pub struct DontWoof<'tx> { /* private fields */ }
Expand description
This has a bunch of logic for changing data, use DontWoof::new
to make an instance.
DontWoof::from(rusqlite::Transaction)
is bad, don’t use it.
Implementations
sourceimpl<'tx> DontWoof<'tx>
impl<'tx> DontWoof<'tx>
pub fn explain_plan<'n, V>(&self, query: &Query<V>) -> Result<PlanExplanation> where
for<'p> &'p [V]: Params,
sourceimpl<'tx> DontWoof<'tx>
impl<'tx> DontWoof<'tx>
sourcepub fn new(db: &'tx mut Connection) -> Result<Self>
pub fn new(db: &'tx mut Connection) -> Result<Self>
DontWoof::from(rusqlite::Transaction)
is bad, don’t use it.
sourcepub fn attribute<A: AsRef<AttributeRef>>(
&self,
a: Encoded<A>
) -> Result<Encoded<Entity>>
pub fn attribute<A: AsRef<AttributeRef>>(
&self,
a: Encoded<A>
) -> Result<Encoded<Entity>>
Look up an attribute by its identifier.
In other words, find ?e given ?a where ?e :db/attribute ?a.
pub fn new_entity(&self) -> Result<Encoded<Entity>>
pub fn decode<T: FromTypeTagAndSqlValue>(&self, e: Encoded<T>) -> Result<T>
pub fn fluent_entity(&self) -> Result<FluentEntity<'_, '_>>
pub fn fluent(&self, e: Encoded<Entity>) -> FluentEntity<'_, '_>
pub fn encode<V: TypeTag + ToSql>(
&self,
val: V
) -> Result<Encoded<<V as TypeTag>::Factory>>
sourcepub fn assert<V: TypeTag>(
&self,
e: Encoded<Entity>,
a: Encoded<Entity>,
v: Encoded<V>
) -> Result<&Self>
pub fn assert<V: TypeTag>(
&self,
e: Encoded<Entity>,
a: Encoded<Entity>,
v: Encoded<V>
) -> Result<&Self>
Insert a single triplet.
sourcepub fn retract<V: TypeTag>(
&self,
e: Encoded<Entity>,
a: Encoded<Entity>,
v: Encoded<V>
) -> Result<&Self>
pub fn retract<V: TypeTag>(
&self,
e: Encoded<Entity>,
a: Encoded<Entity>,
v: Encoded<V>
) -> Result<&Self>
Delete a single triplet.
sourcepub fn optimize(&self) -> Result<()>
pub fn optimize(&self) -> Result<()>
Run PRAGMA optimize;
. May update indexes and promote better queries.
The SQLite documentation recommends calling this before closing a connection. (TODO where?)
pub fn prefetch_attributes<V>(&self, network: &mut Network<'_, V>) -> Result<()> where
V: TypeTag + ToSql,
pub fn into_tx(self) -> Transaction<'tx>
Methods from Deref<Target = Transaction<'tx>>
sourcepub fn drop_behavior(&self) -> DropBehavior
pub fn drop_behavior(&self) -> DropBehavior
Get the current setting for what happens to the transaction when it is dropped.
Methods from Deref<Target = Connection>
sourcepub fn busy_timeout(&self, timeout: Duration) -> Result<(), Error>
pub fn busy_timeout(&self, timeout: Duration) -> Result<(), Error>
Set a busy handler that sleeps for a specified amount of time when a table is locked. The handler will sleep multiple times until at least “ms” milliseconds of sleeping have accumulated.
Calling this routine with an argument equal to zero turns off all busy handlers.
There can only be a single busy handler for a particular database
connection at any given moment. If another busy handler was defined
(using busy_handler
) prior to calling this
routine, that other busy handler is cleared.
Newly created connections currently have a default busy timeout of 5000ms, but this may be subject to change.
sourcepub fn busy_handler(
&self,
callback: Option<fn(i32) -> bool>
) -> Result<(), Error>
pub fn busy_handler(
&self,
callback: Option<fn(i32) -> bool>
) -> Result<(), Error>
Register a callback to handle SQLITE_BUSY
errors.
If the busy callback is None
, then SQLITE_BUSY
is returned
immediately upon encountering the lock. The argument to the busy
handler callback is the number of times that the
busy handler has been invoked previously for the
same locking event. If the busy callback returns false
, then no
additional attempts are made to access the
database and SQLITE_BUSY
is returned to the
application. If the callback returns true
, then another attempt
is made to access the database and the cycle repeats.
There can only be a single busy handler defined for each database
connection. Setting a new busy handler clears any previously set
handler. Note that calling busy_timeout()
or evaluating PRAGMA busy_timeout=N
will change the busy handler
and thus clear any previously set busy handler.
Newly created connections default to a
busy_timeout()
handler with a timeout
of 5000ms, although this is subject to change.
sourcepub fn prepare_cached(&self, sql: &str) -> Result<CachedStatement<'_>, Error>
pub fn prepare_cached(&self, sql: &str) -> Result<CachedStatement<'_>, Error>
Prepare a SQL statement for execution, returning a previously prepared
(but not currently in-use) statement if one is available. The
returned statement will be cached for reuse by future calls to
prepare_cached
once it is dropped.
fn insert_new_people(conn: &Connection) -> Result<()> {
{
let mut stmt = conn.prepare_cached("INSERT INTO People (name) VALUES (?)")?;
stmt.execute(["Joe Smith"])?;
}
{
// This will return the same underlying SQLite statement handle without
// having to prepare it again.
let mut stmt = conn.prepare_cached("INSERT INTO People (name) VALUES (?)")?;
stmt.execute(["Bob Jones"])?;
}
Ok(())
}
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn set_prepared_statement_cache_capacity(&self, capacity: usize)
pub fn set_prepared_statement_cache_capacity(&self, capacity: usize)
Set the maximum number of cached prepared statements this connection will hold. By default, a connection will hold a relatively small number of cached statements. If you need more, or know that you will not use cached statements, you can set the capacity manually using this method.
sourcepub fn flush_prepared_statement_cache(&self)
pub fn flush_prepared_statement_cache(&self)
Remove/finalize all prepared statements currently in the cache.
sourcepub fn db_config(&self, config: DbConfig) -> Result<bool, Error>
pub fn db_config(&self, config: DbConfig) -> Result<bool, Error>
Returns the current value of a config
.
- SQLITE_DBCONFIG_ENABLE_FKEY: return
false
ortrue
to indicate whether FK enforcement is off or on - SQLITE_DBCONFIG_ENABLE_TRIGGER: return
false
ortrue
to indicate whether triggers are disabled or enabled - SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER: return
false
ortrue
to indicate whether fts3_tokenizer are disabled or enabled - SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE: return
false
to indicate checkpoints-on-close are not disabled ortrue
if they are - SQLITE_DBCONFIG_ENABLE_QPSG: return
false
ortrue
to indicate whether the QPSG is disabled or enabled - SQLITE_DBCONFIG_TRIGGER_EQP: return
false
to indicate output-for-trigger are not disabled ortrue
if it is
sourcepub fn set_db_config(
&self,
config: DbConfig,
new_val: bool
) -> Result<bool, Error>
pub fn set_db_config(
&self,
config: DbConfig,
new_val: bool
) -> Result<bool, Error>
Make configuration changes to a database connection
- SQLITE_DBCONFIG_ENABLE_FKEY:
false
to disable FK enforcement,true
to enable FK enforcement - SQLITE_DBCONFIG_ENABLE_TRIGGER:
false
to disable triggers,true
to enable triggers - SQLITE_DBCONFIG_ENABLE_FTS3_TOKENIZER:
false
to disable fts3_tokenizer(),true
to enable fts3_tokenizer() - SQLITE_DBCONFIG_NO_CKPT_ON_CLOSE:
false
(the default) to enable checkpoints-on-close,true
to disable them - SQLITE_DBCONFIG_ENABLE_QPSG:
false
to disable the QPSG,true
to enable QPSG - SQLITE_DBCONFIG_TRIGGER_EQP:
false
to disable output for trigger programs,true
to enable it
sourcepub fn create_scalar_function<F, T>(
&self,
fn_name: &str,
n_arg: i32,
flags: FunctionFlags,
x_func: F
) -> Result<(), Error> where
F: 'static + FnMut(&Context<'_>) -> Result<T, Error> + Send + UnwindSafe,
T: ToSql,
pub fn create_scalar_function<F, T>(
&self,
fn_name: &str,
n_arg: i32,
flags: FunctionFlags,
x_func: F
) -> Result<(), Error> where
F: 'static + FnMut(&Context<'_>) -> Result<T, Error> + Send + UnwindSafe,
T: ToSql,
Attach a user-defined scalar function to this database connection.
fn_name
is the name the function will be accessible from SQL.
n_arg
is the number of arguments to the function. Use -1
for a
variable number. If the function always returns the same value
given the same input, deterministic
should be true
.
The function will remain available until the connection is closed or
until it is explicitly removed via
remove_function
.
Example
fn scalar_function_example(db: Connection) -> Result<()> {
db.create_scalar_function(
"halve",
1,
FunctionFlags::SQLITE_UTF8 | FunctionFlags::SQLITE_DETERMINISTIC,
|ctx| {
let value = ctx.get::<f64>(0)?;
Ok(value / 2f64)
},
)?;
let six_halved: f64 = db.query_row("SELECT halve(6)", [], |r| r.get(0))?;
assert_eq!(six_halved, 3f64);
Ok(())
}
Failure
Will return Err if the function could not be attached to the connection.
sourcepub fn create_aggregate_function<A, D, T>(
&self,
fn_name: &str,
n_arg: i32,
flags: FunctionFlags,
aggr: D
) -> Result<(), Error> where
A: RefUnwindSafe + UnwindSafe,
D: 'static + Aggregate<A, T>,
T: ToSql,
pub fn create_aggregate_function<A, D, T>(
&self,
fn_name: &str,
n_arg: i32,
flags: FunctionFlags,
aggr: D
) -> Result<(), Error> where
A: RefUnwindSafe + UnwindSafe,
D: 'static + Aggregate<A, T>,
T: ToSql,
Attach a user-defined aggregate function to this database connection.
Failure
Will return Err if the function could not be attached to the connection.
sourcepub fn remove_function(&self, fn_name: &str, n_arg: i32) -> Result<(), Error>
pub fn remove_function(&self, fn_name: &str, n_arg: i32) -> Result<(), Error>
Removes a user-defined function from this database connection.
fn_name
and n_arg
should match the name and number of arguments
given to create_scalar_function
or create_aggregate_function
.
Failure
Will return Err if the function could not be removed.
sourcepub fn commit_hook<F>(&self, hook: Option<F>) where
F: 'static + FnMut() -> bool + Send,
pub fn commit_hook<F>(&self, hook: Option<F>) where
F: 'static + FnMut() -> bool + Send,
Register a callback function to be invoked whenever a transaction is committed.
The callback returns true
to rollback.
sourcepub fn rollback_hook<F>(&self, hook: Option<F>) where
F: 'static + FnMut() + Send,
pub fn rollback_hook<F>(&self, hook: Option<F>) where
F: 'static + FnMut() + Send,
Register a callback function to be invoked whenever a transaction is committed.
The callback returns true
to rollback.
sourcepub fn update_hook<F>(&self, hook: Option<F>) where
F: 'static + FnMut(Action, &str, &str, i64) + Send,
pub fn update_hook<F>(&self, hook: Option<F>) where
F: 'static + FnMut(Action, &str, &str, i64) + Send,
Register a callback function to be invoked whenever a row is updated, inserted or deleted in a rowid table.
The callback parameters are:
- the type of database update (SQLITE_INSERT, SQLITE_UPDATE or SQLITE_DELETE),
- the name of the database (“main”, “temp”, …),
- the name of the table that is updated,
- the ROWID of the row that is updated.
sourcepub fn progress_handler<F>(&self, num_ops: i32, handler: Option<F>) where
F: 'static + FnMut() -> bool + Send + RefUnwindSafe,
pub fn progress_handler<F>(&self, num_ops: i32, handler: Option<F>) where
F: 'static + FnMut() -> bool + Send + RefUnwindSafe,
Register a query progress callback.
The parameter num_ops
is the approximate number of virtual machine
instructions that are evaluated between successive invocations of the
handler
. If num_ops
is less than one then the progress handler
is disabled.
If the progress callback returns true
, the operation is interrupted.
Register an authorizer callback that’s invoked as a statement is being prepared.
sourcepub fn pragma_query_value<T, F>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
f: F
) -> Result<T, Error> where
F: FnOnce(&Row<'_>) -> Result<T, Error>,
pub fn pragma_query_value<T, F>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
f: F
) -> Result<T, Error> where
F: FnOnce(&Row<'_>) -> Result<T, Error>,
Query the current value of pragma_name
.
Some pragmas will return multiple rows/values which cannot be retrieved with this method.
Prefer PRAGMA function introduced in SQLite 3.20:
SELECT user_version FROM pragma_user_version;
sourcepub fn pragma_query<F>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
f: F
) -> Result<(), Error> where
F: FnMut(&Row<'_>) -> Result<(), Error>,
pub fn pragma_query<F>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
f: F
) -> Result<(), Error> where
F: FnMut(&Row<'_>) -> Result<(), Error>,
Query the current rows/values of pragma_name
.
Prefer PRAGMA function introduced in SQLite 3.20:
SELECT * FROM pragma_collation_list;
sourcepub fn pragma<F, V>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
pragma_value: V,
f: F
) -> Result<(), Error> where
F: FnMut(&Row<'_>) -> Result<(), Error>,
V: ToSql,
pub fn pragma<F, V>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
pragma_value: V,
f: F
) -> Result<(), Error> where
F: FnMut(&Row<'_>) -> Result<(), Error>,
V: ToSql,
Query the current value(s) of pragma_name
associated to
pragma_value
.
This method can be used with query-only pragmas which need an argument
(e.g. table_info('one_tbl')
) or pragmas which returns value(s)
(e.g. integrity_check
).
Prefer PRAGMA function introduced in SQLite 3.20:
SELECT * FROM pragma_table_info(?);
sourcepub fn pragma_update<V>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
pragma_value: V
) -> Result<(), Error> where
V: ToSql,
pub fn pragma_update<V>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
pragma_value: V
) -> Result<(), Error> where
V: ToSql,
Set a new value to pragma_name
.
Some pragmas will return the updated value which cannot be retrieved with this method.
sourcepub fn pragma_update_and_check<F, T, V>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
pragma_value: V,
f: F
) -> Result<T, Error> where
F: FnOnce(&Row<'_>) -> Result<T, Error>,
V: ToSql,
pub fn pragma_update_and_check<F, T, V>(
&self,
schema_name: Option<DatabaseName<'_>>,
pragma_name: &str,
pragma_value: V,
f: F
) -> Result<T, Error> where
F: FnOnce(&Row<'_>) -> Result<T, Error>,
V: ToSql,
Set a new value to pragma_name
and return the updated value.
Only few pragmas automatically return the updated value.
sourcepub fn unchecked_transaction(&self) -> Result<Transaction<'_>, Error>
pub fn unchecked_transaction(&self) -> Result<Transaction<'_>, Error>
Begin a new transaction with the default behavior (DEFERRED).
Attempt to open a nested transaction will result in a SQLite error.
Connection::transaction
prevents this at compile time by taking &mut self
, but Connection::unchecked_transaction()
may be used to defer
the checking until runtime.
See Connection::transaction
and Transaction::new_unchecked
(which can be used if the default transaction behavior is undesirable).
Example
fn perform_queries(conn: Rc<Connection>) -> Result<()> {
let tx = conn.unchecked_transaction()?;
do_queries_part_1(&tx)?; // tx causes rollback if this fails
do_queries_part_2(&tx)?; // tx causes rollback if this fails
tx.commit()
}
Failure
Will return Err
if the underlying SQLite call fails. The specific
error returned if transactions are nested is currently unspecified.
sourcepub fn execute_batch(&self, sql: &str) -> Result<(), Error>
pub fn execute_batch(&self, sql: &str) -> Result<(), Error>
Convenience method to run multiple SQL statements (that cannot take any parameters).
Example
fn create_tables(conn: &Connection) -> Result<()> {
conn.execute_batch(
"BEGIN;
CREATE TABLE foo(x INTEGER);
CREATE TABLE bar(y TEXT);
COMMIT;",
)
}
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn execute<P>(&self, sql: &str, params: P) -> Result<usize, Error> where
P: Params,
pub fn execute<P>(&self, sql: &str, params: P) -> Result<usize, Error> where
P: Params,
Convenience method to prepare and execute a single SQL statement.
On success, returns the number of rows that were changed or inserted or
deleted (via sqlite3_changes
).
Example
With positional params
fn update_rows(conn: &Connection) {
match conn.execute("UPDATE foo SET bar = 'baz' WHERE qux = ?", [1i32]) {
Ok(updated) => println!("{} rows were updated", updated),
Err(err) => println!("update failed: {}", err),
}
}
With positional params of varying types
fn update_rows(conn: &Connection) {
match conn.execute(
"UPDATE foo SET bar = 'baz' WHERE qux = ?1 AND quux = ?2",
params![1i32, 1.5f64],
) {
Ok(updated) => println!("{} rows were updated", updated),
Err(err) => println!("update failed: {}", err),
}
}
With named params
fn insert(conn: &Connection) -> Result<usize> {
conn.execute(
"INSERT INTO test (name) VALUES (:name)",
&[(":name", "one")],
)
}
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn path(&self) -> Option<&Path>
pub fn path(&self) -> Option<&Path>
Returns the path to the database file, if one exists and is known.
Note that in some cases PRAGMA database_list is likely to be more robust.
sourcepub fn execute_named(
&self,
sql: &str,
params: &[(&str, &dyn ToSql)]
) -> Result<usize, Error>
👎 Deprecated: You can use execute
with named params now.
pub fn execute_named(
&self,
sql: &str,
params: &[(&str, &dyn ToSql)]
) -> Result<usize, Error>
You can use execute
with named params now.
Convenience method to prepare and execute a single SQL statement with named parameter(s).
On success, returns the number of rows that were changed or inserted or
deleted (via sqlite3_changes
).
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn last_insert_rowid(&self) -> i64
pub fn last_insert_rowid(&self) -> i64
Get the SQLite rowid of the most recent successful INSERT.
Uses sqlite3_last_insert_rowid under the hood.
sourcepub fn query_row<T, P, F>(&self, sql: &str, params: P, f: F) -> Result<T, Error> where
P: Params,
F: FnOnce(&Row<'_>) -> Result<T, Error>,
pub fn query_row<T, P, F>(&self, sql: &str, params: P, f: F) -> Result<T, Error> where
P: Params,
F: FnOnce(&Row<'_>) -> Result<T, Error>,
Convenience method to execute a query that is expected to return a single row.
Example
fn preferred_locale(conn: &Connection) -> Result<String> {
conn.query_row(
"SELECT value FROM preferences WHERE name='locale'",
[],
|row| row.get(0),
)
}
If the query returns more than one row, all rows except the first are ignored.
Returns Err(QueryReturnedNoRows)
if no results are returned. If the
query truly is optional, you can call .optional()
on the result of
this to get a Result<Option<T>>
.
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn query_row_named<T, F>(
&self,
sql: &str,
params: &[(&str, &dyn ToSql)],
f: F
) -> Result<T, Error> where
F: FnOnce(&Row<'_>) -> Result<T, Error>,
👎 Deprecated: You can use query_row
with named params now.
pub fn query_row_named<T, F>(
&self,
sql: &str,
params: &[(&str, &dyn ToSql)],
f: F
) -> Result<T, Error> where
F: FnOnce(&Row<'_>) -> Result<T, Error>,
You can use query_row
with named params now.
Convenience method to execute a query with named parameter(s) that is expected to return a single row.
If the query returns more than one row, all rows except the first are ignored.
Returns Err(QueryReturnedNoRows)
if no results are returned. If the
query truly is optional, you can call .optional()
on the result of
this to get a Result<Option<T>>
.
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn query_row_and_then<T, E, P, F>(
&self,
sql: &str,
params: P,
f: F
) -> Result<T, E> where
P: Params,
F: FnOnce(&Row<'_>) -> Result<T, E>,
E: From<Error>,
pub fn query_row_and_then<T, E, P, F>(
&self,
sql: &str,
params: P,
f: F
) -> Result<T, E> where
P: Params,
F: FnOnce(&Row<'_>) -> Result<T, E>,
E: From<Error>,
Convenience method to execute a query that is expected to return a
single row, and execute a mapping via f
on that returned row with
the possibility of failure. The Result
type of f
must implement
std::convert::From<Error>
.
Example
fn preferred_locale(conn: &Connection) -> Result<String> {
conn.query_row_and_then(
"SELECT value FROM preferences WHERE name='locale'",
[],
|row| row.get(0),
)
}
If the query returns more than one row, all rows except the first are ignored.
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub fn prepare(&self, sql: &str) -> Result<Statement<'_>, Error>
pub fn prepare(&self, sql: &str) -> Result<Statement<'_>, Error>
Prepare a SQL statement for execution.
Example
fn insert_new_people(conn: &Connection) -> Result<()> {
let mut stmt = conn.prepare("INSERT INTO People (name) VALUES (?)")?;
stmt.execute(["Joe Smith"])?;
stmt.execute(["Bob Jones"])?;
Ok(())
}
Failure
Will return Err
if sql
cannot be converted to a C-compatible string
or if the underlying SQLite call fails.
sourcepub unsafe fn handle(&self) -> *mut sqlite3
pub unsafe fn handle(&self) -> *mut sqlite3
Get access to the underlying SQLite database connection handle.
Warning
You should not need to use this function. If you do need to, please open an issue on the rusqlite repository and describe your use case.
Safety
This function is unsafe because it gives you raw access
to the SQLite connection, and what you do with it could impact the
safety of this Connection
.
sourcepub fn get_interrupt_handle(&self) -> InterruptHandle
pub fn get_interrupt_handle(&self) -> InterruptHandle
Get access to a handle that can be used to interrupt long running queries from another thread.
sourcepub fn is_autocommit(&self) -> bool
pub fn is_autocommit(&self) -> bool
Test for auto-commit mode. Autocommit mode is on by default.
Trait Implementations
sourceimpl<'tx> Deref for DontWoof<'tx>
impl<'tx> Deref for DontWoof<'tx>
type Target = Transaction<'tx>
type Target = Transaction<'tx>
The resulting type after dereferencing.
sourceimpl<'tx> From<Transaction<'tx>> for DontWoof<'tx>
impl<'tx> From<Transaction<'tx>> for DontWoof<'tx>
sourcefn from(tx: Transaction<'tx>) -> Self
fn from(tx: Transaction<'tx>) -> Self
Performs the conversion.
Auto Trait Implementations
impl<'tx> !RefUnwindSafe for DontWoof<'tx>
impl<'tx> !Send for DontWoof<'tx>
impl<'tx> !Sync for DontWoof<'tx>
impl<'tx> Unpin for DontWoof<'tx>
impl<'tx> !UnwindSafe for DontWoof<'tx>
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcepub fn borrow_mut(&mut self) -> &mut T
pub fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more