mirror of https://github.com/rust-lang/rust
42 lines
794 B
Rust
42 lines
794 B
Rust
//@ run-pass
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// Tests that two closures can simultaneously have immutable
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// access to the variable, whether that immutable access be used
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// for direct reads or for taking immutable ref. Also check
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// that the main function can read the variable too while
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// the closures are in scope. Issue #6801.
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fn a() -> i32 {
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let mut x = 3;
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x += 1;
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let c1 = || x * 4;
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let c2 = || x * 5;
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c1() * c2() * x
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}
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fn get(x: &i32) -> i32 {
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*x * 4
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}
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fn b() -> i32 {
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let mut x = 3;
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x += 1;
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let c1 = || get(&x);
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let c2 = || get(&x);
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c1() * c2() * x
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}
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fn c() -> i32 {
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let mut x = 3;
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x += 1;
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let c1 = || x * 5;
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let c2 = || get(&x);
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c1() * c2() * x
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}
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pub fn main() {
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assert_eq!(a(), 1280);
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assert_eq!(b(), 1024);
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assert_eq!(c(), 1280);
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}
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