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FileIn and Buffer cannot be composed in a class? [message #56555]

Thu, 25 March 2021 05:20

jjacksonRIAB
Messages: 227
Registered: June 2011

Experienced Member

If I try to put either in a class I cannot use move constructors, copy constructors, etc on an enclosing class because they are implicitly deleted by these two. What's the workaround?

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Re: FileIn and Buffer cannot be composed in a class? [message #56556 is a reply to message #56555]

Thu, 25 March 2021 05:29

jjacksonRIAB
Messages: 227
Registered: June 2011

Experienced Member

I was wrong about Buffer, that works with a move constructor. Still, FileIn and all of its dependencies down to Stream do not.

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Re: FileIn and Buffer cannot be composed in a class? [message #56558 is a reply to message #56555]

Thu, 25 March 2021 10:08

Oblivion
Messages: 1266
Registered: August 2007

Senior Contributor

Hello jjacksonRIAB,

You can use One<FileIn> for FileIn (or for anything), if you need to move it.

e.g.

struct Foo {
	One<FileIn> fin;
	Foo() { fin.Create(); }
};

CONSOLE_APP_MAIN
{
	StdLogSetup(LOG_COUT);
	Foo foo;
	Foo f = pick(foo);
	RDUMP(f.fin.IsEmpty());
	
}

Should return "false". Smile