[llvm-branch-commits] [clang-tools-extra] [clang-doc][NFC] Introduce Vector and Array abstractions (PR #184870)

[Paul Kirth via llvm-branch-commits]

https://github.com/ilovepi updated https://github.com/llvm/llvm-project/pull/184870

>From efca6bed007731241da90a97105d108b18024d75 Mon Sep 17 00:00:00 2001
From: Paul Kirth <paulkirth at google.com>
Date: Wed, 4 Mar 2026 23:35:17 +0000
Subject: [PATCH] [clang-doc][NFC] Introduce Vector and Array abstractions

Introduce OwningVec and OwningArray aliases for vector types we want to
eventually update for arena allocations.
---
 clang-tools-extra/clang-doc/Representation.h | 40 ++++++++++++--------
 1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/clang-tools-extra/clang-doc/Representation.h b/clang-tools-extra/clang-doc/Representation.h
index 4773b89255202..7174316faa726 100644
--- a/clang-tools-extra/clang-doc/Representation.h
+++ b/clang-tools-extra/clang-doc/Representation.h
@@ -32,6 +32,14 @@ namespace doc {
 // to be eventually transitioned to bare pointers in an arena.
 template <typename T> using OwnedPtr = std::unique_ptr<T>;
 
+// An abstraction for vectors that are populated and read sequentially.
+// To be eventually transitioned to llvm::ArrayRef for arena storage.
+template <typename T> using OwningArray = std::vector<T>;
+
+// An abstraction for lists that are dynamically managed (inserted/removed).
+// To be eventually transitioned to llvm::simple_ilist.
+template <typename T> using OwningVec = std::vector<T>;
+
 // SHA1'd hash of a USR.
 using SymbolID = std::array<uint8_t, 20>;
 
@@ -94,7 +102,7 @@ struct CommentInfo {
   // the vector.
   bool operator<(const CommentInfo &Other) const;
 
-  std::vector<OwnedPtr<CommentInfo>>
+  OwningVec<OwnedPtr<CommentInfo>>
       Children;              // List of child comments for this CommentInfo.
   SmallString<8> Direction;  // Parameter direction (for (T)ParamCommand).
   SmallString<16> Name;      // Name of the comment (for Verbatim and HTML).
@@ -192,13 +200,13 @@ struct ScopeChildren {
   //
   // Namespaces are not syntactically valid as children of records, but making
   // this general for all possible container types reduces code complexity.
-  std::vector<Reference> Namespaces;
-  std::vector<Reference> Records;
-  std::vector<FunctionInfo> Functions;
-  std::vector<EnumInfo> Enums;
-  std::vector<TypedefInfo> Typedefs;
-  std::vector<ConceptInfo> Concepts;
-  std::vector<VarInfo> Variables;
+  OwningArray<Reference> Namespaces;
+  OwningArray<Reference> Records;
+  OwningArray<FunctionInfo> Functions;
+  OwningArray<EnumInfo> Enums;
+  OwningArray<TypedefInfo> Typedefs;
+  OwningArray<ConceptInfo> Concepts;
+  OwningArray<VarInfo> Variables;
 
   void sort();
 };
@@ -241,7 +249,7 @@ struct TemplateSpecializationInfo {
   SymbolID SpecializationOf;
 
   // Template parameters applying to the specialized record/function.
-  std::vector<TemplateParamInfo> Params;
+  OwningArray<TemplateParamInfo> Params;
 };
 
 struct ConstraintInfo {
@@ -257,11 +265,11 @@ struct ConstraintInfo {
 // or an explicit template specialization.
 struct TemplateInfo {
   // May be empty for non-partial specializations.
-  std::vector<TemplateParamInfo> Params;
+  OwningArray<TemplateParamInfo> Params;
 
   // Set when this is a specialization of another record/function.
   std::optional<TemplateSpecializationInfo> Specialization;
-  std::vector<ConstraintInfo> Constraints;
+  OwningArray<ConstraintInfo> Constraints;
 };
 
 // Info for field types.
@@ -296,7 +304,7 @@ struct MemberTypeInfo : public FieldTypeInfo {
                     Other.Description);
   }
 
-  std::vector<CommentInfo> Description;
+  OwningArray<CommentInfo> Description;
 
   // Access level associated with this info (public, protected, private, none).
   // AS_public is set as default because the bitcode writer requires the enum
@@ -381,7 +389,7 @@ struct Info {
   InfoType IT = InfoType::IT_default;
 
   // Comment description of this decl.
-  std::vector<CommentInfo> Description;
+  OwningArray<CommentInfo> Description;
 
   SmallVector<Context, 4> Contexts;
 };
@@ -506,11 +514,11 @@ struct RecordInfo : public SymbolInfo {
   llvm::SmallVector<Reference, 4>
       VirtualParents; // List of virtual base/parent records.
 
-  std::vector<BaseRecordInfo>
+  OwningArray<BaseRecordInfo>
       Bases; // List of base/parent records; this includes inherited methods and
              // attributes
 
-  std::vector<FriendInfo> Friends;
+  OwningArray<FriendInfo> Friends;
 
   ScopeChildren Children;
 };
@@ -574,7 +582,7 @@ struct EnumValueInfo {
   SmallString<16> ValueExpr;
 
   /// Comment description of this field.
-  std::vector<CommentInfo> Description;
+  OwningArray<CommentInfo> Description;
 };
 
 // TODO: Expand to allow for documenting templating.