) {
if (!janet_checkint(key)) goto bad;
int32_t ret = janet_unwrap_integer(key);
if (ret < 0) goto bad;
if (ret >= max) goto bad;
return ret;
bad:
janet_panicf("expected integer key in range [0, %d), got %v", max, key);
janet_panicf("expected integer key for %s in range [0, %d), got %v", janet_type_names[type], max, key);
}
/* Gets a value and returns. Can panic. */
Janet janet_in(Janet ds, Janet key) {
Janet value;
switch (janet_type(ds)) {
JanetType type = janet_type(ds);
switch (type) {
default:
janet_panicf("expected %T, got %v", JANET_TFLAG_LENGTHABLE, ds);
break;
@ -464,19 +465,19 @@ Janet janet_in(Janet ds, Janet key) {
break;
case JANET_ARRAY: {
JanetArray *array = janet_unwrap_array(ds);
int32_t index = getter_checkint(key, array->count);
int32_t index = getter_checkint(type, key, array->count);
value = array->data[index];
break;
}
case JANET_TUPLE: {
const Janet *tuple = janet_unwrap_tuple(ds);
int32_t len = janet_tuple_length(tuple);
value = tuple[getter_checkint(key, len)];
value = tuple[getter_checkint(type, key, len)];
break;
}
case JANET_BUFFER: {
JanetBuffer *buffer = janet_unwrap_buffer(ds);
int32_t index = getter_checkint(key, buffer->count);
int32_t index = getter_checkint(type, key, buffer->count);
value = janet_wrap_integer(buffer->data[index]);
break;
}
@ -484,7 +485,7 @@ Janet janet_in(Janet ds, Janet key) {
case JANET_SYMBOL:
case JANET_KEYWORD: {
const uint8_t *str = janet_unwrap_string(ds);
int32_t index = getter_checkint(key, janet_string_length(str));
int32_t index = getter_checkint(type, key, janet_string_length(str));
value = janet_wrap_integer(str[index]);
break;
}
@ -752,13 +753,14 @@ void janet_putindex(Janet ds, int32_t index, Janet value) {
}
void janet_put(Janet ds, Janet key, Janet value) {
switch (janet_type(ds)) {
JanetType type = janet_type(ds);
switch (type) {
default:
janet_panicf("expected %T, got %v",
JANET_TFLAG_ARRAY | JANET_TFLAG_BUFFER | JANET_TFLAG_TABLE, ds);
case JANET_ARRAY: {
JanetArray *array = janet_unwrap_array(ds);
int32_t index = getter_checkint(key, INT32_MAX - 1);
int32_t index = getter_checkint(type, key, INT32_MAX - 1);
if (index >= array->count) {
janet_array_setcount(array, index + 1);
}
@ -767,7 +769,7 @@ void janet_put(Janet ds, Janet key, Janet value) {
}
case JANET_BUFFER: {
JanetBuffer *buffer = janet_unwrap_buffer(ds);
int32_t index = getter_checkint(key, INT32_MAX - 1);
int32_t index = getter_checkint(type, key, INT32_MAX - 1);
if (!janet_checkint(value))
janet_panicf("can only put integers in buffers, got %v", value);
if (index >= buffer->count) {