39 lines
760 B
Rust
39 lines
760 B
Rust
fn match_imm_box(v: &const @option<int>) -> int {
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alt *v {
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@some(i) {i}
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@none {0}
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}
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}
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fn match_const_box(v: &const @const option<int>) -> int {
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alt *v {
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@some(i) { i } // ok because this is pure
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@none {0}
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}
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}
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pure fn pure_process(_i: int) {}
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fn match_const_box_and_do_pure_things(v: &const @const option<int>) {
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alt *v {
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@some(i) {
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pure_process(i)
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}
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@none {}
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}
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}
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fn process(_i: int) {}
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fn match_const_box_and_do_bad_things(v: &const @const option<int>) {
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alt *v {
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@some(i) { //~ ERROR illegal borrow unless pure: enum variant in aliasable, mutable location
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process(i) //~ NOTE impure due to access to impure function
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}
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@none {}
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}
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}
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fn main() {
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}
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