jkummerow@chromium.org | 28faa98 | 2012-04-13 09:58:30 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_ARGUMENTS_H_ |
| 29 | #define V8_ARGUMENTS_H_ |
| 30 | |
lrn@chromium.org | 1c09276 | 2011-05-09 09:42:16 +0000 | [diff] [blame] | 31 | #include "allocation.h" |
| 32 | |
kasperl@chromium.org | 71affb5 | 2009-05-26 05:44:31 +0000 | [diff] [blame] | 33 | namespace v8 { |
| 34 | namespace internal { |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 35 | |
| 36 | // Arguments provides access to runtime call parameters. |
| 37 | // |
| 38 | // It uses the fact that the instance fields of Arguments |
| 39 | // (length_, arguments_) are "overlayed" with the parameters |
| 40 | // (no. of parameters, and the parameter pointer) passed so |
| 41 | // that inside the C++ function, the parameters passed can |
| 42 | // be accessed conveniently: |
| 43 | // |
| 44 | // Object* Runtime_function(Arguments args) { |
| 45 | // ... use args[i] here ... |
| 46 | // } |
| 47 | |
| 48 | class Arguments BASE_EMBEDDED { |
| 49 | public: |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 50 | Arguments(int length, Object** arguments) |
| 51 | : length_(length), arguments_(arguments) { } |
| 52 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 53 | Object*& operator[] (int index) { |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 54 | ASSERT(0 <= index && index < length_); |
verwaest@chromium.org | 8a00e82 | 2013-06-10 15:11:22 +0000 | [diff] [blame] | 55 | return *(reinterpret_cast<Object**>(reinterpret_cast<intptr_t>(arguments_) - |
| 56 | index * kPointerSize)); |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 57 | } |
| 58 | |
| 59 | template <class S> Handle<S> at(int index) { |
| 60 | Object** value = &((*this)[index]); |
| 61 | // This cast checks that the object we're accessing does indeed have the |
| 62 | // expected type. |
| 63 | S::cast(*value); |
| 64 | return Handle<S>(reinterpret_cast<S**>(value)); |
| 65 | } |
| 66 | |
svenpanne@chromium.org | 6d786c9 | 2011-06-15 10:58:27 +0000 | [diff] [blame] | 67 | int smi_at(int index) { |
| 68 | return Smi::cast((*this)[index])->value(); |
| 69 | } |
| 70 | |
| 71 | double number_at(int index) { |
| 72 | return (*this)[index]->Number(); |
| 73 | } |
| 74 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 75 | // Get the total number of arguments including the receiver. |
mads.s.ager | 31e7138 | 2008-08-13 09:32:07 +0000 | [diff] [blame] | 76 | int length() const { return length_; } |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 77 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 78 | Object** arguments() { return arguments_; } |
kmillikin@chromium.org | 83e1682 | 2011-09-13 08:21:47 +0000 | [diff] [blame] | 79 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 80 | private: |
| 81 | int length_; |
| 82 | Object** arguments_; |
| 83 | }; |
| 84 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 85 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 86 | // mappings from old property callbacks to new ones |
| 87 | // F(old name, new name, return value, parameters...) |
| 88 | // |
| 89 | // These aren't included in the list as they have duplicate signatures |
| 90 | // F(NamedPropertyEnumerator, NamedPropertyEnumeratorCallback, ...) |
| 91 | // F(NamedPropertyGetter, NamedPropertyGetterCallback, ...) |
| 92 | |
| 93 | #define FOR_EACH_CALLBACK_TABLE_MAPPING_0(F) \ |
| 94 | F(IndexedPropertyEnumerator, IndexedPropertyEnumeratorCallback, v8::Array) \ |
| 95 | |
| 96 | #define FOR_EACH_CALLBACK_TABLE_MAPPING_1(F) \ |
| 97 | F(AccessorGetter, AccessorGetterCallback, v8::Value, v8::Local<v8::String>) \ |
| 98 | F(NamedPropertyQuery, \ |
| 99 | NamedPropertyQueryCallback, \ |
| 100 | v8::Integer, \ |
| 101 | v8::Local<v8::String>) \ |
| 102 | F(NamedPropertyDeleter, \ |
| 103 | NamedPropertyDeleterCallback, \ |
| 104 | v8::Boolean, \ |
| 105 | v8::Local<v8::String>) \ |
| 106 | F(IndexedPropertyGetter, \ |
| 107 | IndexedPropertyGetterCallback, \ |
| 108 | v8::Value, \ |
| 109 | uint32_t) \ |
| 110 | F(IndexedPropertyQuery, \ |
| 111 | IndexedPropertyQueryCallback, \ |
| 112 | v8::Integer, \ |
| 113 | uint32_t) \ |
| 114 | F(IndexedPropertyDeleter, \ |
| 115 | IndexedPropertyDeleterCallback, \ |
| 116 | v8::Boolean, \ |
| 117 | uint32_t) \ |
| 118 | |
| 119 | #define FOR_EACH_CALLBACK_TABLE_MAPPING_2(F) \ |
| 120 | F(NamedPropertySetter, \ |
| 121 | NamedPropertySetterCallback, \ |
| 122 | v8::Value, \ |
| 123 | v8::Local<v8::String>, \ |
| 124 | v8::Local<v8::Value>) \ |
| 125 | F(IndexedPropertySetter, \ |
| 126 | IndexedPropertySetterCallback, \ |
| 127 | v8::Value, \ |
| 128 | uint32_t, \ |
| 129 | v8::Local<v8::Value>) \ |
| 130 | |
| 131 | #define FOR_EACH_CALLBACK_TABLE_MAPPING_2_VOID_RETURN(F) \ |
| 132 | F(AccessorSetter, \ |
| 133 | AccessorSetterCallback, \ |
| 134 | void, \ |
| 135 | v8::Local<v8::String>, \ |
| 136 | v8::Local<v8::Value>) \ |
| 137 | |
| 138 | // All property callbacks as well as invocation callbacks |
| 139 | #define FOR_EACH_CALLBACK_TABLE_MAPPING(F) \ |
| 140 | F(InvocationCallback, FunctionCallback) \ |
| 141 | F(AccessorGetter, AccessorGetterCallback) \ |
| 142 | F(AccessorSetter, AccessorSetterCallback) \ |
| 143 | F(NamedPropertySetter, NamedPropertySetterCallback) \ |
| 144 | F(NamedPropertyQuery, NamedPropertyQueryCallback) \ |
| 145 | F(NamedPropertyDeleter, NamedPropertyDeleterCallback) \ |
| 146 | F(IndexedPropertyGetter, IndexedPropertyGetterCallback) \ |
| 147 | F(IndexedPropertySetter, IndexedPropertySetterCallback) \ |
| 148 | F(IndexedPropertyQuery, IndexedPropertyQueryCallback) \ |
| 149 | F(IndexedPropertyDeleter, IndexedPropertyDeleterCallback) \ |
| 150 | F(IndexedPropertyEnumerator, IndexedPropertyEnumeratorCallback) \ |
| 151 | |
| 152 | |
| 153 | // TODO(dcarney): Remove this class when old callbacks are gone. |
| 154 | class CallbackTable { |
| 155 | public: |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 156 | static const bool kStoreVoidFunctions = false; |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 157 | static inline bool ReturnsVoid(Isolate* isolate, void* function) { |
| 158 | CallbackTable* table = isolate->callback_table(); |
| 159 | bool contains = |
| 160 | table != NULL && |
| 161 | table->map_.occupancy() != 0 && |
| 162 | table->Contains(function); |
| 163 | return contains == kStoreVoidFunctions; |
| 164 | } |
| 165 | |
| 166 | STATIC_ASSERT(sizeof(intptr_t) == sizeof(AccessorGetterCallback)); |
| 167 | |
| 168 | template<typename F> |
| 169 | static inline void* FunctionToVoidPtr(F function) { |
| 170 | return reinterpret_cast<void*>(reinterpret_cast<intptr_t>(function)); |
| 171 | } |
| 172 | |
| 173 | #define WRITE_REGISTER(OldFunction, NewFunction) \ |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 174 | static NewFunction Register(Isolate* isolate, OldFunction f) { \ |
| 175 | InsertCallback(isolate, FunctionToVoidPtr(f), false); \ |
| 176 | return reinterpret_cast<NewFunction>(f); \ |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 177 | } \ |
| 178 | \ |
verwaest@chromium.org | d4be0f0 | 2013-06-05 13:39:03 +0000 | [diff] [blame] | 179 | static NewFunction Register(Isolate* isolate, NewFunction f) { \ |
| 180 | InsertCallback(isolate, FunctionToVoidPtr(f), true); \ |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 181 | return f; \ |
| 182 | } |
| 183 | FOR_EACH_CALLBACK_TABLE_MAPPING(WRITE_REGISTER) |
| 184 | #undef WRITE_REGISTER |
| 185 | |
| 186 | private: |
| 187 | CallbackTable(); |
| 188 | bool Contains(void* function); |
| 189 | static void InsertCallback(Isolate* isolate, |
| 190 | void* function, |
| 191 | bool returns_void); |
| 192 | HashMap map_; |
| 193 | DISALLOW_COPY_AND_ASSIGN(CallbackTable); |
| 194 | }; |
| 195 | |
| 196 | |
ager@chromium.org | b26c50a | 2010-03-26 09:27:16 +0000 | [diff] [blame] | 197 | // Custom arguments replicate a small segment of stack that can be |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 198 | // accessed through an Arguments object the same way the actual stack |
| 199 | // can. |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 200 | template<int kArrayLength> |
| 201 | class CustomArgumentsBase : public Relocatable { |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 202 | public: |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 203 | virtual inline void IterateInstance(ObjectVisitor* v) { |
| 204 | v->VisitPointers(values_, values_ + kArrayLength); |
| 205 | } |
| 206 | protected: |
| 207 | inline Object** end() { return values_ + kArrayLength - 1; } |
| 208 | explicit inline CustomArgumentsBase(Isolate* isolate) |
| 209 | : Relocatable(isolate) {} |
| 210 | Object* values_[kArrayLength]; |
| 211 | }; |
| 212 | |
| 213 | |
| 214 | template<typename T> |
| 215 | class CustomArguments : public CustomArgumentsBase<T::kArgsLength> { |
| 216 | public: |
| 217 | static const int kReturnValueOffset = T::kReturnValueIndex; |
| 218 | |
| 219 | typedef CustomArgumentsBase<T::kArgsLength> Super; |
| 220 | ~CustomArguments() { |
| 221 | // TODO(dcarney): create a new zap value for this. |
| 222 | this->end()[kReturnValueOffset] = |
| 223 | reinterpret_cast<Object*>(kHandleZapValue); |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 224 | } |
fschneider@chromium.org | e03fb64 | 2010-11-01 12:34:09 +0000 | [diff] [blame] | 225 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 226 | protected: |
| 227 | explicit inline CustomArguments(Isolate* isolate) : Super(isolate) {} |
| 228 | |
| 229 | template<typename V> |
| 230 | v8::Handle<V> GetReturnValue(Isolate* isolate); |
| 231 | |
| 232 | inline Isolate* isolate() { |
| 233 | return reinterpret_cast<Isolate*>(this->end()[T::kIsolateIndex]); |
| 234 | } |
| 235 | }; |
| 236 | |
| 237 | |
| 238 | class PropertyCallbackArguments |
| 239 | : public CustomArguments<PropertyCallbackInfo<Value> > { |
| 240 | public: |
| 241 | typedef PropertyCallbackInfo<Value> T; |
| 242 | typedef CustomArguments<T> Super; |
| 243 | static const int kArgsLength = T::kArgsLength; |
| 244 | static const int kThisIndex = T::kThisIndex; |
| 245 | static const int kHolderIndex = T::kHolderIndex; |
| 246 | |
| 247 | PropertyCallbackArguments(Isolate* isolate, |
| 248 | Object* data, |
| 249 | Object* self, |
| 250 | JSObject* holder) |
| 251 | : Super(isolate) { |
| 252 | Object** values = this->end(); |
| 253 | values[T::kThisIndex] = self; |
| 254 | values[T::kHolderIndex] = holder; |
| 255 | values[T::kDataIndex] = data; |
| 256 | values[T::kIsolateIndex] = reinterpret_cast<Object*>(isolate); |
verwaest@chromium.org | 8a00e82 | 2013-06-10 15:11:22 +0000 | [diff] [blame] | 257 | // Here the hole is set as default value. |
| 258 | // It cannot escape into js as it's remove in Call below. |
| 259 | values[T::kReturnValueDefaultValueIndex] = |
| 260 | isolate->heap()->the_hole_value(); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 261 | values[T::kReturnValueIndex] = isolate->heap()->the_hole_value(); |
| 262 | ASSERT(values[T::kHolderIndex]->IsHeapObject()); |
| 263 | ASSERT(values[T::kIsolateIndex]->IsSmi()); |
fschneider@chromium.org | e03fb64 | 2010-11-01 12:34:09 +0000 | [diff] [blame] | 264 | } |
| 265 | |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 266 | /* |
| 267 | * The following Call functions wrap the calling of all callbacks to handle |
| 268 | * calling either the old or the new style callbacks depending on which one |
| 269 | * has been registered. |
| 270 | * For old callbacks which return an empty handle, the ReturnValue is checked |
| 271 | * and used if it's been set to anything inside the callback. |
| 272 | * New style callbacks always use the return value. |
| 273 | */ |
| 274 | #define WRITE_CALL_0(OldFunction, NewFunction, ReturnValue) \ |
| 275 | v8::Handle<ReturnValue> Call(OldFunction f); \ |
| 276 | |
| 277 | #define WRITE_CALL_1(OldFunction, NewFunction, ReturnValue, Arg1) \ |
| 278 | v8::Handle<ReturnValue> Call(OldFunction f, Arg1 arg1); \ |
| 279 | |
| 280 | #define WRITE_CALL_2(OldFunction, NewFunction, ReturnValue, Arg1, Arg2) \ |
| 281 | v8::Handle<ReturnValue> Call(OldFunction f, Arg1 arg1, Arg2 arg2); \ |
| 282 | |
| 283 | #define WRITE_CALL_2_VOID(OldFunction, NewFunction, ReturnValue, Arg1, Arg2) \ |
| 284 | void Call(OldFunction f, Arg1 arg1, Arg2 arg2); \ |
| 285 | |
| 286 | FOR_EACH_CALLBACK_TABLE_MAPPING_0(WRITE_CALL_0) |
| 287 | FOR_EACH_CALLBACK_TABLE_MAPPING_1(WRITE_CALL_1) |
| 288 | FOR_EACH_CALLBACK_TABLE_MAPPING_2(WRITE_CALL_2) |
| 289 | FOR_EACH_CALLBACK_TABLE_MAPPING_2_VOID_RETURN(WRITE_CALL_2_VOID) |
| 290 | |
| 291 | #undef WRITE_CALL_0 |
| 292 | #undef WRITE_CALL_1 |
| 293 | #undef WRITE_CALL_2 |
| 294 | #undef WRITE_CALL_2_VOID |
| 295 | }; |
| 296 | |
| 297 | |
| 298 | class FunctionCallbackArguments |
| 299 | : public CustomArguments<FunctionCallbackInfo<Value> > { |
| 300 | public: |
| 301 | typedef FunctionCallbackInfo<Value> T; |
| 302 | typedef CustomArguments<T> Super; |
| 303 | static const int kArgsLength = T::kArgsLength; |
| 304 | |
| 305 | FunctionCallbackArguments(internal::Isolate* isolate, |
| 306 | internal::Object* data, |
| 307 | internal::JSFunction* callee, |
| 308 | internal::Object* holder, |
| 309 | internal::Object** argv, |
| 310 | int argc, |
| 311 | bool is_construct_call) |
| 312 | : Super(isolate), |
| 313 | argv_(argv), |
| 314 | argc_(argc), |
| 315 | is_construct_call_(is_construct_call) { |
| 316 | Object** values = end(); |
| 317 | values[T::kDataIndex] = data; |
| 318 | values[T::kCalleeIndex] = callee; |
| 319 | values[T::kHolderIndex] = holder; |
| 320 | values[T::kIsolateIndex] = reinterpret_cast<internal::Object*>(isolate); |
verwaest@chromium.org | 8a00e82 | 2013-06-10 15:11:22 +0000 | [diff] [blame] | 321 | // Here the hole is set as default value. |
| 322 | // It cannot escape into js as it's remove in Call below. |
| 323 | values[T::kReturnValueDefaultValueIndex] = |
| 324 | isolate->heap()->the_hole_value(); |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 325 | values[T::kReturnValueIndex] = isolate->heap()->the_hole_value(); |
| 326 | ASSERT(values[T::kCalleeIndex]->IsJSFunction()); |
| 327 | ASSERT(values[T::kHolderIndex]->IsHeapObject()); |
| 328 | ASSERT(values[T::kIsolateIndex]->IsSmi()); |
| 329 | } |
| 330 | |
| 331 | /* |
| 332 | * The following Call function wraps the calling of all callbacks to handle |
| 333 | * calling either the old or the new style callbacks depending on which one |
| 334 | * has been registered. |
| 335 | * For old callbacks which return an empty handle, the ReturnValue is checked |
| 336 | * and used if it's been set to anything inside the callback. |
| 337 | * New style callbacks always use the return value. |
| 338 | */ |
| 339 | v8::Handle<v8::Value> Call(InvocationCallback f); |
jkummerow@chromium.org | 3ee08a6 | 2012-04-13 13:01:33 +0000 | [diff] [blame] | 340 | |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 341 | private: |
ulan@chromium.org | bf9432e | 2013-05-22 14:05:23 +0000 | [diff] [blame] | 342 | internal::Object** argv_; |
| 343 | int argc_; |
| 344 | bool is_construct_call_; |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 345 | }; |
| 346 | |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 347 | |
| 348 | #define DECLARE_RUNTIME_FUNCTION(Type, Name) \ |
danno@chromium.org | f005df6 | 2013-04-30 16:36:45 +0000 | [diff] [blame] | 349 | Type Name(int args_length, Object** args_object, Isolate* isolate) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 350 | |
danno@chromium.org | f005df6 | 2013-04-30 16:36:45 +0000 | [diff] [blame] | 351 | #define RUNTIME_FUNCTION(Type, Name) \ |
| 352 | static Type __RT_impl_##Name(Arguments args, Isolate* isolate); \ |
| 353 | Type Name(int args_length, Object** args_object, Isolate* isolate) { \ |
| 354 | Arguments args(args_length, args_object); \ |
| 355 | return __RT_impl_##Name(args, isolate); \ |
| 356 | } \ |
| 357 | static Type __RT_impl_##Name(Arguments args, Isolate* isolate) |
kmillikin@chromium.org | c36ce6e | 2011-04-04 08:25:31 +0000 | [diff] [blame] | 358 | |
danno@chromium.org | f005df6 | 2013-04-30 16:36:45 +0000 | [diff] [blame] | 359 | #define RUNTIME_ARGUMENTS(isolate, args) \ |
| 360 | args.length(), args.arguments(), isolate |
sgjesse@chromium.org | c514574 | 2009-10-07 09:00:33 +0000 | [diff] [blame] | 361 | |
christian.plesner.hansen | 43d26ec | 2008-07-03 15:10:15 +0000 | [diff] [blame] | 362 | } } // namespace v8::internal |
| 363 | |
| 364 | #endif // V8_ARGUMENTS_H_ |