moving unique_ptr in c++

Question

I'm designing a class that has to get ownership of a unique_ptr and do sth with it. Here is a minimized version of the code:

Chunk.h:

class Chunk { public: Chunk(std::unique_ptr<unsigned char[]> contents); std::unique_ptr<char[]> contents; };

Chunk.cpp:

Chunk::Chunk(std::unique_ptr<unsigned char[]> content): contents(std::move(content)){ }

but it couldn't compiled though to this error:

no matching function for call to ‘std::unique_ptr<char []>::unique_ptr(std::remove_reference<std::unique_ptr<unsigned char []>&>::type)’

Why are you using a <unsigned char[]> template as argument and <char[]> template as member? — Aracthor
– Aracthor, Commented Jan 13, 2016 at 11:56
Surely the argument should be a non-const reference to a unique_ptr, or an rvalue reference(&&)? — Martin Bonner supports Monica
– Martin Bonner supports Monica, Commented Jan 13, 2016 at 12:01
@Aracthor oh no! It's about 3 hours that Im checking it and i don't notice this silly mistake! — hamed1soleimani
– hamed1soleimani, Commented Jan 13, 2016 at 12:02

Aracthor · Accepted Answer · 2016-01-13 12:00:56Z

You are using a <unsigned char[]> template as argument and <char[]> template as member.

They are not even considered as the same class at all by the compiler. Use exactly the same type if you plan to use template functions like std::move with it.

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