UDocumentation UE5.7 10.02.2026 (Source)
API documentation for Unreal Engine 5.7
WindowsPlatformCompilerSetup.h
Go to the documentation of this file.
1// Copyright Epic Games, Inc. All Rights Reserved.
2
3#pragma once
4
5// HEADER_UNIT_SKIP - Not included directly
6
7#if !PLATFORM_WINDOWS
8#error PLATFORM_WINDOWS not defined
9#endif
10
11//
12// If LLVM Clang is used, we require at minimum v18 to compile
13//
14#if defined(__clang__)
15static_assert(__clang_major__ >= 18, "LLVM Clang v18 or greater is required to build Unreal Engine.");
16#endif
17
18//
19// We require at minimum Visual Studio 2022 v17.8 to compile
20//
21static_assert(_MSC_VER >= 1938, "Visual Studio 2022 v17.8 (MSVC 14.38) or greater is required to build Unreal Engine.");
22
23//
24// Manually enable all warnings as errors, except ones that are explicitly skipped.
25// Warnings that we explicitly disable later are still included in there.
26//
27
28#pragma warning (error: 4001 4002 4003 4006 4007 4008 4010 4013 4015 4018 4019 4020 4022 4023 4024 4025 4026 4027 4028 4029 4030 4031 4032 4033 4034 4035 4036 4038 4041 4042 4045 4047 4048 4049 4051 4052 4053 4054 4055 4056 4057 4060 4064 4065 4066 4067 4068 4069 4073 4074 4075 4076 4077 4079 4080 4081 4083 4085 4086 4087 4088 4089 4090 4091 4092 4094 4096 4097 4098 4099)
29#pragma warning (error: 4100 4101 4102 4103 4109 4112 4113 4114 4115 4116 4117 4119 4120 4121 4122 4123 4124 4125 4127 4129 4130 4131 4132 4133 4137 4138 4141 4142 4143 4144 4145 4146 4150 4152 4153 4154 4155 4156 4157 4158 4159 4160 4161 4162 4163 4164 4166 4167 4168 4172 4174 4175 4176 4177 4178 4179 4180 4181 4182 4183 4185 4186 4187 4188 4189 4190 4191 4192 4193 4194 4195 4196 4197 4199)
30#pragma warning (error: 4200 4201 4202 4203 4204 4205 4206 4207 4208 4210 4211 4212 4213 4214 4215 4216 4218 4220 4221 4223 4224 4226 4227 4228 4229 4230 4232 4233 4234 4235 4237 4238 4239 4240 4243 4245 4250 4251 4255 4256 4258 4263 4264 4267 4268 4269 4272 4273 4274 4275 4276 4277 4278 4279 4280 4281 4282 4283 4285 4286 4287 4288 4289 4290 4291 4293 4295 4297 4298 4299)
31#pragma warning (error: 4301 4302 4303 4306 4308 4309 4310 4313 4314 4315 4316 4318 4319 4321 4322 4323 4324 4325 4326 4327 4328 4329 4330 4333 4334 4335 4336 4337 4338 4340 4343 4344 4346 4348 4352 4353 4355 4356 4357 4358 4359 4362 4364 4366 4367 4368 4369 4374 4375 4376 4377 4378 4379 4380 4381 4382 4383 4384 4387 4389 4390 4391 4392 4393 4394 4395 4396 4397 4398 4399)
32#pragma warning (error: 4400 4401 4402 4403 4404 4405 4406 4407 4408 4409 4410 4411 4413 4414 4415 4416 4417 4418 4419 4420 4423 4424 4425 4426 4427 4429 4430 4431 4434 4436 4438 4439 4440 4441 4442 4443 4445 4446 4447 4448 4449 4450 4451 4452 4453 4454 4455 4460 4461 4462 4464 4465 4466 4467 4468 4469 4470 4473 4474 4475 4476 4477 4478 4480 4482 4483 4484 4485 4486 4487 4488 4489 4490 4491 4492 4493 4494 4495 4496 4497 4498 4499)
33#pragma warning (error: 4502 4503 4505 4506 4508 4509 4511 4512 4513 4514 4515 4516 4517 4518 4519 4521 4522 4523 4526 4530 4531 4532 4533 4534 4535 4536 4537 4538 4540 4541 4542 4543 4544 4545 4546 4550 4551 4552 4553 4554 4556 4557 4558 4559 4561 4562 4564 4565 4566 4568 4569 4570 4572 4573 4575 4576 4578 4580 4581 4584 4585 4586 4587 4588 4589 4591 4593 4594 4595 4596 4597 4598 )
34#pragma warning (error: 4600 4602 4603 4604 4606 4609 4610 4611 4612 4613 4615 4616 4618 4620 4621 4622 4623 4624 4625 4626 4627 4628 4629 4630 4631 4632 4633 4634 4635 4636 4637 4638 4639 4640 4641 4642 4644 4645 4646 4648 4649 4650 4652 4653 4654 4655 4656 4657 4658 4659 4661 4662 4667 4669 4670 4671 4672 4673 4674 4676 4677 4678 4679 4680 4681 4682 4683 4684 4685 4686 4687 4688 4689 4690 4691 4693 4694 4695 4696 4698 )
35#pragma warning (error: 4700 4702 4703 4706 4709 4710 4711 4714 4715 4716 4717 4718 4719 4720 4721 4722 4723 4724 4725 4726 4727 4728 4729 4731 4732 4733 4734 4739 4740 4741 4742 4743 4744 4745 4747 4749 4750 4751 4752 4753 4754 4755 4756 4757 4761 4764 4771 4772 4775 4776 4777 4778 4786 4788 4789 4792 4793 4794 4798 4799)
36#pragma warning (error: 4800 4801 4803 4804 4805 4806 4807 4808 4809 4810 4811 4812 4813 4815 4816 4817 4821 4822 4823 4827 4829 4834 4835 4839 4840 4841 4842 4843 4844 4845 4846 4847 4848 4849 4855 4867 4869 4872 4880 4881 4882 4883 )
37#pragma warning (error: 4900 4905 4906 4910 4912 4913 4916 4917 4918 4920 4921 4925 4926 4927 4928 4929 4930 4931 4932 4934 4935 4936 4937 4938 4939 4944 4945 4946 4947 4948 4949 4950 4951 4952 4953 4954 4955 4956 4957 4958 4959 4960 4961 4963 4964 4965 4966 4970 4971 4972 4973 4974 4981 4985 4989 4990 4991 4992 4995 4997 4998 4999)
38#pragma warning (error: 5038 )
39
40//
41// Skipped warnings, which are not disabled below. Most are disabled by default. Might be useful to look through, re-enable some and fix the code.
42// NOTE: We don't use #pragma warning (default: ####) on these warnings because default enables warnings that default to disabled.
43//
44
45// 4005 - 'identifier' : macro redefinition https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4005
46// 4061 - enumerator 'identifier' in switch of enum 'enumeration' is not explicitly handled by a case label https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4061
47// 4062 - enumerator 'identifier' in switch of enum 'enumeration' is not handled https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4062
48
49// 4165 - 'HRESULT' is being converted to 'bool'; are you sure this is what you want? https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4165
50
51// 4242 - 'identifier' : conversion from 'type1' to 'type2', possible loss of data https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4242
52// 4254 - 'operator' : conversion from 'type1' to 'type2', possible loss of data https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4254
53// 4265 - 'class' : class has virtual functions, but destructor is not virtual https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4265
54// 4266 - 'function' : no override available for virtual member function from base 'type'; function is hidden https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4266
55// 4296 - 'operator' : expression is always false https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4296
56
57// 4305 - 'identifier' : truncation from 'type1' to 'type2' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4305
58// 4307 - '' : integral constant overflow https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4307
59// 4311 - 'variable' : pointer truncation from 'type' to 'type' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4311
60// 4312 - 'operation' : conversion from 'type1' to 'type2' of greater size https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4312
61// 4339 - 'type' : use of undefined type detected in CLR meta-data - use of this type may lead to a runtime exception https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4339
62// 4342 - behavior change: 'function' called, but a member operator was called in previous versions https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4342
63// 4345 - behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized http://msdn.microsoft.com/en-us/library/wewb47ee.aspx
64// 4350 - behavior change: 'member1' called instead of 'member2' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4350
65// 4365 - 'action' : conversion from 'type_1' to 'type_2', signed/unsigned mismatch https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4365
66// 4370 - layout of class has changed from a previous version of the compiler due to better packing https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4200-through-c4399
67// 4371 - layout of class may have changed from a previous version of the compiler due to better packing of member https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c4371
68// 4373 - 'function': virtual function overrides 'base_function', previous versions of the compiler did not override when parameters only differed by const/volatile qualifiers https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4373
69// 4388 - '==' : signed/unsigned mismatch https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4200-through-c4399
70// 4412 - 'function': function signature contains type 'type'; C++ objects are unsafe to pass between pure code and mixed or native https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4412
71// 4435 - 'class1' : Object layout under /vd2 will change due to virtual base 'class2' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4435
72// 4437 - dynamic_cast from virtual base 'class1' to 'class2' could fail in some contexts https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4437
73// 4444 - 'identifier': top level '__unaligned' is not implemented in this context https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
74
75// NOTE: Shadow variable declaration warnings. These should eventually be fixed up and reenabled.
76// 4456 - declaration of 'identifier' hides previous local declaration https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4456
77// 4457 - declaration of 'identifier' hides function parameter https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4457
78// 4458 - declaration of 'identifier' hides class member https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4458
79// 4459 - declaration of 'identifier' hides global declaration https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4459
80
81// 4463 - overflow; assigning value to bit-field that can only hold values from low_value to high_value https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4463
82// 4471 - a forward declaration of an unscoped enumeration must have an underlying type (int assumed) https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4471
83// 4472 - 'identifier' is a native enum: add an access specifier (private/public) to declare a 'WinRT|managed' enum https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
84// 4481 - nonstandard extension used: override specifier 'keyword' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4481
85
86// 4510 - 'class' : default constructor could not be generated https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4510
87// 4547 - 'operator' : operator before comma has no effect; expected operator with side-effect https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4547
88// 4548 - expression before comma has no effect; expected expression with side-effect https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4548
89// 4549 - 'operator' : operator before comma has no effect; did you intend 'operator'? https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4549
90// 4555 - expression has no effect; expected expression with side-effect https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4555
91// 4571 - Informational: catch(...) semantics changed since Visual C++ 7.1; structured exceptions (SEH) are no longer caught https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4571
92// 4574 - 'Identifier' is defined to be '0': did you mean to use '#if identifier'? https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
93// 4577 - 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
94
95// 4608 - 'union_member' has already been initialized by another union member in the initializer list, 'union_member' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4608
96// 4619 - #pragma warning : there is no warning number 'number' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4619
97// 4643 - Forward declaring 'identifier' in namespace std is not permitted by the C++ Standard. https://docs.microsoft.com/en-us/cpp/cpp-conformance-improvements-2017
98// 4647 - behavior change: __is_pod(type) has different value in previous versions https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4600-through-c4799
99// 4651 - 'definition' specified for precompiled header but not for current compile https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4651
100// 4668 - 'symbol' is not defined as a preprocessor macro, replacing with '0' for 'directives' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4668
101// 4692 - 'function': signature of non-private member contains assembly private native type 'native_type' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4692
102
103// 4701 - Potentially uninitialized local variable 'name' used https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4701
104// 4730 - 'main' : mixing _m64 and floating point expressions may result in incorrect code https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4730
105// 4738 - storing 32-bit float result in memory, possible loss of performance https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4738
106// 4767 - section name '%s' is longer than 8 characters and will be truncated by the linker https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4600-through-c4799
107// 4770 - partially validated enum 'name' used as index https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4600-through-c4799
108// 4774 - 'string' : format string expected in argument number is not a string literal https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4600-through-c4799
109
110// 4819 - The file contains a character that cannot be represented in the current code page (number). Save the file in Unicode format to prevent data loss. https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4819
111// 4820 - 'bytes' bytes padding added after construct 'member_name' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4820
112// 4826 - Conversion from 'type1' to 'type2' is sign-extended. This may cause unexpected runtime behavior. https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4800-through-c4999
113// 4828 - The file contains a character starting at offset ... that is illegal in the current source character set (codepage ...). https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4800-through-c4999
114// 4837 - trigraph detected: '??character' replaced by 'character' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4800-through-c4999
115// 4868 - file(line_number)' compiler may not enforce left-to-right evaluation order in braced initializer list https://msdn.microsoft.com/en-us/library/mt656772.aspx
116
117// 4962 - 'function' : Profile-guided optimizations disabled because optimizations caused profile data to become inconsistent https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4962
118// 4986 - 'function': exception specification does not match previous declaration https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4986
119// 4987 - nonstandard extension used: 'throw (...)' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4800-through-c4999
120// 4988 - 'variable': variable declared outside class/function scope https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4800-through-c4999
121// 4996 - The compiler encountered a deprecated declaration. https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4996
122
123// 5045 - Compiler will insert Spectre mitigation for memory load if /Qspectre switch specified https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c5045
124
125//
126// Disabled warnings
127//
128
129#pragma warning(disable: 4063) // case 'val' is not a valid value for switch of enum 'E'
130
131// @todo HoloLens: Disabled because DbgHelp.h has some anonymous typedefs in it (not allowed in Visual Studio 2015). We should probably just wrap that header.
132#pragma warning(disable: 4091) // 'keyword' : ignored on left of 'type' when no variable is declared https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4091
133
134// Unwanted VC++ level 4 warnings to disable.
135#pragma warning(disable: 4100) // 'identifier' : unreferenced formal parameter https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4100
136#pragma warning(disable: 4121) // 'symbol' : alignment of a member was sensitive to packing https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4121
137#pragma warning(disable: 4127) // Conditional expression is constant https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4127
138#pragma warning(disable: 4180) // qualifier applied to function type has no meaning; ignored https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4180
139#pragma warning(disable: 4189) // 'identifier': local variable is initialized but not referenced https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4000-through-c4199
140
141#pragma warning(disable: 4200) // Zero-length array item at end of structure, a VC-specific extension https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-levels-2-and-4-c4200
142#pragma warning(disable: 4201) // nonstandard extension used : nameless struct/union https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4201
143#pragma warning(disable: 4217) // 'operator' : member template functions cannot be used for copy-assignment or copy-construction // No docs
144#pragma warning(disable: 4245) // 'initializing': conversion from 'type' to 'type', signed/unsigned mismatch https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4245
145#pragma warning(disable: 4251) // 'type' needs to have dll-interface to be used by clients of 'type' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4251
146#pragma warning(disable: 4267) // 'var' : conversion from 'size_t' to 'type', possible loss of data https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4267
147#pragma warning(disable: 4275) // non - DLL-interface classkey 'identifier' used as base for DLL-interface classkey 'identifier' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4275
148#pragma warning(disable: 4291) // typedef-name '' used as synonym for class-name '' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4291
149
150#pragma warning(disable: 4307) // '': integral constant overflow https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-2-c4307
151#pragma warning(disable: 4315) // 'classname': 'this' pointer for member 'member' may not be aligned 'alignment' as expected by the constructor https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4200-through-c4399
152#pragma warning(disable: 4316) // 'identifier': object allocated on the heap may not be aligned 'alignment' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4200-through-c4399
153#pragma warning(disable: 4324) // structure was padded due to __declspec(align()) https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4324
154#pragma warning(disable: 4347) // behavior change: 'function template' is called instead of 'function https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4200-through-c4399
155#pragma warning(disable: 4351) // new behavior: elements of array 'array' will be default initialized https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4200-through-c4399
156#pragma warning(disable: 4355) // this used in base initializer list https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4355
157#pragma warning(disable: 4366) // The result of the unary 'operator' operator may be unaligned https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4366
158#pragma warning(disable: 4373) // '%$S': virtual function overrides '%$pS', previous versions of the compiler did not override when parameters only differed by const/volatile qualifiers https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4373
159#pragma warning(disable: 4389) // signed/unsigned mismatch https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4355
160
161#pragma warning(disable: 4464) // relative include path contains '..' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c4464
162#pragma warning(disable: 4482) // nonstandard extension used: enum 'enumeration' used in qualified name https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
163
164#pragma warning(disable: 4505) // 'function' : unreferenced local function has been removed https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4505
165#pragma warning(disable: 4511) // 'class' : copy constructor could not be generated https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4511
166#pragma warning(disable: 4512) // 'class' : assignment operator could not be generated https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4512
167#pragma warning(disable: 4514) // 'function' : unreferenced inline function has been removed https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4514
168
169#pragma warning(disable: 4592) // 'function': 'constexpr' call evaluation failed; function will be called at run-time https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
170#pragma warning(disable: 4599) // 'flag path': command line argument number number does not match precompiled header https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4400-through-c4599
171
172#pragma warning(disable: 4605) // '/Dmacro' specified on current command line, but was not specified when precompiled header was built https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4600-through-c4799
173#pragma warning(disable: 4623) // 'derived class' : default constructor was implicitly defined as deleted because a base class default constructor is inaccessible or deleted https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4623
174#pragma warning(disable: 4625) // 'derived class' : copy constructor was implicitly defined as deleted because a base class copy constructor is inaccessible or deleted https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4625
175#pragma warning(disable: 4626) // 'derived class' : assignment operator was implicitly defined as deleted because a base class assignment operator is inaccessible or deleted https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4626
176#pragma warning(disable: 4640) // 'instance' : construction of local static object is not thread-safe https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4640
177#pragma warning(disable: 4699) // creating precompiled header // No docs
178
179#pragma warning(disable: 4710) // 'function' : function not inlined https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4710
180#pragma warning(disable: 4711) // function selected for automatic inlining https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4711
181#pragma warning(disable: 4714) // function 'function' marked as __forceinline not inlined https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4714
182#pragma warning(disable: 4748) // /GS can not protect parameters and local variables from local buffer overrun because optimizations are disabled in function // No docs
183#pragma warning(disable: 4768) // __declspec attributes before linkage specification are ignored https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4600-through-c4799
184// NOTE: _mm_cvtpu8_ps will generate this falsely if it doesn't get inlined
185#pragma warning(disable: 4799) // Warning: function 'ident' has no EMMS instruction https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4799
186
187// NOTE: https://answers.unrealengine.com/questions/701635/warning-c4828.html
188#pragma warning(disable: 4828) // The file contains a character starting at offset ... that is illegal in the current source character set(codepage ...). // No docs
189#pragma warning(disable: 4868) // 'file(line_number)' compiler may not enforce left-to-right evaluation order in braced initializer list https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4868
190
191// NOTE: ocid.h breaks this
192#pragma warning(disable: 4917) // 'declarator' : a GUID can only be associated with a class, interface or namespace https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4917
193
194//
195// All of the /Wall warnings that we are able to enable
196// @todo: https://docs.microsoft.com/en-us/cpp/preprocessor/compiler-warnings-that-are-off-by-default
197// NOTE: This is currently just overriding the error versions above, removing these will cause them to be errors!
198//
199
200#pragma warning(default: 4191) // 'operator/operation': unsafe conversion from 'type_of_expression' to 'type_required' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warnings-c4000-through-c4199
201
202#pragma warning(default: 4255) // 'function' : no function prototype given: converting '()' to '(void)' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4255
203#pragma warning(default: 4263) // 'function' : member function does not override any base class virtual member function https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4263
204#pragma warning(default: 4264) // 'virtual_function' : no override available for virtual member function from base 'class'; function is hidden https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4264
205#pragma warning(3: 4265) // 'class' : class has virtual functions, but destructor is not virtual https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4265
206#pragma warning(default: 4287) // 'operator' : unsigned/negative constant mismatch https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4264
207#pragma warning(default: 4289) // nonstandard extension used : 'var' : loop control variable declared in the for-loop is used outside the for-loop scope https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4289
208
209//#pragma warning(disable : 4339) // 'type' : use of undefined type detected in CLR meta-data - use of this type may lead to a runtime exception
210#pragma warning(disable: 4345) // behavior change: an object of POD type constructed with an initializer of the form () will be default-initialized
211
212#pragma warning(disable: 4514) // unreferenced inline/local function has been removed
213#pragma warning(default: 4529) // 'member_name' : forming a pointer-to-member requires explicit use of the address-of operator ('&') and a qualified name // No docs
214#pragma warning(default: 4536) // 'type name' : type-name exceeds meta-data limit of 'limit' characters https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4536
215#pragma warning(default: 4545) // expression before comma evaluates to a function which is missing an argument list https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4545
216#pragma warning(default: 4546) // function call before comma missing argument list https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4546
217#pragma warning(default: 4557) // '__assume' contains effect 'effect' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4557
218#pragma warning(disable: 4577) // 'noexcept' used with no exception handling mode specified; termination on exception is not guaranteed. Specify /EHsc
219
220#pragma warning(default: 4628) // digraphs not supported with -Ze. Character sequence 'digraph' not interpreted as alternate token for 'char' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4289
221#pragma warning(default: 4682) // 'parameter' : no directional parameter attribute specified, defaulting to [in] https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4682
222#pragma warning(default: 4686) // 'user-defined type' : possible change in behavior, change in UDT return calling convention https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-3-c4686
223
224#pragma warning(disable: 4710) // 'function' : function not inlined / The given function was selected for inline expansion, but the compiler did not perform the inlining.
225#pragma warning(disable: 4746) // volatile access of '<expression>' is subject to /volatile https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-c4746?view=msvc-170
226#pragma warning(default: 4786) // 'identifier' : identifier was truncated to 'number' characters in the debug information // No docs
227#pragma warning(default: 4793) // 'function' : function is compiled as native code: 'reason' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-and-3-c4793
228
229#pragma warning(default: 4905) // wide string literal cast to 'LPSTR' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4905
230#pragma warning(default: 4906) // string literal cast to 'LPWSTR' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4906
231#pragma warning(default: 4928) // illegal copy-initialization; more than one user-defined conversion has been implicitly applied https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4928
232#pragma warning(default: 4931) // we are assuming the type library was built for number-bit pointers https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4931
233#pragma warning(disable: 4946) // reinterpret_cast used between related classes: 'class1' and 'class2' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4946
234#pragma warning(default: 5038) // data member 'A::y' will be initialized after data member 'A::x' https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/c5038
235#pragma warning(disable: 4984) // 'if constexpr' is a C++17 language extension
236#pragma warning(disable : 5105) // macro expansion producing 'defined' has undefined behavior
237
238// #pragma warning(default: 4996) // Deprecation: controlled via command line
239
240// interesting ones to turn on and off at times
241//#pragma warning(disable : 4266) // '' : no override available for virtual member function from base ''; function is hidden
242//#pragma warning(disable : 4296) // 'operator' : expression is always true / false
243//#pragma warning(disable : 4820) // 'bytes' bytes padding added after member 'member'
244// Mixing MMX/SSE intrinsics will cause this warning, even when it's done correctly.
245//#pragma warning(disable : 4730) //mixing _m64 and floating point expressions may result in incorrect code
246
247// Make sure characters are signed
248#ifdef _CHAR_UNSIGNED
249#error "Bad VC++ option: Characters must be signed" //lint !e309 suppress as lint doesn't have this defined
250#endif
251
252
StaticCastSharedRef
UE_FORCEINLINE_HINT TSharedRef< CastToType, Mode > StaticCastSharedRef(TSharedRef< CastFromType, Mode > const &InSharedRef)
Definition SharedPointer.h:127