LibJS: Convert create_global_function_binding() to ThrowCompletionOr

Userland/Libraries/LibJS/AST.cpp

@@ -3725,9 +3725,7 @@ ThrowCompletionOr<void> Program::global_declaration_instantiation(Interpreter& i
 
     for (auto& declaration : functions_to_initialize) {
         auto* function = ECMAScriptFunctionObject::create(global_object, declaration.name(), declaration.body(), declaration.parameters(), declaration.function_length(), &global_environment, private_environment, declaration.kind(), declaration.is_strict_mode(), declaration.might_need_arguments_object(), declaration.contains_direct_call_to_eval());
-        global_environment.create_global_function_binding(declaration.name(), function, false);
-        if (auto* exception = interpreter.exception())
-            return throw_completion(exception->value());
+        TRY(global_environment.create_global_function_binding(declaration.name(), function, false));
     }
 
     for (auto& var_name : declared_var_names)

Userland/Libraries/LibJS/Runtime/AbstractOperations.cpp

@@ -746,9 +746,7 @@ ThrowCompletionOr<void> eval_declaration_instantiation(VM& vm, GlobalObject& glo
     for (auto& declaration : functions_to_initialize) {
         auto* function = ECMAScriptFunctionObject::create(global_object, declaration.name(), declaration.body(), declaration.parameters(), declaration.function_length(), lexical_environment, private_environment, declaration.kind(), declaration.is_strict_mode(), declaration.might_need_arguments_object());
         if (global_var_environment) {
-            global_var_environment->create_global_function_binding(declaration.name(), function, true);
-            if (auto* exception = vm.exception())
-                return throw_completion(exception->value());
+            TRY(global_var_environment->create_global_function_binding(declaration.name(), function, true));
         } else {
             auto binding_exists = MUST(variable_environment->has_binding(declaration.name()));
 

Userland/Libraries/LibJS/Runtime/GlobalEnvironment.cpp

@@ -274,17 +274,14 @@ ThrowCompletionOr<void> GlobalEnvironment::create_global_var_binding(FlyString c
 }
 
 // 9.1.1.4.18 CreateGlobalFunctionBinding ( N, V, D ), https://tc39.es/ecma262/#sec-createglobalfunctionbinding
-void GlobalEnvironment::create_global_function_binding(FlyString const& name, Value value, bool can_be_deleted)
+ThrowCompletionOr<void> GlobalEnvironment::create_global_function_binding(FlyString const& name, Value value, bool can_be_deleted)
 {
     // 1. Let ObjRec be envRec.[[ObjectRecord]].
     // 2. Let globalObject be ObjRec.[[BindingObject]].
     auto& global_object = m_object_record->binding_object();
 
     // 3. Let existingProp be ? globalObject.[[GetOwnProperty]](N).
-    auto existing_prop_or_error = global_object.internal_get_own_property(name);
-    if (existing_prop_or_error.is_error())
-        return;
-    auto existing_prop = existing_prop_or_error.release_value();
+    auto existing_prop = TRY(global_object.internal_get_own_property(name));
 
     PropertyDescriptor desc;
 
@@ -300,14 +297,10 @@ void GlobalEnvironment::create_global_function_binding(FlyString const& name, Va
     }
 
     // 6. Perform ? DefinePropertyOrThrow(globalObject, N, desc).
-    auto result_or_error = global_object.define_property_or_throw(name, desc);
-    if (result_or_error.is_error())
-        return;
+    TRY(global_object.define_property_or_throw(name, desc));
 
     // 7. Perform ? Set(globalObject, N, V, false).
-    result_or_error = global_object.set(name, value, Object::ShouldThrowExceptions::Yes);
-    if (result_or_error.is_error())
-        return;
+    TRY(global_object.set(name, value, Object::ShouldThrowExceptions::Yes));
 
     // 8. Let varDeclaredNames be envRec.[[VarNames]].
     // 9. If varDeclaredNames does not contain N, then
@@ -317,6 +310,7 @@ void GlobalEnvironment::create_global_function_binding(FlyString const& name, Va
     }
 
     // 10. Return NormalCompletion(empty).
+    return {};
 }
 
 }

Userland/Libraries/LibJS/Runtime/GlobalEnvironment.h

@@ -37,7 +37,7 @@ public:
     ThrowCompletionOr<bool> can_declare_global_var(FlyString const& name) const;
     ThrowCompletionOr<bool> can_declare_global_function(FlyString const& name) const;
     ThrowCompletionOr<void> create_global_var_binding(FlyString const& name, bool can_be_deleted);
-    void create_global_function_binding(FlyString const& name, Value, bool can_be_deleted);
+    ThrowCompletionOr<void> create_global_function_binding(FlyString const& name, Value, bool can_be_deleted);
 
 private:
     virtual bool is_global_environment() const override { return true; }