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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
fn match_ref(v: Option<int>) -> int {
match v {
Some(ref i) => {
*i
}
None => {0}
}
}
fn match_ref_unused(v: Option<int>) {
match v {
Some(_) => {}
None => {}
}
}
fn match_const_reg(v: &const Option<int>) -> int {
match *v {
Some(ref i) => {*i} //~ ERROR cannot borrow
//~^ ERROR unsafe borrow
None => {0}
}
}
fn impure(_i: int) {
}
fn match_const_reg_unused(v: &const Option<int>) {
match *v {
Some(_) => {impure(0)} // OK because nothing is captured
None => {}
}
}
fn match_const_reg_impure(v: &const Option<int>) {
match *v {
Some(ref i) => {impure(*i)} //~ ERROR cannot borrow
//~^ ERROR unsafe borrow
None => {}
}
}
fn match_imm_reg(v: &Option<int>) {
match *v {
Some(ref i) => {impure(*i)} // OK because immutable
None => {}
}
}
fn match_mut_reg(v: &mut Option<int>) {
match *v {
Some(ref i) => {impure(*i)} // OK, frozen
None => {}
}
}
fn main() {
}
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