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Since C++11 the standard mandates the _Pragma operator which is intended for use inside macros. With this you can improve the situation by wrapping all this compiler switching into a central macro...
Answer
#4: Post edited
by
Someone
·
2021-01-22T20:06:10Z (almost 4 years ago)
Simplified code, using Lundin's comment; added limitations
- Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
- With this you can improve the situation by wrapping all this compiler switching into a central macro definition (**MSVC is untested!**):
- ```
- // see https://stackoverflow.com/a/45783809
- #define DO_PRAGMA_(x) _Pragma (#x)
- #define DO_PRAGMA(x) DO_PRAGMA_(x)
#if defined(_MSC_VER)#define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) # untested!#elif defined(__clang__)#define PUSH_WARNING_STATE DO_PRAGMA(clang diagnostic push)#elif defined(__GNUC__)#define PUSH_WARNING_STATE DO_PRAGMA(GCC diagnostic push)#endif#if defined(_MSC_VER)#define POP_WARNING_STATE DO_PRAGMA(warnings(poph)) # untested!#elif defined(__clang__)#define POP_WARNING_STATE DO_PRAGMA(clang diagnostic pop)#elif defined(__GNUC__)#define POP_WARNING_STATE DO_PRAGMA(GCC diagnostic pop)#endif#if defined(_MSC_VER)#define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC)#elif defined(__clang__)#define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG)#elif defined(__GNUC__)#define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)#endif- ```
- Which can be used like:
- ```
- // find some custom central naming for your warnings
- #define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
- #define WARN_UNINITIALIZED_GCC "-Wuninitialized"
- int main(int argc, char **argv) {
- float a = 0, b;
- PUSH_WARNING_STATE
- DISABLE_WARNING(WARN_UNINITIALIZED);
- if(a != b) {
- POP_WARNING_STATE
- return a == b;
- }
- }
- ```
- Compiling gives only the second error, as intended:
- ```
- $ g++ -Wall -pedantic test.cpp
- test.cpp: In function 'int main(int, char**)':
- test.cpp:39:12: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
- 39 | return a == b;
- | ~~^~~~
```
- Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
- With this you can improve the situation by wrapping all this compiler switching into a central macro definition (**MSVC is untested!**):
- ```
- // see https://stackoverflow.com/a/45783809
- #define DO_PRAGMA_(x) _Pragma (#x)
- #define DO_PRAGMA(x) DO_PRAGMA_(x)
- #define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) \
- DO_PRAGMA(clang diagnostic push) \
- DO_PRAGMA(GCC diagnostic push)
- #define POP_WARNING_STATE DO_PRAGMA(warnings(pop)) \
- DO_PRAGMA(clang diagnostic pop) \
- DO_PRAGMA(GCC diagnostic pop)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC) ) \
- DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG) \
- DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)
- ```
- Which can be used like:
- ```
- // find some custom central naming for your warnings
- #define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
- #define WARN_UNINITIALIZED_GCC "-Wuninitialized"
- int main(int argc, char **argv) {
- float a = 0, b;
- PUSH_WARNING_STATE
- DISABLE_WARNING(WARN_UNINITIALIZED);
- if(a != b) {
- POP_WARNING_STATE
- return a == b;
- }
- }
- ```
- Compiling gives only the second error, as intended:
- ```
- $ g++ -Wall -pedantic test.cpp
- test.cpp: In function 'int main(int, char**)':
- test.cpp:39:12: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
- 39 | return a == b;
- | ~~^~~~
- ```
- Limitations:
- - problem with warnings that can only be disabled on some platforms (-> pragma might trigger a warning)
#3: Post edited
by
Someone
·
2021-01-21T13:03:52Z (almost 4 years ago)
- Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
With this you can improve the situation by wrapping all this compiler switching into a central macro definition:- ```
- // see https://stackoverflow.com/a/45783809
- #define DO_PRAGMA_(x) _Pragma (#x)
- #define DO_PRAGMA(x) DO_PRAGMA_(x)
- #if defined(_MSC_VER)
- #define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) # untested!
- #elif defined(__clang__)
- #define PUSH_WARNING_STATE DO_PRAGMA(clang diagnostic push)
- #elif defined(__GNUC__)
- #define PUSH_WARNING_STATE DO_PRAGMA(GCC diagnostic push)
- #endif
- #if defined(_MSC_VER)
- #define POP_WARNING_STATE DO_PRAGMA(warnings(poph)) # untested!
- #elif defined(__clang__)
- #define POP_WARNING_STATE DO_PRAGMA(clang diagnostic pop)
- #elif defined(__GNUC__)
- #define POP_WARNING_STATE DO_PRAGMA(GCC diagnostic pop)
- #endif
- #if defined(_MSC_VER)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC)
- #elif defined(__clang__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG)
- #elif defined(__GNUC__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)
- #endif
- ```
- Which can be used like:
- ```
- // find some custom central naming for your warnings
- #define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
- #define WARN_UNINITIALIZED_GCC "-Wuninitialized"
- int main(int argc, char **argv) {
- float a = 0, b;
- PUSH_WARNING_STATE
- DISABLE_WARNING(WARN_UNINITIALIZED);
- if(a != b) {
- POP_WARNING_STATE
- return a == b;
- }
- }
- ```
- Compiling gives only the second error, as intended:
- ```
- $ g++ -Wall -pedantic test.cpp
- test.cpp: In function 'int main(int, char**)':
- test.cpp:39:12: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
- 39 | return a == b;
- | ~~^~~~
- ```
- Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
- With this you can improve the situation by wrapping all this compiler switching into a central macro definition (**MSVC is untested!**):
- ```
- // see https://stackoverflow.com/a/45783809
- #define DO_PRAGMA_(x) _Pragma (#x)
- #define DO_PRAGMA(x) DO_PRAGMA_(x)
- #if defined(_MSC_VER)
- #define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) # untested!
- #elif defined(__clang__)
- #define PUSH_WARNING_STATE DO_PRAGMA(clang diagnostic push)
- #elif defined(__GNUC__)
- #define PUSH_WARNING_STATE DO_PRAGMA(GCC diagnostic push)
- #endif
- #if defined(_MSC_VER)
- #define POP_WARNING_STATE DO_PRAGMA(warnings(poph)) # untested!
- #elif defined(__clang__)
- #define POP_WARNING_STATE DO_PRAGMA(clang diagnostic pop)
- #elif defined(__GNUC__)
- #define POP_WARNING_STATE DO_PRAGMA(GCC diagnostic pop)
- #endif
- #if defined(_MSC_VER)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC)
- #elif defined(__clang__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG)
- #elif defined(__GNUC__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)
- #endif
- ```
- Which can be used like:
- ```
- // find some custom central naming for your warnings
- #define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
- #define WARN_UNINITIALIZED_GCC "-Wuninitialized"
- int main(int argc, char **argv) {
- float a = 0, b;
- PUSH_WARNING_STATE
- DISABLE_WARNING(WARN_UNINITIALIZED);
- if(a != b) {
- POP_WARNING_STATE
- return a == b;
- }
- }
- ```
- Compiling gives only the second error, as intended:
- ```
- $ g++ -Wall -pedantic test.cpp
- test.cpp: In function 'int main(int, char**)':
- test.cpp:39:12: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
- 39 | return a == b;
- | ~~^~~~
- ```
#2: Post edited
by
Someone
·
2021-01-21T13:02:05Z (almost 4 years ago)
Added compiler output
- Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
- With this you can improve the situation by wrapping all this compiler switching into a central macro definition:
- ```
- // see https://stackoverflow.com/a/45783809
- #define DO_PRAGMA_(x) _Pragma (#x)
- #define DO_PRAGMA(x) DO_PRAGMA_(x)
- #if defined(_MSC_VER)
- #define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) # untested!
- #elif defined(__clang__)
- #define PUSH_WARNING_STATE DO_PRAGMA(clang diagnostic push)
- #elif defined(__GNUC__)
- #define PUSH_WARNING_STATE DO_PRAGMA(GCC diagnostic push)
- #endif
- #if defined(_MSC_VER)
- #define POP_WARNING_STATE DO_PRAGMA(warnings(poph)) # untested!
- #elif defined(__clang__)
- #define POP_WARNING_STATE DO_PRAGMA(clang diagnostic pop)
- #elif defined(__GNUC__)
- #define POP_WARNING_STATE DO_PRAGMA(GCC diagnostic pop)
- #endif
- #if defined(_MSC_VER)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC)
- #elif defined(__clang__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG)
- #elif defined(__GNUC__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)
- #endif
- ```
- Which can be used like:
- ```
- // find some custom central naming for your warnings
- #define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
- #define WARN_UNINITIALIZED_GCC "-Wuninitialized"
- int main(int argc, char **argv) {
- float a = 0, b;
- PUSH_WARNING_STATE
- DISABLE_WARNING(WARN_UNINITIALIZED);
- if(a != b) {
- POP_WARNING_STATE
- return a == b;
- }
- }
- ```
- Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
- With this you can improve the situation by wrapping all this compiler switching into a central macro definition:
- ```
- // see https://stackoverflow.com/a/45783809
- #define DO_PRAGMA_(x) _Pragma (#x)
- #define DO_PRAGMA(x) DO_PRAGMA_(x)
- #if defined(_MSC_VER)
- #define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) # untested!
- #elif defined(__clang__)
- #define PUSH_WARNING_STATE DO_PRAGMA(clang diagnostic push)
- #elif defined(__GNUC__)
- #define PUSH_WARNING_STATE DO_PRAGMA(GCC diagnostic push)
- #endif
- #if defined(_MSC_VER)
- #define POP_WARNING_STATE DO_PRAGMA(warnings(poph)) # untested!
- #elif defined(__clang__)
- #define POP_WARNING_STATE DO_PRAGMA(clang diagnostic pop)
- #elif defined(__GNUC__)
- #define POP_WARNING_STATE DO_PRAGMA(GCC diagnostic pop)
- #endif
- #if defined(_MSC_VER)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC)
- #elif defined(__clang__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG)
- #elif defined(__GNUC__)
- #define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)
- #endif
- ```
- Which can be used like:
- ```
- // find some custom central naming for your warnings
- #define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
- #define WARN_UNINITIALIZED_GCC "-Wuninitialized"
- int main(int argc, char **argv) {
- float a = 0, b;
- PUSH_WARNING_STATE
- DISABLE_WARNING(WARN_UNINITIALIZED);
- if(a != b) {
- POP_WARNING_STATE
- return a == b;
- }
- }
- ```
- Compiling gives only the second error, as intended:
- ```
- $ g++ -Wall -pedantic test.cpp
- test.cpp: In function 'int main(int, char**)':
- test.cpp:39:12: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
- 39 | return a == b;
- | ~~^~~~
- ```
#1: Initial revision
by
Someone
·
2021-01-21T13:00:17Z (almost 4 years ago)
Since C++11 the standard mandates the [`_Pragma` operator](https://en.cppreference.com/w/cpp/preprocessor/impl) which is intended for use inside macros.
With this you can improve the situation by wrapping all this compiler switching into a central macro definition:
```
// see https://stackoverflow.com/a/45783809
#define DO_PRAGMA_(x) _Pragma (#x)
#define DO_PRAGMA(x) DO_PRAGMA_(x)
#if defined(_MSC_VER)
#define PUSH_WARNING_STATE DO_PRAGMA(warnings(push)) # untested!
#elif defined(__clang__)
#define PUSH_WARNING_STATE DO_PRAGMA(clang diagnostic push)
#elif defined(__GNUC__)
#define PUSH_WARNING_STATE DO_PRAGMA(GCC diagnostic push)
#endif
#if defined(_MSC_VER)
#define POP_WARNING_STATE DO_PRAGMA(warnings(poph)) # untested!
#elif defined(__clang__)
#define POP_WARNING_STATE DO_PRAGMA(clang diagnostic pop)
#elif defined(__GNUC__)
#define POP_WARNING_STATE DO_PRAGMA(GCC diagnostic pop)
#endif
#if defined(_MSC_VER)
#define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(warnings(disable : WARNING_NAME##_MSC)
#elif defined(__clang__)
#define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(clang diagnostic ignored WARNING_NAME##_CLANG)
#elif defined(__GNUC__)
#define DISABLE_WARNING(WARNING_NAME) DO_PRAGMA(GCC diagnostic ignored WARNING_NAME##_GCC)
#endif
```
Which can be used like:
```
// find some custom central naming for your warnings
#define WARN_UNINITIALIZED_CLANG "-Wuninitialized"
#define WARN_UNINITIALIZED_GCC "-Wuninitialized"
int main(int argc, char **argv) {
float a = 0, b;
PUSH_WARNING_STATE
DISABLE_WARNING(WARN_UNINITIALIZED);
if(a != b) {
POP_WARNING_STATE
return a == b;
}
}
```