[flang] [llvm] [Flang][OpenMP][Sema] Adding parsing and semantic support for scan directive. (PR #102792)

[Kiran Chandramohan via llvm-commits]

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@@ -70,6 +72,43 @@ class OmpStructureChecker
         ) {
   }
   using llvmOmpClause = const llvm::omp::Clause;
+  using ReductionModifier = parser::OmpReductionClause::ReductionModifier;
+  using Symbol = Fortran::semantics::Symbol;
+  class ScanReductionInfo {
+    std::set<Symbol *> usedInScan;
+    std::map<Symbol *, ReductionModifier> reductionMod;
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kiranchandramohan wrote:

Do we still need this map and stack, now that we can go from the inclusive or exclusive clauses to the reduction symbol?

https://github.com/llvm/llvm-project/pull/102792