rust/tests/ui/regions/regions-nested-fns-2.rs

fn ignore<F>(_f: F) where F: for<'z> FnOnce(&'z isize) -> &'z isize {}

fn nested() {
    let y = 3;
    ignore(
        |z| {
            if false { &y } else { z }
            //~^ ERROR `y` does not live long enough
        });
}

fn main() {}
Update compile fail tests to use isize. 2015-01-08 21:54:35 +11:00			`fn ignore<F>(_f: F) where F: for<'z> FnOnce(&'z isize) -> &'z isize {}`
Fix #2979: inference for lifetimes of & expressions What we now do is to create a region variable for each & expression (and also each borrow). The lifetime of this variable will be checked by borrowck to ensure it is not greater than the lifetime of the underlying data. This both leads to shorter lifetimes in some cases but also longer in others, such as taking the address to the interior of unique boxes tht are rooted in region pointers (e.g., returning a pointer to the interior of a sendable map). This may lead to issue #2977 if the rvalue is not POD, because we may drop the data in trans sooner than borrowck expects us to. Need to work out precisely where that fix ought to occur. 2012-07-26 08:51:57 -07:00
			`fn nested() {`
			`let y = 3;`
test -- update tests with new error messages 2014-02-10 07:44:03 -05:00			`ignore(`
Update error format for E0373 2016-08-05 19:53:14 +02:00			`\|z\| {`
test -- update tests with new error messages 2014-02-10 07:44:03 -05:00			`if false { &y } else { z }`
update tests for migrate mode by default 2019-04-22 08:40:08 +01:00			//~^ ERROR `y` does not live long enough
test -- update tests with new error messages 2014-02-10 07:44:03 -05:00			`});`
Fix #2979: inference for lifetimes of & expressions What we now do is to create a region variable for each & expression (and also each borrow). The lifetime of this variable will be checked by borrowck to ensure it is not greater than the lifetime of the underlying data. This both leads to shorter lifetimes in some cases but also longer in others, such as taking the address to the interior of unique boxes tht are rooted in region pointers (e.g., returning a pointer to the interior of a sendable map). This may lead to issue #2977 if the rvalue is not POD, because we may drop the data in trans sooner than borrowck expects us to. Need to work out precisely where that fix ought to occur. 2012-07-26 08:51:57 -07:00			`}`

librustc: Replace `impl Type : Trait` with `impl Trait for Type`. rs=implflipping 2013-02-14 11:47:00 -08:00			`fn main() {}`