Struct magnus::r_typed_data::RTypedData
source · [−]#[repr(transparent)]pub struct RTypedData(_);
Expand description
Implementations
sourceimpl RTypedData
impl RTypedData
sourcepub fn from_value(val: Value) -> Option<Self>
pub fn from_value(val: Value) -> Option<Self>
Return Some(RTypedData)
if val
is a RTypedData
, None
otherwise.
Methods from Deref<Target = Value>
sourcepub unsafe fn to_s(&self) -> Result<Cow<'_, str>, Error>
pub unsafe fn to_s(&self) -> Result<Cow<'_, str>, Error>
Convert self
to a Rust string.
Safety
This may return a direct view of memory owned and managed by Ruby. Ruby may modify or free the memory backing the returned str, the caller must ensure this does not happen.
This can be used safely by immediately calling
into_owned
on the return value.
Examples
use magnus::{eval, QTRUE};
let value = QTRUE;
// safe as we neve give Ruby a chance to free the string.
let s = unsafe { value.to_s() }.unwrap().into_owned();
assert_eq!(s, "true");
sourcepub unsafe fn classname(&self) -> Cow<'_, str>
pub unsafe fn classname(&self) -> Cow<'_, str>
Return the name of self
’s class.
Safety
Ruby may modify or free the memory backing the returned str, the caller must ensure this does not happen.
This can be used safely by immediately calling
into_owned
on the return value.
Examples
use magnus::{eval, RHash};
let value = RHash::new();
// safe as we neve give Ruby a chance to free the string.
let s = unsafe { value.classname() }.into_owned();
assert_eq!(s, "Hash");
sourcepub fn try_convert<T>(&self) -> Result<T, Error> where
T: TryConvert,
pub fn try_convert<T>(&self) -> Result<T, Error> where
T: TryConvert,
Convert self
to the Rust type T
.
See the types that TryConvert
is implemented on for what this
method can convert to.
Examples
use magnus::{eval, Value};
assert_eq!(eval::<Value>("42").unwrap().try_convert::<i64>().unwrap(), 42);
assert_eq!(eval::<Value>("1.23").unwrap().try_convert::<i64>().unwrap(), 1);
assert_eq!(eval::<Value>("1").unwrap().try_convert::<f64>().unwrap(), 1.0);
assert_eq!(eval::<Value>("nil").unwrap().try_convert::<Option<i64>>().unwrap(), None);
assert_eq!(eval::<Value>("42").unwrap().try_convert::<Option<i64>>().unwrap(), Some(42));
Trait Implementations
sourceimpl Clone for RTypedData
impl Clone for RTypedData
sourcefn clone(&self) -> RTypedData
fn clone(&self) -> RTypedData
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for RTypedData
impl Debug for RTypedData
sourceimpl Deref for RTypedData
impl Deref for RTypedData
sourceimpl Display for RTypedData
impl Display for RTypedData
sourceimpl From<RTypedData> for Value
impl From<RTypedData> for Value
sourcefn from(val: RTypedData) -> Self
fn from(val: RTypedData) -> Self
Converts to this type from the input type.
sourceimpl Object for RTypedData
impl Object for RTypedData
sourcefn define_singleton_method<M>(self, name: &str, func: M) -> Result<(), Error> where
M: Method,
fn define_singleton_method<M>(self, name: &str, func: M) -> Result<(), Error> where
M: Method,
Define a singleton method in self
’s scope. Read more
sourcefn ivar_get<T, U>(self, name: T) -> Result<U, Error> where
T: Into<Id>,
U: TryConvert,
fn ivar_get<T, U>(self, name: T) -> Result<U, Error> where
T: Into<Id>,
U: TryConvert,
Get the value for the instance variable name
within self
’s scope. Read more
sourcefn ivar_set<T, U>(self, name: T, value: U) -> Result<(), Error> where
T: Into<Id>,
U: Into<Value>,
fn ivar_set<T, U>(self, name: T, value: U) -> Result<(), Error> where
T: Into<Id>,
U: Into<Value>,
Set the value for the instance variable name
within self
’s scope. Read more
impl Copy for RTypedData
impl ReprValue for RTypedData
Auto Trait Implementations
impl RefUnwindSafe for RTypedData
impl Send for RTypedData
impl Sync for RTypedData
impl Unpin for RTypedData
impl UnwindSafe for RTypedData
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more