mirror of https://github.com/rust-lang/rust
40 lines
1017 B
Rust
40 lines
1017 B
Rust
//@ run-pass
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// This test case tests whether we can handle code bases that contain a high
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// number of closures, something that needs special handling in the MingGW
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// toolchain.
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// See https://github.com/rust-lang/rust/issues/34793 for more information.
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// Make sure we don't optimize anything away:
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//@ compile-flags: -C no-prepopulate-passes -Cpasses=name-anon-globals
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// Expand something exponentially
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macro_rules! go_bacterial {
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($mac:ident) => ($mac!());
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($mac:ident 1 $($t:tt)*) => (
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go_bacterial!($mac $($t)*);
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go_bacterial!($mac $($t)*);
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)
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}
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macro_rules! mk_closure {
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() => ((move || {})())
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}
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macro_rules! mk_fn {
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() => {
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{
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fn function() {
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// Make 16 closures
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go_bacterial!(mk_closure 1 1 1 1);
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}
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let _ = function();
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}
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}
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}
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fn main() {
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// Make 2^8 functions, each containing 16 closures,
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// resulting in 2^12 closures overall.
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go_bacterial!(mk_fn 1 1 1 1 1 1 1 1);
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}
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