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Commit2676918

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Rollup merge ofrust-lang#125575 - dingxiangfei2009:derive-smart-ptr, r=davidtwco
SmartPointer derive-macro<!--If this PR is related to an unstable feature or an otherwise tracked effort,please link to the relevant tracking issue here. If you don't know of a relatedtracking issue or there are none, feel free to ignore this.This PR will get automatically assigned to a reviewer. In case you would likea specific user to review your work, you can assign it to them by using r​? <reviewer name>-->Possibly replacingrust-lang#123472 for continued upkeep of the proposalrust-lang/rfcs#3621 and implementation of the tracking issuerust-lang#123430.cc `@Darksonn` `@wedsonaf`
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‎core/src/marker.rs‎

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@@ -1018,3 +1018,12 @@ pub trait FnPtr: Copy + Clone {
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#[lang ="fn_ptr_addr"]
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fnaddr(self) ->*const();
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}
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/// Derive macro generating impls of traits related to smart pointers.
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#[cfg(not(bootstrap))]
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#[rustc_builtin_macro]
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#[allow_internal_unstable(dispatch_from_dyn, coerce_unsized, unsize)]
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#[unstable(feature ="derive_smart_pointer", issue ="123430")]
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pub macroSmartPointer($item:item){
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/* compiler built-in */
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}

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