[clang] [Sema] Migrate away from PointerUnion::dyn_cast (NFC) (PR #124391)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: Kazu Hirata (kazutakahirata)

<details>
<summary>Changes</summary>

Note that PointerUnion::dyn_cast has been soft deprecated in
PointerUnion.h:

  // FIXME: Replace the uses of is(), get() and dyn_cast() with
  //        isa&lt;T&gt;, cast&lt;T&gt; and the llvm::dyn_cast&lt;T&gt;

Literal migration would result in dyn_cast_if_present (see the
definition of PointerUnion::dyn_cast), but this patch uses dyn_cast
because we expect DeclOrIterator to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/124391.diff


1 Files Affected:

- (modified) clang/lib/Sema/SemaCodeComplete.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/Sema/SemaCodeComplete.cpp 
b/clang/lib/Sema/SemaCodeComplete.cpp
index 58f3efbe0daf89..bc0f6a9435f958 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -678,7 +678,7 @@ class ResultBuilder::ShadowMapEntry::iterator {
   }*/
 
   reference operator*() const {
-    if (const NamedDecl *ND = DeclOrIterator.dyn_cast<const NamedDecl *>())
+    if (const NamedDecl *ND = dyn_cast<const NamedDecl *>(DeclOrIterator))
       return reference(ND, SingleDeclIndex);
 
     return *cast<const DeclIndexPair *>(DeclOrIterator);

``````````

</details>


https://github.com/llvm/llvm-project/pull/124391
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