On 31.01.2016 18:21, Matt Elkins wrote:
I know I can mark an argument ref to require lvalues, so I'm wondering
whether there is an equivalent for rvalues; that is, is there a way to
specify that an argument to a function MUST be an rvalue?
For example, in C++ I can do this:
[code]
void foo(int && x) {...}
foo(5); // Works fine
int y = 5;
foo(y); // Compile error; y is not an rvalue
[/code]
This functionality turns out to be really useful when dealing with
transferring ownership of resources.
I don't know if this works in all cases, but it passes that simple test:
----
@disable void foo(ref int x);
void foo(int x) {}
void main()
{
foo(5); /* works */
int y = 5;
foo(y); /* error */
}
----