rust/src/test/run-pass/pass-by-copy.rs

fn magic(+x: {a: @int}) { log x; }
fn magic2(+x: @int) { log x; }

fn main() {
    let a = {a: @10}, b = @10;
    magic(a); magic({a: @20});
    magic2(b); magic2(@20);
}
Add a pass-by-copy parameter passing convention This is intended to solve the problem of how to pass arguments to constructor functions -- you want to move in rvalues, but not have to explicitly copy stuff that is not an rvalue. The by-copy passing convention will ensure the callee gets its own copy of the value. For rvalues, it'll just pass off the value. For lvalues, it'll make a copy. Issue #1177 2011-11-16 05:32:38 -06:00			`fn magic(+x: {a: @int}) { log x; }`
			`fn magic2(+x: @int) { log x; }`

			`fn main() {`
			`let a = {a: @10}, b = @10;`
			`magic(a); magic({a: @20});`
			`magic2(b); magic2(@20);`
			`}`