[clang] [BoundsSafety][NFC] Introduce LateParsedTypeAttribute for late-parsed type attributes (PR #192799)

Sat Apr 18 10:18:50 PDT 2026

llvmbot wrote:

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@llvm/pr-subscribers-clang

Author: Yeoul Na (rapidsna)

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<summary>Changes</summary>

Preparatory refactoring for llvm/llvm-project#<!-- -->179612. The new late parsing approach needs a distinct data structure to carry type-attribute-specific information through the late parsing pipeline, separate from declaration-level late-parsed attributes.
- Add LateParsedTypeAttribute subtyping LateParsedAttribute
- Add LPA_Kind enum and LLVM-style RTTI to distinguish declaration vs type late-parsed attributes
- Add ParseLexedTypeAttribute and LateTypeAttrParserCallback to Parser
- Extract the shared token setup, parsing, and cleanup logic from ParseLexedCAttribute and ParseLexedTypeAttribute into a common ParseLexedCAttributeTokens helper.

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Full diff: https://github.com/llvm/llvm-project/pull/192799.diff

4 Files Affected:

- (modified) clang/include/clang/Parse/Parser.h (+102-63) 
- (modified) clang/include/clang/Sema/DeclSpec.h (+27) 
- (modified) clang/lib/Parse/ParseCXXInlineMethods.cpp (+9-7) 
- (modified) clang/lib/Parse/ParseDecl.cpp (+37-10) 

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https://github.com/llvm/llvm-project/pull/192799