1 files changed, 82 insertions, 0 deletions
diff --git a/js/src/frontend/DecoratorEmitter.h b/js/src/frontend/DecoratorEmitter.h
new file mode 100644
index 0000000000..c5e90c7985
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+++ b/js/src/frontend/DecoratorEmitter.h
@@ -0,0 +1,82 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef frontend_DecoratorEmitter_h
+#define frontend_DecoratorEmitter_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/Maybe.h"
+
+#include "frontend/ParseNode.h"
+
+#include "js/AllocPolicy.h"
+#include "js/Vector.h"
+
+namespace js::frontend {
+
+struct BytecodeEmitter;
+
+class MOZ_STACK_CLASS DecoratorEmitter {
+ private:
+  BytecodeEmitter* bce_;
+
+ public:
+  enum Kind { Method, Getter, Setter, Field, Accessor, Class };
+
+  explicit DecoratorEmitter(BytecodeEmitter* bce);
+
+  [[nodiscard]] bool emitApplyDecoratorsToElementDefinition(
+      Kind kind, ParseNode* key, ListNode* decorators, bool isStatic);
+
+  [[nodiscard]] bool emitApplyDecoratorsToFieldDefinition(ParseNode* key,
+                                                          ListNode* decorators,
+                                                          bool isStatic);
+
+  [[nodiscard]] bool emitApplyDecoratorsToAccessorDefinition(
+      ParseNode* key, ListNode* decorators, bool isStatic);
+
+  [[nodiscard]] bool emitApplyDecoratorsToClassDefinition(ParseNode* key,
+                                                          ListNode* decorators);
+
+  [[nodiscard]] bool emitInitializeFieldOrAccessor();
+
+  [[nodiscard]] bool emitCreateAddInitializerFunction(
+      FunctionNode* addInitializerFunction, TaggedParserAtomIndex initializers);
+
+  [[nodiscard]] bool emitCallExtraInitializers(
+      TaggedParserAtomIndex extraInitializers);
+
+ private:
+  [[nodiscard]] bool emitPropertyKey(ParseNode* key);
+
+  [[nodiscard]] bool emitDecorationState();
+
+  [[nodiscard]] bool emitUpdateDecorationState();
+
+  [[nodiscard]] bool emitCallDecoratorForElement(Kind kind, ParseNode* key,
+                                                 bool isStatic,
+                                                 ParseNode* decorator);
+
+  [[nodiscard]] bool emitCreateDecoratorAccessObject();
+
+  [[nodiscard]] bool emitCheckIsUndefined();
+
+  [[nodiscard]] bool emitCreateAddInitializerFunction();
+
+  [[nodiscard]] bool emitCreateDecoratorContextObject(Kind kind, ParseNode* key,
+                                                      bool isStatic,
+                                                      TokenPos pos);
+
+  [[nodiscard]] bool emitHandleNewValueField(TaggedParserAtomIndex atom,
+                                             int8_t offset);
+
+  using DecoratorsVector = js::Vector<ParseNode*, 2, js::SystemAllocPolicy>;
+
+  [[nodiscard]] bool reverseDecoratorsToApplicationOrder(
+      const ListNode* decorators, DecoratorsVector& vec);
+};
+
+} /* namespace js::frontend */
+
+#endif /* frontend_DecoratorEmitter_h */