[clang] [AST] Migrate away from PointerUnion::dyn_cast (NFC) (PR #125335)

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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 InVectors.front() and P to be nonnull.


---
Full diff: https://github.com/llvm/llvm-project/pull/125335.diff


1 Files Affected:

- (modified) clang/lib/AST/TemplateName.cpp (+1-1) 


``````````diff
diff --git a/clang/lib/AST/TemplateName.cpp b/clang/lib/AST/TemplateName.cpp
index 3a1eb1ca12f453..9e0a7dc2b8cdcb 100644
--- a/clang/lib/AST/TemplateName.cpp
+++ b/clang/lib/AST/TemplateName.cpp
@@ -144,7 +144,7 @@ TemplateName::TemplateName(DeducedTemplateStorage *Deduced)
 bool TemplateName::isNull() const { return Storage.isNull(); }
 
 TemplateName::NameKind TemplateName::getKind() const {
-  if (auto *ND = Storage.dyn_cast<Decl *>()) {
+  if (auto *ND = dyn_cast<Decl *>(Storage)) {
     if (isa<UsingShadowDecl>(ND))
       return UsingTemplate;
     assert(isa<TemplateDecl>(ND));

``````````

</details>


https://github.com/llvm/llvm-project/pull/125335