incomplete type for std::unordered_set compiling error in g++5, compiles in clang++
c++,c++11,clang,incomplete-type,gcc5
It is undefined behavior to instantiate a standard library container with an incomplete type. [res.on.functions]/1, 2.5: 1 In certain cases (replacement functions, handler functions, operations on types used to instantiate standard library template components), the C++ standard library depends on components supplied by a C++ program. If these components do...
What is the main differences between void and other incomplete types in C++?
c++,types,void,incomplete-type
There is indeed a very subtle difference between void and another incomplete type: You can't have a reference to a void type: struct T; // incompletely defined type // incompletely defined types and void are incomplete types T* x=nullptr; // pointer to incomplete type are valid, same for void pointers...
C: Allowed to assign any array to pointer to array of incomplete type
c,arrays,ansi,language-lawyer,incomplete-type
The initialization in char (*Durr)[] = &Arr; requires Durr pointing to an array of type compatible with the type of Arr. According to "6.7.6.2 Array declarators" (n1570) 6 For two array types to be compatible, both shall have compatible element types, and if both size specifiers are present, and are...
Using enum inside header in c
c,struct,enums,header,incomplete-type
The problem is, that you're using a enum that's not yet known to the compiler, due to the order of your code. An include literally just copies the contents of the header file into the .c file. So in your case you have your struct definition with these two enums...
Incomplete type not allowed
Define the typedef 'Node' first, so that it will be available for the next structure definition. However, now within the struct 'node', the 'next' and 'prev' elements cannot be of type 'Node' due to it being defined only after finishing the typedef. Nevertheless, 'struct node *' may be used to...
C++ Pimpl Idiom Imcomplete Type using std::unique_ptr
c++,c++11,unique-ptr,pimpl-idiom,incomplete-type
You can't use defaulted constructors and assignment operators (such as SomeInt( SomeInt&& other ) = default;) declared in header file with Pimpl classes, because the default implementations are inline, and at the point of declaration SomeInt's declaration SomeInt::impl is incomplete, so unique_ptr complains. You have to declare and define out...
How to fix an Incompatible pointer for subclass of UICollectionViewCell
ios,objective-c,uicollectionviewcell,incomplete-type
You just need to add a cast to let the compiler know what you are doing - - (void)collectionView:(UICollectionView *)collectionView didHighlightItemAtIndexPath:(NSIndexPath *)indexPath;{ SPCell *cell = (SPCell *)[self.collectionView cellForItemAtIndexPath:indexPath]; cell.thumbnail.alpha=0.6; } ...
C++ member access into incomplete type although header is included
c++,declaration,member,forward,incomplete-type
You defined a type Torse, but clang complains about a type named torse. Fix your case....