[clang] [Sema] Migrate away from PointerUnion::dyn_cast (NFC) (PR #122855)

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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<T>, cast<T> and the llvm::dyn_cast<T>

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 DeclOrVector to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/122855.diff


1 Files Affected:

- (modified) clang/lib/Sema/SemaCodeComplete.cpp (+2-3) 


``````````diff
diff --git a/clang/lib/Sema/SemaCodeComplete.cpp b/clang/lib/Sema/SemaCodeComplete.cpp
index 1f398bb004fa30..8a848df70cc5a1 100644
--- a/clang/lib/Sema/SemaCodeComplete.cpp
+++ b/clang/lib/Sema/SemaCodeComplete.cpp
@@ -121,8 +121,7 @@ class ResultBuilder {
         return;
       }
 
-      if (const NamedDecl *PrevND =
-              DeclOrVector.dyn_cast<const NamedDecl *>()) {
+      if (const NamedDecl *PrevND = dyn_cast<const NamedDecl *>(DeclOrVector)) {
         // 1 -> 2 elements: create the vector of results and push in the
         // existing declaration.
         DeclIndexPairVector *Vec = new DeclIndexPairVector;
@@ -702,7 +701,7 @@ ResultBuilder::ShadowMapEntry::begin() const {
   if (DeclOrVector.isNull())
     return iterator();
 
-  if (const NamedDecl *ND = DeclOrVector.dyn_cast<const NamedDecl *>())
+  if (const NamedDecl *ND = dyn_cast<const NamedDecl *>(DeclOrVector))
     return iterator(ND, SingleDeclIndex);
 
   return iterator(cast<DeclIndexPairVector *>(DeclOrVector)->begin());

``````````

</details>


https://github.com/llvm/llvm-project/pull/122855