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//@ run-pass
#![allow(dead_code)]
fn match_ref(v: Option<isize>) -> isize {
match v {
Some(ref i) => {
*i
}
None => {0}
}
}
fn match_ref_unused(v: Option<isize>) {
match v {
Some(_) => {}
None => {}
}
}
fn impure(_i: isize) {
}
fn match_imm_reg(v: &Option<isize>) {
match *v {
Some(ref i) => {impure(*i)} // OK because immutable
None => {}
}
}
fn match_mut_reg(v: &mut Option<isize>) {
match *v {
Some(ref i) => {impure(*i)} // OK, frozen
None => {}
}
}
pub fn main() {
}
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