Fix warnings

concordium-std/src/state_btree.rs

@@ -46,15 +46,14 @@ use crate::{
 /// [`new_btree_map`](crate::StateBuilder::new_btree_map) method on the
 /// [`StateBuilder`](crate::StateBuilder).
 ///
-/// ```
+/// ```no_run
 /// # use concordium_std::*;
-/// # use concordium_std::test_infrastructure::*;
-/// # let mut state_builder = TestStateBuilder::new();
+/// # let mut state_builder = StateBuilder::open(StateApi::open());
 /// /// In an init method:
 /// let mut map1 = state_builder.new_btree_map();
 /// # map1.insert(0u8, 1u8); // Specifies type of map.
 ///
-/// # let mut host = TestHost::new((), state_builder);
+/// # let mut host = ExternHost { state: (), state_builder };
 /// /// In a receive method:
 /// let mut map2 = host.state_builder().new_btree_map();
 /// # map2.insert(0u16, 1u16);
@@ -330,15 +329,13 @@ impl<const M: usize, K, V> StateBTreeMap<K, V, M> {
 /// [`new_btree_set`](crate::StateBuilder::new_btree_set) method on the
 /// [`StateBuilder`](crate::StateBuilder).
 ///
-/// ```
+/// ```no_run
 /// # use concordium_std::*;
-/// # use concordium_std::test_infrastructure::*;
-/// # let mut state_builder = TestStateBuilder::new();
+/// # let mut state_builder = StateBuilder::open(StateApi::open());
 /// /// In an init method:
 /// let mut map1 = state_builder.new_btree_set();
 /// # map1.insert(0u8); // Specifies type of map.
-///
-/// # let mut host = TestHost::new((), state_builder);
+/// # let mut host = ExternHost { state: (), state_builder };
 /// /// In a receive method:
 /// let mut map2 = host.state_builder().new_btree_set();
 /// # map2.insert(0u16);
@@ -351,8 +348,8 @@ impl<const M: usize, K, V> StateBTreeMap<K, V, M> {
 ///
 /// ```no_run
 /// # use concordium_std::*;
-/// struct MyState<S: HasStateApi = StateApi> {
-///     inner: StateBTreeSet<u64, S>,
+/// struct MyState {
+///     inner: StateBTreeSet<u64>,
 /// }
 /// fn incorrect_replace(state_builder: &mut StateBuilder, state: &mut MyState) {
 ///     // The following is incorrect. The old value of `inner` is not properly deleted.
@@ -364,8 +361,8 @@ impl<const M: usize, K, V> StateBTreeMap<K, V, M> {
 ///
 /// ```no_run
 /// # use concordium_std::*;
-/// # struct MyState<S: HasStateApi = StateApi> {
-/// #    inner: StateBTreeSet<u64, S>
+/// # struct MyState {
+/// #    inner: StateBTreeSet<u64>
 /// # }
 /// fn correct_replace(state_builder: &mut StateBuilder, state: &mut MyState) {
 ///     state.inner.clear();

concordium-std/tests/state/map-multiple-entries.stderr

@@ -2,9 +2,9 @@ error[E0499]: cannot borrow `map` as mutable more than once at a time
   --> tests/state/map-multiple-entries.rs:12:14
    |
 11 |     let e1 = map.entry(0u8);
-   |              -------------- first mutable borrow occurs here
+   |              --- first mutable borrow occurs here
 12 |     let e2 = map.entry(1u8);
-   |              ^^^^^^^^^^^^^^ second mutable borrow occurs here
+   |              ^^^ second mutable borrow occurs here
 13 |     // Use them, so we are certain that their lifetimes overlap.
 14 |     e1.or_insert(1);
    |     -- first borrow later used here

concordium-std/tests/state/map-multiple-state-ref-mut.stderr

@@ -2,9 +2,9 @@ error[E0499]: cannot borrow `map` as mutable more than once at a time
   --> tests/state/map-multiple-state-ref-mut.rs:14:14
    |
 13 |     let e1 = map.get_mut(&0u8).unwrap();
-   |              ----------------- first mutable borrow occurs here
+   |              --- first mutable borrow occurs here
 14 |     let e2 = map.get_mut(&1u8).unwrap();
-   |              ^^^^^^^^^^^^^^^^^ second mutable borrow occurs here
+   |              ^^^ second mutable borrow occurs here
 15 |     // Use them, so we are certain that their lifetimes overlap.
 16 |     assert_eq!(*e1, *e2);
    |                 -- first borrow later used here

examples/cis2-dynamic-nft/src/lib.rs

@@ -196,7 +196,7 @@ impl<S: HasStateApi> State<S> {
         owner: &Address,
         state_builder: &mut StateBuilder<S>,
     ) {
-        self.tokens.insert(*token_id, TokenMetadataState {
+        let _ = self.tokens.insert(*token_id, TokenMetadataState {
             token_metadata_current_state_counter: 0,
             token_metadata_list:                  mint_param.metadata_url.clone(),
         });
@@ -368,7 +368,7 @@ impl<S: HasStateApi> State<S> {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 }
 

examples/cis2-multi-royalties/src/lib.rs

@@ -229,7 +229,7 @@ impl State {
         royalty: u8,
     ) {
         self.tokens.insert(*token_id);
-        self.token_details.insert(*token_id, TokenDetails {
+        let _ = self.token_details.insert(*token_id, TokenDetails {
             minter: *owner,
             royalty,
         });
@@ -355,7 +355,7 @@ impl State {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 
     fn calculate_royalty_payments(

examples/cis2-multi/src/lib.rs

@@ -642,7 +642,7 @@ impl State {
     ) -> MetadataUrl {
         let token_metadata = self.tokens.get(token_id).map(|x| x.to_owned());
         if token_metadata.is_none() {
-            self.tokens.insert(*token_id, metadata_url.to_owned());
+            let _ = self.tokens.insert(*token_id, metadata_url.to_owned());
         }
 
         let mut owner_state =
@@ -788,7 +788,7 @@ impl State {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 
     /// Grant role to an address.

examples/cis2-nft/src/lib.rs

@@ -275,7 +275,7 @@ impl State {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 }
 

examples/cis2-wccd/src/lib.rs

@@ -412,7 +412,7 @@ impl State {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 }
 

examples/cis3-nft-sponsored-txs/src/lib.rs

@@ -501,7 +501,7 @@ impl State {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 }
 

examples/credential-registry/src/lib.rs

@@ -314,7 +314,7 @@ impl<S: HasStateApi> State<S> {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 }
 

examples/eSealing/src/lib.rs

@@ -84,7 +84,7 @@ impl State {
 
     /// Add a new file hash (replaces existing file if present).
     fn add_file(&mut self, file_hash: HashSha2256, timestamp: Timestamp, witness: AccountAddress) {
-        self.files.insert(file_hash, FileState {
+        let _ = self.files.insert(file_hash, FileState {
             timestamp,
             witness,
         });

examples/factory/src/lib.rs

@@ -269,7 +269,7 @@ pub mod factory {
         let state = host.state_mut();
         let next_product = state.next_product;
         state.next_product = next_product + 1;
-        state.products.insert(next_product, product_address);
+        let _ = state.products.insert(next_product, product_address);
         // Invoke the initialize entrypoint on the product passing in the index for this
         // product.
         host.invoke_contract(

templates/cis2-nft/src/lib.rs

@@ -275,7 +275,7 @@ impl State {
         std_id: StandardIdentifierOwned,
         implementors: Vec<ContractAddress>,
     ) {
-        self.implementors.insert(std_id, implementors);
+        let _ = self.implementors.insert(std_id, implementors);
     }
 }