Struct mlua::prelude::LuaAnyUserData [−][src]
pub struct LuaAnyUserData<'lua>(_);
Expand description
Handle to an internal Lua userdata for any type that implements UserData
.
Similar to std::any::Any
, this provides an interface for dynamic type checking via the is
and borrow
methods.
Internally, instances are stored in a RefCell
, to best match the mutable semantics of the Lua
language.
Note
This API should only be used when necessary. Implementing UserData
already allows defining
methods which check the type and acquire a borrow behind the scenes.
Implementations
impl<'lua> AnyUserData<'lua>
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impl<'lua> AnyUserData<'lua>
[src]pub fn borrow<T: 'static + UserData>(&self) -> Result<Ref<'_, T>>
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pub fn borrow<T: 'static + UserData>(&self) -> Result<Ref<'_, T>>
[src]Borrow this userdata immutably if it is of type T
.
Errors
Returns a UserDataBorrowError
if the userdata is already mutably borrowed. Returns a
UserDataTypeMismatch
if the userdata is not of type T
.
pub fn borrow_mut<T: 'static + UserData>(&self) -> Result<RefMut<'_, T>>
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pub fn borrow_mut<T: 'static + UserData>(&self) -> Result<RefMut<'_, T>>
[src]Borrow this userdata mutably if it is of type T
.
Errors
Returns a UserDataBorrowMutError
if the userdata is already borrowed. Returns a
UserDataTypeMismatch
if the userdata is not of type T
.
pub fn set_user_value<V: ToLua<'lua>>(&self, v: V) -> Result<()>
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pub fn set_user_value<V: ToLua<'lua>>(&self, v: V) -> Result<()>
[src]Sets an associated value to this AnyUserData
.
The value may be any Lua value whatsoever, and can be retrieved with get_user_value
.
As Lua < 5.3 allows to store only tables, the value will be stored in a table at index 1.
pub fn get_user_value<V: FromLua<'lua>>(&self) -> Result<V>
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pub fn get_user_value<V: FromLua<'lua>>(&self) -> Result<V>
[src]Returns an associated value set by set_user_value
.
For Lua < 5.3 the value will be automatically extracted from the table wrapper from index 1.
pub fn get_metatable(&self) -> Result<UserDataMetatable<'lua>>
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pub fn get_metatable(&self) -> Result<UserDataMetatable<'lua>>
[src]Returns a metatable of this UserData
.
Returned UserDataMetatable
object wraps the original metatable and
provides safe access to its methods.
For T: UserData + 'static
returned metatable is shared among all instances of type T
.
Trait Implementations
impl<'lua> AsRef<AnyUserData<'lua>> for AnyUserData<'lua>
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impl<'lua> AsRef<AnyUserData<'lua>> for AnyUserData<'lua>
[src]impl<'lua> Clone for AnyUserData<'lua>
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impl<'lua> Clone for AnyUserData<'lua>
[src]fn clone(&self) -> AnyUserData<'lua>
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fn clone(&self) -> AnyUserData<'lua>
[src]Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0[src]
fn clone_from(&mut self, source: &Self)
1.0.0[src]Performs copy-assignment from source
. Read more
impl<'lua> Debug for AnyUserData<'lua>
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impl<'lua> Debug for AnyUserData<'lua>
[src]impl<'lua> FromLua<'lua> for AnyUserData<'lua>
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impl<'lua> FromLua<'lua> for AnyUserData<'lua>
[src]impl<'lua> PartialEq<AnyUserData<'lua>> for AnyUserData<'lua>
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impl<'lua> PartialEq<AnyUserData<'lua>> for AnyUserData<'lua>
[src]impl<'lua> Serialize for AnyUserData<'lua>
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impl<'lua> Serialize for AnyUserData<'lua>
[src]Auto Trait Implementations
impl<'lua> !RefUnwindSafe for AnyUserData<'lua>
impl<'lua> !Send for AnyUserData<'lua>
impl<'lua> !Sync for AnyUserData<'lua>
impl<'lua> Unpin for AnyUserData<'lua>
impl<'lua> !UnwindSafe for AnyUserData<'lua>
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> Serialize for T where
T: Serialize + ?Sized,
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impl<T> Serialize for T where
T: Serialize + ?Sized,
[src]pub fn erased_serialize(
&self,
serializer: &mut dyn Serializer
) -> Result<Ok, Error>
[src]
&self,
serializer: &mut dyn Serializer
) -> Result<Ok, Error>
impl<T> ToOwned for T where
T: Clone,
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impl<T> ToOwned for T where
T: Clone,
[src]type Owned = T
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
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pub fn to_owned(&self) -> T
[src]Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
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pub fn clone_into(&self, target: &mut T)
[src]🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more