LibJS: Switch is_array to ThrowCompletionOr

Userland/Libraries/LibJS/Runtime/ArrayConstructor.cpp

@@ -213,7 +213,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
 JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::is_array)
 {
     auto value = vm.argument(0);
-    return Value(value.is_array(global_object));
+    return Value(TRY_OR_DISCARD(value.is_array(global_object)));
 }
 
 // 23.1.2.3 Array.of ( ...items ), https://tc39.es/ecma262/#sec-array.of

Userland/Libraries/LibJS/Runtime/ArrayPrototype.cpp

@@ -107,9 +107,7 @@ static Object* array_species_create(GlobalObject& global_object, Object& origina
 {
     auto& vm = global_object.vm();
 
-    auto is_array = Value(&original_array).is_array(global_object);
-    if (vm.exception())
-        return {};
+    auto is_array = TRY_OR_DISCARD(Value(&original_array).is_array(global_object));
 
     if (!is_array) {
         auto array = Array::create(global_object, length);
@@ -593,7 +591,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayPrototype::concat)
     size_t n = 0;
 
     // 23.1.3.1.1 IsConcatSpreadable ( O ), https://tc39.es/ecma262/#sec-isconcatspreadable
-    auto is_concat_spreadable = [&vm, &global_object](Value const& val) {
+    auto is_concat_spreadable = [&vm, &global_object](Value const& val) -> bool {
         if (!val.is_object()) {
             return false;
         }
@@ -608,7 +606,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayPrototype::concat)
         if (!spreadable.is_undefined())
             return spreadable.to_boolean();
 
-        return val.is_array(global_object);
+        return TRY_OR_DISCARD(val.is_array(global_object));
     };
 
     auto append_to_new_array = [&vm, &is_concat_spreadable, &new_array, &global_object, &n](Value arg) {
@@ -1895,7 +1893,7 @@ static size_t flatten_into_array(GlobalObject& global_object, Object& new_array,
                 return {};
         }
 
-        if (depth > 0 && value.is_array(global_object)) {
+        if (depth > 0 && TRY_OR_DISCARD(value.is_array(global_object))) {
             if (vm.did_reach_stack_space_limit()) {
                 vm.throw_exception<Error>(global_object, ErrorType::CallStackSizeExceeded);
                 return {};

Userland/Libraries/LibJS/Runtime/JSONObject.cpp

@@ -54,9 +54,7 @@ String JSONObject::stringify_impl(GlobalObject& global_object, Value value, Valu
         if (replacer.as_object().is_function()) {
             state.replacer_function = &replacer.as_function();
         } else {
-            auto is_array = replacer.is_array(global_object);
-            if (vm.exception())
-                return {};
+            auto is_array = TRY_OR_DISCARD(replacer.is_array(global_object));
             if (is_array) {
                 auto& replacer_object = replacer.as_object();
                 auto replacer_length = TRY_OR_DISCARD(length_of_array_like(global_object, replacer_object));
@@ -200,9 +198,7 @@ String JSONObject::serialize_json_property(GlobalObject& global_object, Stringif
         return {};
     }
     if (value.is_object() && !value.is_function()) {
-        auto is_array = value.is_array(global_object);
-        if (vm.exception())
-            return {};
+        auto is_array = TRY_OR_DISCARD(value.is_array(global_object));
         if (is_array) {
             auto result = serialize_json_array(global_object, state, static_cast<Array&>(value.as_object()));
             if (vm.exception())
@@ -479,9 +475,7 @@ Value JSONObject::internalize_json_property(GlobalObject& global_object, Object*
     if (vm.exception())
         return {};
     if (value.is_object()) {
-        auto is_array = value.is_array(global_object);
-        if (vm.exception())
-            return {};
+        auto is_array = TRY_OR_DISCARD(value.is_array(global_object));
 
         auto& value_object = value.as_object();
         auto process_property = [&](const PropertyName& key) {

Userland/Libraries/LibJS/Runtime/ObjectPrototype.cpp

@@ -87,9 +87,7 @@ JS_DEFINE_NATIVE_FUNCTION(ObjectPrototype::to_string)
     VERIFY(object);
 
     // 4. Let isArray be ? IsArray(O).
-    auto is_array = Value(object).is_array(global_object);
-    if (vm.exception())
-        return {};
+    auto is_array = TRY_OR_DISCARD(Value(object).is_array(global_object));
 
     String builtin_tag;
 

Userland/Libraries/LibJS/Runtime/Value.cpp

@@ -192,8 +192,10 @@ static String double_to_string(double d)
 }
 
 // 7.2.2 IsArray ( argument ), https://tc39.es/ecma262/#sec-isarray
-bool Value::is_array(GlobalObject& global_object) const
+ThrowCompletionOr<bool> Value::is_array(GlobalObject& global_object) const
 {
+    auto& vm = global_object.vm();
+
     if (!is_object())
         return false;
     auto& object = as_object();
@@ -201,11 +203,8 @@ bool Value::is_array(GlobalObject& global_object) const
         return true;
     if (is<ProxyObject>(object)) {
         auto& proxy = static_cast<ProxyObject const&>(object);
-        if (proxy.is_revoked()) {
-            auto& vm = global_object.vm();
-            vm.throw_exception<TypeError>(global_object, ErrorType::ProxyRevoked);
-            return false;
-        }
+        if (proxy.is_revoked())
+            return vm.throw_completion<TypeError>(global_object, ErrorType::ProxyRevoked);
         return Value(&proxy.target()).is_array(global_object);
     }
     return false;

Userland/Libraries/LibJS/Runtime/Value.h

@@ -62,7 +62,7 @@ public:
     bool is_bigint() const { return m_type == Type::BigInt; };
     bool is_nullish() const { return is_null() || is_undefined(); }
     bool is_cell() const { return is_string() || is_accessor() || is_object() || is_bigint() || is_symbol(); }
-    bool is_array(GlobalObject&) const;
+    ThrowCompletionOr<bool> is_array(GlobalObject&) const;
     bool is_function() const;
     bool is_constructor() const;
     bool is_regexp(GlobalObject&) const;