pub struct SharedPtr<T>where
T: ?Sized,{ /* private fields */ }
if ptr is no unique,none will be returned, or Some(&mut T) be returned.
Performs copy-assignment from
source
.
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Formats the value using the given formatter.
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Returns the “default value” for a type.
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The resulting type after dereferencing.
Dereferences the value.
Mutably dereferences the value.
Converts to this type from the input type.
实现 SharedPtr 到 SharePtr的转换
实现 SharedPtr 到 SharePtr的转换
注意,如果不是SharePtr cast Shardptr
那么如果 un_cast 将会出现不可预料的错误
Immutably borrows from an owned value.
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Mutably borrows from an owned value.
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Returns the argument unchanged.
Calls U::from(self)
.
That is, this conversion is whatever the implementation of
From<T> for U
chooses to do.
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning.
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Uses borrowed data to replace owned data, usually by cloning.
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The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.