[clang] [C++20][Modules] Implement P1857R3 Modules Dependency Discovery (PR #107168)

[via cfe-commits]

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@@ -2485,11 +2536,12 @@ class Preprocessor {
   }
 
   /// If we're importing a standard C++20 Named Modules.
-  bool isInImportingCXXNamedModules() const {
-    // NamedModuleImportPath will be non-empty only if we're importing
-    // Standard C++ named modules.
-    return !NamedModuleImportPath.empty() && getLangOpts().CPlusPlusModules &&
-           !IsAtImport;
+  bool isImportingCXXNamedModules() const {
+    return getLangOpts().CPlusPlusModules && ImportingCXXNamedModules;
+  }
+
+  bool isDeclaringCXXNamedModules() const {
+    return getLangOpts().CPlusPlusModules && DeclaringCXXNamedModules;
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yronglin wrote:

Fixed

https://github.com/llvm/llvm-project/pull/107168