Messages emitted by a compiler which indicate potential problems in code or configuration.
50
votes
7answers
11k views
Custom Compiler Warnings
When using the ObsoleteAtribute in .Net it gives you compiler warnings telling you that the object/method/property is obsolete and somthing else should be used. I'm currently working on a project that ...
8
votes
4answers
8k views
What are the valid characters for macro names?
Are C-style macro names subject to the same naming rules as identifiers? After a compiler upgrade, it is now emitting this warning for a legacy application:
warning #3649-D: white space is required ...
60
votes
3answers
30k views
What is the list of valid @SuppressWarnings warning names in Java?
What is the list of valid @SuppressWarnings warning names in Java?
The bit that come between the ("") in @SuppressWarnings("").
27
votes
6answers
4k views
How to intentionally cause a custom java compiler warning message?
I'm about to commit an ugly temporary hack in order to work around a blocking issue while we wait for an external resource to be fixed. Aside from marking it with a big scary comment and a bunch of ...
7
votes
2answers
848 views
Can I make GCC warn on passing too-wide types to functions?
Following is some obviously-defective code for which I think the compiler should emit a diagnostic. But neither gcc nor g++ does, even with all the warnings options I could think of: -pedantic -Wall ...
36
votes
3answers
1k views
Does there exist a static_warning?
I'm aware of this question which mentions Boost's "STATIC WARNING", but I'd like to ask again, specifically, how I could implement a static_warning which operates similarly to static_assert but only ...
23
votes
6answers
22k views
How can I hide “defined but not used” warnings in GCC?
I have a bunch of compile time asserts, such as:
CASSERT(isTrue) or CASSERT2(isTrue, prefix_)
When compiling with GCC I get many warnings like 'prefix_LineNumber' defined but not used. Is there a ...
9
votes
4answers
5k views
Is using #pragma warning push/pop the right way to temporarily alter warning level?
Once in a while it's difficult to write C++ code that wouldn't emit warnings at all. Having warnings enabled is however a good idea. So it is often necessary to disable warnings around some specific ...
9
votes
5answers
13k views
How to suppress Java compiler warnings for specific functions
We are always taught to make sure we use a break in switch statements to avoid fall-through.
The Java compiler warns about these situations to help us not make trivial (but drastic) errors.
I have, ...
8
votes
6answers
3k views
Why “not all control paths return a value” is warning and not an error?
I was trying to answer this question. As suggested by the accepted answer, the problem with that code is that not all control paths are returning a value. I tried this code on the VC9 compiler and it ...
26
votes
2answers
5k views
Ignore all warnings in a specific file using LLVM/Clang
There are some files in my iOS project that have some warnings, and I want to ignore those warnings. I don't want to disable warnings in the entire project (know how to do that), just some specific ...
18
votes
6answers
1k views
Initialise string function result?
I've just been debugging a problem with a function that returns a string that has got me worried. I've always assumed that the implicit Result variable for functions that return a string would be ...
12
votes
2answers
931 views
Will a “variableName;” C++ statement be a no-op at all times?
In C++ sometimes a variable will be defined, but not used. Here's an example - a function for use with COM_INTERFACE_ENTRY_FUNC_BLIND ATL macro:
HRESULT WINAPI blindQuery( void* /*currentObject*/, ...
7
votes
2answers
4k views
Suppressing line specific XCode compiler warnings
Similar to Ben Gottlieb's question, I have a handful of deprecated calls that are bugging me. Is there a way to suppress warnings by line? For instance:
if([[UIApplication sharedApplication]
...
18
votes
5answers
34k views
Java Class.cast() vs. cast operator
Having being taught during my C++ days about evils of the C-style cast operator I was pleased at first to find that in Java 5 java.lang.Class had acquired cast method.
I thought that finally we have ...
