Basics: add a stub for centralized configurations for block list

Author: nkcsgexi

include/swift/AST/ASTContext.h

@@ -30,6 +30,7 @@
 #include "swift/Basic/LangOptions.h"
 #include "swift/Basic/Located.h"
 #include "swift/Basic/Malloc.h"
+#include "swift/Basic/BlockList.h"
 #include "swift/SymbolGraphGen/SymbolGraphOptions.h"
 #include "clang/AST/DeclTemplate.h"
 #include "llvm/ADT/ArrayRef.h"
@@ -359,6 +360,8 @@ class ASTContext final {
   /// The Swift module currently being compiled.
   ModuleDecl *MainModule = nullptr;
 
+  /// The block list where we can find special actions based on module name;
+  BlockListStore blockListConfig;
 private:
   /// The current generation number, which reflects the number of
   /// times that external modules have been loaded.

include/swift/Basic/BlockList.h

@@ -0,0 +1,50 @@
+//===--- BlockList.h ---------------------------------------------*- C++ -*-===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines some miscellaneous overloads of hash_value() and
+// simple_display().
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SWIFT_BASIC_BLOCKLIST_H
+#define SWIFT_BASIC_BLOCKLIST_H
+
+#include "swift/Basic/LLVM.h"
+#include "llvm/ADT/StringRef.h"
+
+namespace swift {
+
+enum class BlockListAction : uint8_t {
+  ShouldUseBinaryModule = 0,
+  ShouldUseTextualModule,
+};
+
+enum class BlockListKeyKind: uint8_t {
+  ModuleName,
+  ProjectName
+};
+
+class BlockListStore {
+public:
+  struct Implementation;
+  bool hasBlockListAction(StringRef key, BlockListKeyKind keyKind,
+                          BlockListAction action);
+  void addConfigureFilePath(StringRef path);
+  BlockListStore();
+  ~BlockListStore();
+private:
+  Implementation &Impl;
+};
+
+} // namespace swift
+
+#endif // SWIFT_BASIC_BLOCKLIST_H

lib/Basic/BlockList.cpp

@@ -0,0 +1,41 @@
+//===--- BlockList.cpp - BlockList utilities ------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+#include "swift/Basic/BlockList.h"
+
+struct swift::BlockListStore::Implementation {
+  void addConfigureFilePath(StringRef path);
+  bool hasBlockListAction(StringRef key, BlockListKeyKind keyKind,
+                          BlockListAction action);
+};
+
+swift::BlockListStore::BlockListStore(): Impl(*new Implementation()) {}
+
+swift::BlockListStore::~BlockListStore() { delete &Impl; }
+
+bool swift::BlockListStore::hasBlockListAction(StringRef key,
+    BlockListKeyKind keyKind, BlockListAction action) {
+  return Impl.hasBlockListAction(key, keyKind, action);
+}
+
+void swift::BlockListStore::addConfigureFilePath(StringRef path) {
+  Impl.addConfigureFilePath(path);
+}
+
+bool swift::BlockListStore::Implementation::hasBlockListAction(StringRef key,
+    BlockListKeyKind keyKind, BlockListAction action) {
+  return false;
+}
+
+void swift::BlockListStore::Implementation::addConfigureFilePath(StringRef path) {
+
+}

lib/Basic/CMakeLists.txt

@@ -78,6 +78,7 @@ add_swift_host_library(swiftBasic STATIC
   Unicode.cpp
   UUID.cpp
   Version.cpp
+  BlockList.cpp
 
   ${llvm_revision_inc}
   ${clang_revision_inc}