First of all, I know this is not the best way to do this, I'm just looking how it should be done. I created a class called bord,which holds a member
std::unique_ptr<std::unique_ptr<char>[] > char_bord; Which should be the correct syntax, then I try to initialize this in the constructor:
bord::bord():char_bord(new std::unique_ptr<char>[10]) { //char_bord=new std::unique_ptr<char>[10]; //This did not seem to work aswell. for(int i=0;i<10;i++) char_bord[i]=new std::unique_ptr<char>[](new char[10]); return; } This results in the following heap of errors, which I did not manage to decipher.
jelmer@jelmer-N56JN:~/Git/Board/lib$ g++ -std=c++0x bord.c In file included from bord.c:1:0: bord.h:20:1: error: new types may not be defined in a return type class bord ^ bord.h:20:1: note: (perhaps a semicolon is missing after the definition of ‘bord’) bord.c:3:12: error: return type specification for constructor invalid bord::bord():char_bord(new std::unique_ptr<char>[10]) ^ bord.c: In constructor ‘bord::bord()’: bord.c:7:46: error: expected primary-expression before ‘]’ token char_bord[i]=new std::unique_ptr<char>[](new char[10]); ^ bord.c:7:60: error: parenthesized initializer in array new [-fpermissive] char_bord[i]=new std::unique_ptr<char>[](new char[10]); ^ bord.c:7:19: error: no match for ‘operator=’ (operand types are ‘std::unique_ptr<char>’ and ‘std::unique_ptr<char>*’) char_bord[i]=new std::unique_ptr<char>[](new char[10]); ^ bord.c:7:19: note: candidates are: In file included from /usr/include/c++/4.9/memory:81:0, from bord.h:19, from bord.c:1: /usr/include/c++/4.9/bits/unique_ptr.h:249:7: note: std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Tp, _Dp>&&) [with _Tp = char; _Dp = std::default_delete<char>] operator=(unique_ptr&& __u) noexcept ^ /usr/include/c++/4.9/bits/unique_ptr.h:249:7: note: no known conversion for argument 1 from ‘std::unique_ptr<char>*’ to ‘std::unique_ptr<char>&&’ /usr/include/c++/4.9/bits/unique_ptr.h:269:2: note: template<class _Up, class _Ep> typename std::enable_if<std::__and_<std::is_convertible<typename std::unique_ptr<_Up, _Ep>::pointer, typename std::unique_ptr<_Tp, _Dp>::_Pointer::type>, std::__not_<std::is_array<_Up> > >::value, std::unique_ptr<_Tp, _Dp>&>::type std::unique_ptr<_Tp, _Dp>::operator=(std::unique_ptr<_Up, _Ep>&&) [with _Up = _Up; _Ep = _Ep; _Tp = char; _Dp = std::default_delete<char>] operator=(unique_ptr<_Up, _Ep>&& __u) noexcept ^ /usr/include/c++/4.9/bits/unique_ptr.h:269:2: note: template argument deduction/substitution failed: bord.c:7:19: note: mismatched types ‘std::unique_ptr<_Tp, _Dp>’ and ‘std::unique_ptr<char>*’ char_bord[i]=new std::unique_ptr<char>[](new char[10]); ^ In file included from /usr/include/c++/4.9/memory:81:0, from bord.h:19, from bord.c:1: /usr/include/c++/4.9/bits/unique_ptr.h:278:7: note: std::unique_ptr<_Tp, _Dp>& std::unique_ptr<_Tp, _Dp>::operator=(std::nullptr_t) [with _Tp = char; _Dp = std::default_delete<char>; std::nullptr_t = std::nullptr_t] operator=(nullptr_t) noexcept ^ /usr/include/c++/4.9/bits/unique_ptr.h:278:7: note: no known conversion for argument 1 from ‘std::unique_ptr<char>*’ to ‘std::nullptr_t’ What am I doing wrong, assuming I am doing something wrong.
std::vector<char>?bord::bord():char_bordshould declare? Is itbord::bord::char_bord(if you also have abordnamespace) or simplybord::char_bord(if yourbordclass is in the global namespace)? Oh and yes...btw...why playing with arrays instead of using a C++ container?