[flang-commits] [flang] [flang][openmp]Add UserReductionDetails and use in DECLARE REDUCTION (PR #131628)

[Peter Klausler via flang-commits]

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@@ -701,14 +703,41 @@ class GenericDetails {
 };
 llvm::raw_ostream &operator<<(llvm::raw_ostream &, const GenericDetails &);
 
+// Used for OpenMP DECLARE REDUCTION, it holds the information
+// needed to resolve which declaration (there could be multiple
+// with the same name) to use for a given type.
+class UserReductionDetails {
+public:
+  using TypeVector = std::vector<const DeclTypeSpec *>;
+  using DeclInfo = std::variant<const parser::OpenMPDeclareReductionConstruct *,
+      const parser::OmpMetadirectiveDirective *>;
+  using DeclVector = std::vector<DeclInfo>;
+
+  UserReductionDetails() = default;
+
+  void AddType(const DeclTypeSpec *type) { typeList_.push_back(type); }
+  const TypeVector &GetTypeList() const { return typeList_; }
+
+  bool SupportsType(const DeclTypeSpec *type) const {
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klausler wrote:

use a reference argument, not a pointer

https://github.com/llvm/llvm-project/pull/131628