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‎docs/error-messages/compiler-errors-1/compiler-error-c2014.md‎

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---
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title: "Compiler Error C2014"
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description: "Learn more about: Compiler Error C2014"
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ms.date: 11/04/2016
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ms.date: 08/25/2025
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f1_keywords: ["C2014"]
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helpviewer_keywords: ["C2014"]
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---
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## Remarks
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The `#` sign of a preprocessor directive must be the first character on a line that is not white space.
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The `#` sign of a [preprocessor directive](../../preprocessor/preprocessor-directives.md) must be the first character on a line that is not white space. Ensure that the previous line doesn't contain a trailing escape.
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## Example
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The following example generates C2014:
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```cpp
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// C2014.cpp
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int k; #include <stdio.h> // C2014
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```
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// compile with: /c
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Possible resolution:
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int a; #define A // C2014
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```cpp
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// C2014b.cpp
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// compile with: /c
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int k;
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#include <stdio.h>
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int b;\
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#define B // C2014
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int c;
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#define C // OK
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```

‎docs/error-messages/compiler-errors-1/compiler-error-c2033.md‎

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---
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title: "Compiler Error C2033"
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description: "Learn more about: Compiler Error C2033"
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ms.date: 11/04/2016
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ms.date: 09/10/2025
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f1_keywords: ["C2033"]
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helpviewer_keywords: ["C2033"]
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---
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# Compiler Error C2033
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> 'identifier' : bit field cannot have indirection
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> '*identifier*': bit field cannot have indirection
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## Remarks
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The bit field was declared as a pointer, which is not allowed.
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Bit fields can't be declared as a pointer, reference, or array. For more information, see [C++ Bit Fields](../../cpp/cpp-bit-fields.md).
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## Example
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The following example generates C2033:
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```cpp
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// C2033.cpp
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struct S {
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int *b : 1; // C2033
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// compile with: /c
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struct S
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{
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int* ptr : 1; // C2033
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int arr[3] : 1; // C2033
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};
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```
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Possible resolution:
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## See also
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```cpp
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// C2033b.cpp
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// compile with: /c
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struct S {
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int b : 1;
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};
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```
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[Compiler Error C2531](../compiler-errors-2/compiler-error-c2531.md)

‎docs/error-messages/compiler-errors-1/compiler-error-c2154.md‎

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---
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title: "Compiler Error C2154"
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description: "Learn more about: Compiler Error C2154"
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ms.date: 11/04/2016
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ms.date: 09/21/2025
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f1_keywords: ["C2154"]
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helpviewer_keywords: ["C2154"]
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---
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# Compiler Error C2154
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> 'type' : only enumeration type is allowed as an argument to compiler intrinsic type trait '__underlying_type'
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> '*type*': only enumeration type is allowed as an argument to compiler intrinsic type trait '__underlying_type'
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## Remarks
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You can only get the underlying type of an enumeration type.
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You can only get the underlying type of an [enumeration](../../cpp/enumerations-cpp.md) type.
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For more information, see [Compiler Support for Type Traits](../../extensions/compiler-support-for-type-traits-cpp-component-extensions.md).
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## Example
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The following example generates C2154:
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```cpp
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// C2154.cpp
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// compile with: /c
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struct S {};
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enum E {};
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enum class EC {};
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__underlying_type(S) s; // C2154
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__underlying_type(int) i; // C2154
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__underlying_type(E) e; // OK
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__underlying_type(EC) ec; // OK
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```
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## See also
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[`underlying_type` class](../../standard-library/underlying-type-class.md)

‎docs/error-messages/compiler-errors-1/compiler-error-c2182.md‎

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---
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title: "Compiler Error C2182"
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description: "Learn more about: Compiler Error C2182"
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ms.date: 11/04/2016
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ms.date: 08/22/2025
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f1_keywords: ["C2182"]
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helpviewer_keywords: ["C2182"]
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---
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# Compiler Error C2182
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> 'identifier' : illegal use of type 'void'
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> '*identifier*': this use of 'void' is not valid
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## Remarks
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A variable is declared type **`void`**.
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You can't create a variable or array of type **`void`**. Only pointers to **`void`** are allowed.
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## Example
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```cpp
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// C2182.cpp
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// compile with: /c
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int main() {
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int i = 10;
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void &ir = i; // C2182 cannot have a reference to type void
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int &ir = i; // OK
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}
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void var; // C2182
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void arr[5]; // C2182
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void* ptr; // OK
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```

‎docs/error-messages/compiler-errors-1/compiler-error-c2290.md‎

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---
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title: "Compiler Error C2290"
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description: "Learn more about: Compiler Error C2290"
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ms.date: 11/04/2016
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ms.date: 12/5/2025
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f1_keywords: ["C2290"]
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helpviewer_keywords: ["C2290"]
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---
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# Compiler Error C2290
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> C++ asm syntax ignored. Use __asm.
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> C++ 'asm' syntax ignored. Use __asm.
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## Remarks
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The **`asm`** syntax is reserved for future use.
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The **`asm`** syntax is reserved for future use. Try [`__asm`](../../assembler/inline/asm.md) instead. For more information, see [Inline Assembler](../../assembler/inline/inline-assembler.md).
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## Example
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The following example generates C2290:
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```cpp
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// C2290.cpp
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// Compile for 32 bit, i.e. x86 instead of x64
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int main()
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{
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asm("nop"); // C2290
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__asm { nop } // OK
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}
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```

‎docs/error-messages/compiler-errors-1/compiler-errors-c2100-through-c2199.md‎

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---
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title: "Compiler errors C2100 through C2199"
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description: "Learn more about: Compiler errors C2100 through C2199"
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ms.date: "04/21/2019"
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ms.date: 04/21/2019
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f1_keywords: ["C2119", "C2123", "C2125", "C2126", "C2127", "C2136", "C2176", "C2187", "C2189"]
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helpviewer_keywords: ["C2119", "C2123", "C2125", "C2126", "C2127", "C2136", "C2176", "C2187", "C2189"]
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|[Compiler error C2151](compiler-error-c2151.md)|more than one language attribute|
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|[Compiler error C2152](compiler-error-c2152.md)|'*identifier*': pointers to functions with different attributes|
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|[Compiler error C2153](compiler-error-c2153.md)|integer literals must have at least one digit|
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|[Compiler error C2154](compiler-error-c2154.md)|'*type*': only enumeration type is allowed as an argument to compiler intrinsic type trait '*trait*'|
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|[Compiler error C2154](compiler-error-c2154.md)|'*type*': only enumeration type is allowed as an argument to compiler intrinsic type trait '__underlying_type'|
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|[Compiler error C2155](compiler-error-c2155.md)|'?': invalid left operand, expected arithmetic or pointer type|
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|[Compiler error C2156](compiler-error-c2156.md)|pragma must be outside function|
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|[Compiler error C2157](compiler-error-c2157.md)|'*identifier*': must be declared before use in pragma list|
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|[Compiler error C2179](compiler-error-c2179.md)|'*type*': an attribute argument cannot use type parameters|
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|[Compiler error C2180](compiler-error-c2180.md)|controlling expression has type '*type*'|
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|[Compiler error C2181](compiler-error-c2181.md)|illegal else without matching if|
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|[Compiler error C2182](compiler-error-c2182.md)|'*identifier*': illegal use of type 'void'|
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|[Compiler error C2182](compiler-error-c2182.md)|'*identifier*': this use of 'void' is not valid|
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|[Compiler error C2183](compiler-error-c2183.md)|syntax error: translation unit is empty|
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|[Compiler error C2184](compiler-error-c2184.md)|'*type*': illegal type for __except expression|
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|[Compiler error C2185](compiler-error-c2185.md)|'*identifier*': illegal based allocation|

‎docs/error-messages/compiler-warnings/compiler-warning-c5072.md‎

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---
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title: "Compiler Warning (level 1) C5072"
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description: "Learn more about: Compiler Warning (level 1) C5072"
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ms.date: 02/09/2024
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ms.date: 09/10/2025
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f1_keywords: ["C5072"]
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helpviewer_keywords: ["C5072"]
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## Example
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The following command line generates warning `C5072`:
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The following command line generates warning C5072:
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```cpp
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cl /fsanitize=address /EHsc test.cpp
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```cmd
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cl /fsanitize=address /EHsc test.cpp
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```
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To fix it, have the compiler generate debug information by using a switch like [`/Zi`](../../build/reference/z7-zi-zi-debug-information-format.md#zi) or [`/Z7`](../../build/reference/z7-zi-zi-debug-information-format.md#z7), like this: `cl /fsanitize=address /EHsc /Zi test.cpp`
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To fix it, have the compiler generate debug information by using a switch like [`/Zi`](../../build/reference/z7-zi-zi-debug-information-format.md#zi) or [`/Z7`](../../build/reference/z7-zi-zi-debug-information-format.md#z7), like this:
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```cmd
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cl /fsanitize=address /EHsc /Zi test.cpp
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```
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## See also
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