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