refactor: polish the usage of z_result_t in for loop

examples/z_get.c

@@ -71,7 +71,7 @@ int main(int argc, char **argv) {
           z_move(opts));  // here, the send is moved and will be dropped by zenoh when adequate
     z_owned_reply_t reply;
 
-    for (z_result_t res = z_recv(z_loan(handler), &reply); res == Z_OK; res = z_recv(z_loan(handler), &reply)) {
+    while (z_recv(z_loan(handler), &reply) == Z_OK) {
         if (z_reply_is_ok(z_loan(reply))) {
             const z_loaned_sample_t *sample = z_reply_ok(z_loan(reply));
 
@@ -93,4 +93,4 @@ int main(int argc, char **argv) {
     z_drop(z_move(handler));
     z_close(z_move(s));
     return 0;
-}
+}

examples/z_get_liveliness.c

@@ -53,7 +53,7 @@ int main(int argc, char **argv) {
     z_fifo_channel_reply_new(&closure, &handler, 16);
     zc_liveliness_get(z_loan(s), z_loan(keyexpr), z_move(closure), NULL);
     z_owned_reply_t reply;
-    for (z_result_t res = z_recv(z_loan(handler), &reply); res == Z_OK; res = z_recv(z_loan(handler), &reply)) {
+    while (z_recv(z_loan(handler), &reply) == Z_OK) {
         if (z_reply_is_ok(z_loan(reply))) {
             const z_loaned_sample_t *sample = z_reply_ok(z_loan(reply));
             z_view_string_t key_str;

examples/z_get_shm.c

@@ -109,7 +109,7 @@ int main(int argc, char** argv) {
           z_move(opts));  // here, the send is moved and will be dropped by zenoh when adequate
     z_owned_reply_t reply;
 
-    for (z_result_t res = z_recv(z_loan(handler), &reply); res == Z_OK; res = z_recv(z_loan(handler), &reply)) {
+    while (z_recv(z_loan(handler), &reply) == Z_OK) {
         if (z_reply_is_ok(z_loan(reply))) {
             const z_loaned_sample_t* sample = z_reply_ok(z_loan(reply));
 
@@ -135,4 +135,4 @@ int main(int argc, char** argv) {
     z_drop(z_move(provider));
     z_drop(z_move(layout));
     return 0;
-}
+}

examples/z_non_blocking_get.c

@@ -55,8 +55,9 @@ int main(int argc, char **argv) {
     z_get(z_loan(s), z_loan(keyexpr), "", z_move(closure),
           z_move(opts));  // here, the closure is moved and will be dropped by zenoh when adequate
     z_owned_reply_t reply;
-    for (z_result_t res = z_try_recv(z_loan(handler), &reply); res != Z_CHANNEL_DISCONNECTED;
-         res = z_try_recv(z_loan(handler), &reply)) {
+
+    z_result_t res;
+    while ((res = z_try_recv(z_loan(handler), &reply)) != Z_CHANNEL_DISCONNECTED) {
         if (res != Z_OK) {
             z_sleep_ms(50);
             continue;
@@ -78,4 +79,4 @@ int main(int argc, char **argv) {
     z_drop(z_move(handler));
     z_close(z_move(s));
     return 0;
-}
+}

examples/z_queryable_with_channels.c

@@ -62,7 +62,7 @@ int main(int argc, char **argv) {
 
     printf("^C to quit...\n");
     z_owned_query_t oquery;
-    for (z_result_t res = z_recv(z_loan(handler), &oquery); res == Z_OK; res = z_recv(z_loan(handler), &oquery)) {
+    while (z_recv(z_loan(handler), &oquery) == Z_OK) {
         const z_loaned_query_t *query = z_loan(oquery);
         z_view_string_t key_string;
         z_keyexpr_as_view_string(z_query_keyexpr(query), &key_string);

tests/z_int_queryable_attachment_test.c

@@ -190,7 +190,7 @@ int run_get() {
         opts.attachment = &attachment;
         z_get(z_loan(s), z_loan(ke), "", z_move(closure), &opts);
         z_owned_reply_t reply;
-        for (z_result_t res = z_recv(z_loan(handler), &reply); res == Z_OK; res = z_recv(z_loan(handler), &reply)) {
+        while (z_recv(z_loan(handler), &reply) == Z_OK) {
             assert(z_reply_is_ok(z_loan(reply)));
 
             const z_loaned_sample_t *sample = z_reply_ok(z_loan(reply));

tests/z_int_queryable_test.c

@@ -109,7 +109,7 @@ int run_get() {
         z_get_options_default(&opts);
         z_get(z_loan(s), z_loan(ke), "", z_move(closure), &opts);
         z_owned_reply_t reply;
-        for (z_result_t res = z_recv(z_loan(handler), &reply); res == Z_OK; res = z_recv(z_loan(handler), &reply)) {
+        while (z_recv(z_loan(handler), &reply) == Z_OK) {
             assert(z_reply_is_ok(z_loan(reply)));
 
             const z_loaned_sample_t *sample = z_reply_ok(z_loan(reply));