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-rw-r--r--erts/emulator/beam/erl_db_util.c316
-rw-r--r--erts/emulator/beam/erl_map.c91
-rw-r--r--erts/emulator/beam/erl_map.h12
-rw-r--r--erts/emulator/beam/erl_nif.c8
-rw-r--r--erts/emulator/test/match_spec_SUITE.erl29
5 files changed, 338 insertions, 118 deletions
diff --git a/erts/emulator/beam/erl_db_util.c b/erts/emulator/beam/erl_db_util.c
index 3927615e04..b9fd3b208e 100644
--- a/erts/emulator/beam/erl_db_util.c
+++ b/erts/emulator/beam/erl_db_util.c
@@ -198,11 +198,6 @@ set_match_trace(Process *tracee_p, Eterm fail_term, Eterm tracer,
return ret;
}
-
-/* Type checking... */
-
-#define BOXED_IS_TUPLE(Boxed) is_arity_value(*boxed_val((Boxed)))
-
/*
**
** Types and enum's (compiled matches)
@@ -218,6 +213,8 @@ typedef enum {
matchTuple,
matchPushT,
matchPushL,
+ matchPushM,
+ matchPushK,
matchPop,
matchBind,
matchCmp,
@@ -227,11 +224,13 @@ typedef enum {
matchEqRef,
matchEq,
matchList,
+ matchMap,
matchSkip,
matchPushC,
matchConsA, /* Car is below Cdr */
matchConsB, /* Cdr is below Car (unusual) */
matchMkTuple,
+ matchMkMap,
matchCall0,
matchCall1,
matchCall2,
@@ -856,6 +855,13 @@ static int match_compact(ErlHeapFragment *expr, DMCErrInfo *err_info);
static Uint my_size_object(Eterm t);
static Eterm my_copy_struct(Eterm t, Eterm **hp, ErlOffHeap* off_heap);
+/* Guard subroutines */
+static void
+dmc_rearrange_constants(DMCContext *context, DMC_STACK_TYPE(UWord) *text,
+ int textpos, Eterm *p, Uint nelems);
+static DMCRet
+dmc_array(DMCContext *context, DMCHeap *heap, DMC_STACK_TYPE(UWord) *text,
+ Eterm *p, Uint nelems, int *constant);
/* Guard compilation */
static void do_emit_constant(DMCContext *context, DMC_STACK_TYPE(UWord) *text,
Eterm t);
@@ -869,6 +875,9 @@ static DMCRet dmc_tuple(DMCContext *context,
DMC_STACK_TYPE(UWord) *text,
Eterm t,
int *constant);
+static DMCRet
+dmc_map(DMCContext *context, DMCHeap *heap, DMC_STACK_TYPE(UWord) *text,
+ Eterm t, int *constant);
static DMCRet dmc_variable(DMCContext *context,
DMCHeap *heap,
DMC_STACK_TYPE(UWord) *text,
@@ -888,12 +897,14 @@ static DMCRet compile_guard_expr(DMCContext *context,
DMCHeap *heap,
DMC_STACK_TYPE(UWord) *text,
Eterm t);
-/* match expression subroutine */
+/* match expression subroutines */
static DMCRet dmc_one_term(DMCContext *context,
DMCHeap *heap,
DMC_STACK_TYPE(Eterm) *stack,
DMC_STACK_TYPE(UWord) *text,
Eterm c);
+static Eterm
+dmc_private_copy(DMCContext *context, Eterm c);
#ifdef DMC_DEBUG
@@ -1364,7 +1375,51 @@ restart:
for (;;) {
switch (t & _TAG_PRIMARY_MASK) {
case TAG_PRIMARY_BOXED:
- if (!BOXED_IS_TUPLE(t)) {
+ if (is_map(t)) {
+ num_iters = map_get_size(map_val(t));
+ if (!structure_checked) {
+ DMC_PUSH(text, matchMap);
+ DMC_PUSH(text, num_iters);
+ }
+ structure_checked = 0;
+ for (i = 0; i < num_iters; ++i) {
+ Eterm key = map_get_keys(map_val(t))[i];
+ if (db_is_variable(key) >= 0) {
+ if (context.err_info) {
+ add_dmc_err(context.err_info,
+ "Variable found in map key.",
+ -1, 0UL, dmcError);
+ }
+ goto error;
+ } else if (key == am_Underscore) {
+ if (context.err_info) {
+ add_dmc_err(context.err_info,
+ "Underscore found in map key.",
+ -1, 0UL, dmcError);
+ }
+ goto error;
+ }
+ DMC_PUSH(text, matchPushK);
+ ++(context.stack_used);
+ DMC_PUSH(text, dmc_private_copy(&context, key));
+ }
+ if (context.stack_used > context.stack_need) {
+ context.stack_need = context.stack_used;
+ }
+ for (i = num_iters; i--; ) {
+ Eterm value = map_get_values(map_val(t))[i];
+ DMC_PUSH(text, matchPop);
+ --(context.stack_used);
+ res = dmc_one_term(&context, &heap, &stack, &text,
+ value);
+ ASSERT(res != retFail);
+ if (res == retRestart) {
+ goto restart;
+ }
+ }
+ break;
+ }
+ if (!is_tuple(t)) {
goto simple_term;
}
num_iters = arityval(*tuple_val(t));
@@ -1715,10 +1770,8 @@ Eterm db_prog_match(Process *c_p, Binary *bprog,
Uint32 *return_flags)
{
MatchProg *prog = Binary2MatchProg(bprog);
- Eterm *ep;
- Eterm *tp;
+ const Eterm *ep, *tp, **sp;
Eterm t;
- Eterm **sp;
Eterm *esp;
MatchVariable* variables;
BeamInstr *cp;
@@ -1808,7 +1861,7 @@ Eterm db_prog_match(Process *c_p, Binary *bprog,
restart:
ep = &term;
esp = (Eterm*)((char*)mpsp->u.heap + prog->stack_offset);
- sp = (Eterm **) esp;
+ sp = (const Eterm **)esp;
ret = am_true;
do_catch = 0;
fail_label = -1;
@@ -1887,6 +1940,34 @@ restart:
*sp++ = list_val_rel(*ep,base);
++ep;
break;
+ case matchMap:
+ if (!is_map_rel(*ep, base)) {
+ FAIL();
+ }
+ n = *pc++;
+ if (map_get_size(map_val_rel(*ep, base)) < n) {
+ FAIL();
+ }
+ ep = map_val_rel(*ep, base);
+ break;
+ case matchPushM:
+ if (!is_map_rel(*ep, base)) {
+ FAIL();
+ }
+ n = *pc++;
+ if (map_get_size(map_val_rel(*ep, base)) < n) {
+ FAIL();
+ }
+ *sp++ = map_val_rel(*ep++, base);
+ break;
+ case matchPushK:
+ t = (Eterm) *pc++;
+ tp = erts_maps_get_rel(t, make_map_rel(ep, base), base);
+ if (!tp) {
+ FAIL();
+ }
+ *sp++ = tp;
+ break;
case matchPop:
ep = *(--sp);
break;
@@ -1987,6 +2068,23 @@ restart:
}
*esp++ = t;
break;
+ case matchMkMap:
+ n = *pc++;
+ ehp = HAllocX(build_proc, 1 + MAP_HEADER_SIZE + n, HEAP_XTRA);
+ t = *ehp++ = *--esp;
+ {
+ map_t *m = (map_t *)ehp;
+ m->thing_word = MAP_HEADER;
+ m->size = n;
+ m->keys = t;
+ }
+ t = make_map(ehp);
+ ehp += MAP_HEADER_SIZE;
+ while (n--) {
+ *ehp++ = *--esp;
+ }
+ *esp++ = t;
+ break;
case matchCall0:
bif = (Eterm (*)(Process*, ...)) *pc++;
t = (*bif)(build_proc, bif_args);
@@ -3168,7 +3266,7 @@ int db_has_variable(Eterm obj)
return(db_has_variable(obj)); /* Non wellformed list or [] */
}
case TAG_PRIMARY_BOXED:
- if (!BOXED_IS_TUPLE(obj)) {
+ if (!is_tuple(obj)) {
return 0;
} else {
Eterm *tuple = tuple_val(obj);
@@ -3243,7 +3341,6 @@ static DMCRet dmc_one_term(DMCContext *context,
{
Sint n;
Eterm *hp;
- ErlHeapFragment *tmp_mb;
Uint sz, sz2, sz3;
Uint i, j;
@@ -3334,6 +3431,13 @@ static DMCRet dmc_one_term(DMCContext *context,
DMC_PUSH(*text, n);
DMC_PUSH(*stack, c);
break;
+ case (_TAG_HEADER_MAP >> _TAG_PRIMARY_SIZE):
+ n = map_get_size(map_val(c));
+ DMC_PUSH(*text, matchPushM);
+ ++(context->stack_used);
+ DMC_PUSH(*text, n);
+ DMC_PUSH(*stack, c);
+ break;
case (_TAG_HEADER_REF >> _TAG_PRIMARY_SIZE):
{
Eterm* ref_val = internal_ref_val(c);
@@ -3415,16 +3519,8 @@ static DMCRet dmc_one_term(DMCContext *context,
#endif
break;
default: /* BINARY, FUN, VECTOR, or EXTERNAL */
- /*
- ** Make a private copy...
- */
- n = size_object(c);
- tmp_mb = new_message_buffer(n);
- hp = tmp_mb->mem;
DMC_PUSH(*text, matchEqBin);
- DMC_PUSH(*text, copy_struct(c, n, &hp, &(tmp_mb->off_heap)));
- tmp_mb->next = context->save;
- context->save = tmp_mb;
+ DMC_PUSH(*text, dmc_private_copy(context, c));
break;
}
break;
@@ -3437,6 +3533,22 @@ static DMCRet dmc_one_term(DMCContext *context,
}
/*
+** Make a private copy of a term in a context.
+*/
+
+static Eterm
+dmc_private_copy(DMCContext *context, Eterm c)
+{
+ Uint n = size_object(c);
+ ErlHeapFragment *tmp_mb = new_message_buffer(n);
+ Eterm *hp = tmp_mb->mem;
+ Eterm copy = copy_struct(c, n, &hp, &(tmp_mb->off_heap));
+ tmp_mb->next = context->save;
+ context->save = tmp_mb;
+ return copy;
+}
+
+/*
** Match guard compilation
*/
@@ -3527,57 +3639,78 @@ static DMCRet dmc_list(DMCContext *context,
return retOk;
}
-static DMCRet dmc_tuple(DMCContext *context,
- DMCHeap *heap,
- DMC_STACK_TYPE(UWord) *text,
- Eterm t,
- int *constant)
+static void
+dmc_rearrange_constants(DMCContext *context, DMC_STACK_TYPE(UWord) *text,
+ int textpos, Eterm *p, Uint nelems)
{
DMC_STACK_TYPE(UWord) instr_save;
+ Uint i;
+
+ DMC_INIT_STACK(instr_save);
+ while (DMC_STACK_NUM(*text) > textpos) {
+ DMC_PUSH(instr_save, DMC_POP(*text));
+ }
+ for (i = nelems; i--;) {
+ do_emit_constant(context, text, p[i]);
+ }
+ while(!DMC_EMPTY(instr_save)) {
+ DMC_PUSH(*text, DMC_POP(instr_save));
+ }
+ DMC_FREE(instr_save);
+}
+
+static DMCRet
+dmc_array(DMCContext *context, DMCHeap *heap, DMC_STACK_TYPE(UWord) *text,
+ Eterm *p, Uint nelems, int *constant)
+{
int all_constant = 1;
int textpos = DMC_STACK_NUM(*text);
- Eterm *p = tuple_val(t);
- Uint nelems = arityval(*p);
Uint i;
- int c;
- DMCRet ret;
/*
- ** We remember where we started to layout code,
+ ** We remember where we started to layout code,
** assume all is constant and back up and restart if not so.
- ** The tuple should be laid out with the last element first,
- ** so we can memcpy the tuple to the eheap.
+ ** The array should be laid out with the last element first,
+ ** so we can memcpy it to the eheap.
*/
- for (i = nelems; i > 0; --i) {
- if ((ret = dmc_expr(context, heap, text, p[i], &c)) != retOk)
- return ret;
- if (!c && all_constant) {
- all_constant = 0;
- if (i < nelems) {
- Uint j;
+ for (i = nelems; i--;) {
+ DMCRet ret;
+ int c;
- /*
- * Oops, we need to relayout the constants.
- * Save the already laid out instructions.
- */
- DMC_INIT_STACK(instr_save);
- while (DMC_STACK_NUM(*text) > textpos)
- DMC_PUSH(instr_save, DMC_POP(*text));
- for (j = nelems; j > i; --j)
- do_emit_constant(context, text, p[j]);
- while(!DMC_EMPTY(instr_save))
- DMC_PUSH(*text, DMC_POP(instr_save));
- DMC_FREE(instr_save);
- }
- } else if (c && !all_constant) {
- /* push a constant */
- do_emit_constant(context, text, p[i]);
- }
+ ret = dmc_expr(context, heap, text, p[i], &c);
+ if (ret != retOk) {
+ return ret;
+ }
+ if (!c && all_constant) {
+ all_constant = 0;
+ if (i < nelems - 1) {
+ dmc_rearrange_constants(context, text, textpos,
+ p + i + 1, nelems - i - 1);
+ }
+ } else if (c && !all_constant) {
+ do_emit_constant(context, text, p[i]);
+ }
+ }
+ *constant = all_constant;
+ return retOk;
+}
+
+static DMCRet
+dmc_tuple(DMCContext *context, DMCHeap *heap, DMC_STACK_TYPE(UWord) *text,
+ Eterm t, int *constant)
+{
+ int all_constant;
+ Eterm *p = tuple_val(t);
+ Uint nelems = arityval(*p);
+ DMCRet ret;
+
+ ret = dmc_array(context, heap, text, p + 1, nelems, &all_constant);
+ if (ret != retOk) {
+ return ret;
}
-
if (all_constant) {
- *constant = 1;
- return retOk;
+ *constant = 1;
+ return retOk;
}
DMC_PUSH(*text, matchMkTuple);
DMC_PUSH(*text, nelems);
@@ -3586,6 +3719,36 @@ static DMCRet dmc_tuple(DMCContext *context,
return retOk;
}
+static DMCRet
+dmc_map(DMCContext *context, DMCHeap *heap, DMC_STACK_TYPE(UWord) *text,
+ Eterm t, int *constant)
+{
+ map_t *m = (map_t *)map_val(t);
+ Eterm *values = map_get_values(m);
+ int nelems = map_get_size(m);
+ int constant_values;
+ DMCRet ret;
+
+ ret = dmc_array(context, heap, text, values, nelems, &constant_values);
+ if (ret != retOk) {
+ return ret;
+ }
+ if (constant_values) {
+ *constant = 1;
+ return retOk;
+ }
+ DMC_PUSH(*text, matchPushC);
+ DMC_PUSH(*text, dmc_private_copy(context, m->keys));
+ if (++context->stack_used > context->stack_need) {
+ context->stack_need = context->stack_used;
+ }
+ DMC_PUSH(*text, matchMkMap);
+ DMC_PUSH(*text, nelems);
+ context->stack_used -= nelems;
+ *constant = 0;
+ return retOk;
+}
+
static DMCRet dmc_whole_expression(DMCContext *context,
DMCHeap *heap,
DMC_STACK_TYPE(UWord) *text,
@@ -4580,7 +4743,10 @@ static DMCRet dmc_expr(DMCContext *context,
return ret;
break;
case TAG_PRIMARY_BOXED:
- if (!BOXED_IS_TUPLE(t)) {
+ if (is_map(t)) {
+ return dmc_map(context, heap, text, t, constant);
+ }
+ if (!is_tuple(t)) {
goto simple_term;
}
p = tuple_val(t);
@@ -4855,7 +5021,7 @@ static Eterm my_copy_struct(Eterm t, Eterm **hp, ErlOffHeap* off_heap)
*hp += 2;
break;
case TAG_PRIMARY_BOXED:
- if (BOXED_IS_TUPLE(t)) {
+ if (is_tuple(t)) {
if (arityval(*tuple_val(t)) == 1 &&
is_tuple(a = tuple_val(t)[1])) {
Uint i,n;
@@ -5126,6 +5292,12 @@ void db_match_dis(Binary *bp)
++t;
erts_printf("Tuple\t%beu\n", n);
break;
+ case matchMap:
+ ++t;
+ n = *t;
+ ++t;
+ erts_printf("Map\t%beu\n", n);
+ break;
case matchPushT:
++t;
n = *t;
@@ -5136,6 +5308,18 @@ void db_match_dis(Binary *bp)
++t;
erts_printf("PushL\n");
break;
+ case matchPushM:
+ ++t;
+ n = *t;
+ ++t;
+ erts_printf("PushM\t%beu\n", n);
+ break;
+ case matchPushK:
+ ++t;
+ p = (Eterm) *t;
+ ++t;
+ erts_printf("PushK\t%p (%T)\n", t, p);
+ break;
case matchPop:
++t;
erts_printf("Pop\n");
@@ -5252,6 +5436,12 @@ void db_match_dis(Binary *bp)
++t;
erts_printf("MkTuple\t%beu\n", n);
break;
+ case matchMkMap:
+ ++t;
+ n = *t;
+ ++t;
+ erts_printf("MkMapA\t%beu\n", n);
+ break;
case matchOr:
++t;
n = *t;
diff --git a/erts/emulator/beam/erl_map.c b/erts/emulator/beam/erl_map.c
index 5e740aacdd..b2a16eb5ed 100644
--- a/erts/emulator/beam/erl_map.c
+++ b/erts/emulator/beam/erl_map.c
@@ -113,36 +113,55 @@ BIF_RETTYPE maps_to_list_1(BIF_ALIST_1) {
* return value if key *matches* a key in the map
*/
-int erts_maps_find(Eterm key, Eterm map, Eterm *value) {
-
- Eterm *ks,*vs;
+const Eterm *
+#if HALFWORD_HEAP
+erts_maps_get_rel(Eterm key, Eterm map, Eterm *map_base)
+#else
+erts_maps_get(Eterm key, Eterm map)
+#endif
+{
+ Eterm *ks, *vs;
map_t *mp;
- Uint n,i;
+ Uint n, i;
- mp = (map_t*)map_val(map);
+ mp = (map_t *)map_val_rel(map, map_base);
n = map_get_size(mp);
- ks = map_get_keys(mp);
+
+ if (n == 0) {
+ return NULL;
+ }
+
+ ks = (Eterm *)tuple_val_rel(mp->keys, map_base) + 1;
vs = map_get_values(mp);
- for( i = 0; i < n; i++) {
- if (EQ(ks[i], key)) {
- *value = vs[i];
- return 1;
- }
+ if (is_immed(key)) {
+ for (i = 0; i < n; i++) {
+ if (ks[i] == key) {
+ return &vs[i];
+ }
+ }
+ }
+
+ for (i = 0; i < n; i++) {
+ if (eq_rel(ks[i], NULL, key, map_base)) {
+ return &vs[i];
+ }
}
- return 0;
+ return NULL;
}
BIF_RETTYPE maps_find_2(BIF_ALIST_2) {
if (is_map(BIF_ARG_2)) {
- Eterm *hp, value,res;
+ Eterm *hp, res;
+ const Eterm *value;
- if (erts_maps_find(BIF_ARG_1, BIF_ARG_2, &value)) {
+ value = erts_maps_get(BIF_ARG_1, BIF_ARG_2);
+ if (value) {
hp = HAlloc(BIF_P, 3);
res = make_tuple(hp);
*hp++ = make_arityval(2);
*hp++ = am_ok;
- *hp++ = value;
+ *hp++ = *value;
BIF_RET(res);
}
@@ -150,52 +169,22 @@ BIF_RETTYPE maps_find_2(BIF_ALIST_2) {
}
BIF_ERROR(BIF_P, BADARG);
}
+
/* maps:get/2
* return value if key *matches* a key in the map
* exception bad_key if none matches
*/
-
-int erts_maps_get(Eterm key, Eterm map, Eterm *value) {
- Eterm *ks,*vs;
- map_t *mp;
- Uint n,i;
-
- mp = (map_t*)map_val(map);
- n = map_get_size(mp);
-
- if (n == 0)
- return 0;
-
- ks = map_get_keys(mp);
- vs = map_get_values(mp);
-
- if (is_immed(key)) {
- for( i = 0; i < n; i++) {
- if (ks[i] == key) {
- *value = vs[i];
- return 1;
- }
- }
- }
-
- for( i = 0; i < n; i++) {
- if (EQ(ks[i], key)) {
- *value = vs[i];
- return 1;
- }
- }
- return 0;
-}
-
BIF_RETTYPE maps_get_2(BIF_ALIST_2) {
if (is_map(BIF_ARG_2)) {
Eterm *hp;
- Eterm value, error;
+ Eterm error;
+ const Eterm *value;
char *s_error;
- if (erts_maps_get(BIF_ARG_1, BIF_ARG_2, &value)) {
- BIF_RET(value);
+ value = erts_maps_get(BIF_ARG_1, BIF_ARG_2);
+ if (value) {
+ BIF_RET(*value);
}
s_error = "bad_key";
diff --git a/erts/emulator/beam/erl_map.h b/erts/emulator/beam/erl_map.h
index cfacb2ec28..2e02ca4677 100644
--- a/erts/emulator/beam/erl_map.h
+++ b/erts/emulator/beam/erl_map.h
@@ -64,9 +64,17 @@ typedef struct map_s {
Eterm erts_maps_put(Process *p, Eterm key, Eterm value, Eterm map);
int erts_maps_update(Process *p, Eterm key, Eterm value, Eterm map, Eterm *res);
-int erts_maps_find(Eterm key, Eterm map, Eterm *value);
-int erts_maps_get(Eterm key, Eterm map, Eterm *value);
int erts_maps_remove(Process *p, Eterm key, Eterm map, Eterm *res);
int erts_validate_and_sort_map(map_t* map);
+
+#if HALFWORD_HEAP
+const Eterm *
+erts_maps_get_rel(Eterm key, Eterm map, Eterm *map_base);
+# define erts_maps_get(A, B) erts_maps_get_rel(A, B, NULL)
+#else
+const Eterm *
+erts_maps_get(Eterm key, Eterm map);
+# define erts_maps_get_rel(A, B, B_BASE) erts_maps_get(A, B)
#endif
+#endif
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index 3708133f40..caa9eba8a7 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -1954,10 +1954,16 @@ int enif_get_map_value(ErlNifEnv* env,
Eterm key,
Eterm *value)
{
+ const Eterm *ret;
if (is_not_map(map)) {
return 0;
}
- return erts_maps_get(key, map, value);
+ ret = erts_maps_get(key, map);
+ if (ret) {
+ *value = *ret;
+ return 1;
+ }
+ return 0;
}
int enif_make_map_update(ErlNifEnv* env,
diff --git a/erts/emulator/test/match_spec_SUITE.erl b/erts/emulator/test/match_spec_SUITE.erl
index fdce157abc..fc4a5028e1 100644
--- a/erts/emulator/test/match_spec_SUITE.erl
+++ b/erts/emulator/test/match_spec_SUITE.erl
@@ -30,6 +30,7 @@
-export([fpe/1]).
-export([otp_9422/1]).
-export([faulty_seq_trace/1, do_faulty_seq_trace/0]).
+-export([maps/1]).
-export([runner/2, loop_runner/3]).
-export([f1/1, f2/2, f3/2, fn/1, fn/2, fn/3]).
-export([do_boxed_and_small/0]).
@@ -62,7 +63,8 @@ all() ->
moving_labels,
faulty_seq_trace,
empty_list,
- otp_9422];
+ otp_9422,
+ maps];
true -> [not_run]
end.
@@ -899,6 +901,31 @@ fpe(Config) when is_list(Config) ->
_ -> ok
end.
+maps(Config) when is_list(Config) ->
+ {ok,#{},[],[]} = erlang:match_spec_test(#{}, [{'_',[],['$_']}], table),
+ {ok,#{},[],[]} = erlang:match_spec_test(#{}, [{#{},[],['$_']}], table),
+ {ok,false,[],[]} =
+ erlang:match_spec_test(#{}, [{not_a_map,[],['$_']}], table),
+ {ok,bar,[],[]} =
+ erlang:match_spec_test(#{foo => bar},
+ [{#{foo => '$1'},[],['$1']}],
+ table),
+ {ok,false,[],[]} =
+ erlang:match_spec_test(#{foo => bar},
+ [{#{foo => qux},[],[qux]}],
+ table),
+ {ok,false,[],[]} =
+ erlang:match_spec_test(#{}, [{#{foo => '_'},[],[foo]}], table),
+ {error,_} =
+ erlang:match_spec_test(#{}, [{#{'$1' => '_'},[],[foo]}], table),
+ {ok,bar,[],[]} =
+ erlang:match_spec_test({#{foo => bar}},
+ [{{#{foo => '$1'}},[],['$1']}],
+ table),
+ {ok,#{foo := 3},[],[]} =
+ erlang:match_spec_test({}, [{{},[],[#{foo => {'+',1,2}}]}], table),
+ ok.
+
empty_list(Config) when is_list(Config) ->
Val=[{'$1',[], [{message,'$1'},{message,{caller}},{return_trace}]}],
%% Did crash debug VM in faulty assert: