49 lines
1.4 KiB
Rust
49 lines
1.4 KiB
Rust
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// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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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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// 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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() => ({
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let c = |a: u32| a + 4;
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let _ = c(2);
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})
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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 2^12 functions, each containing 16 closures,
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// resulting in 2^16 closures overall.
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go_bacterial!(mk_fn 1 1 1 1 1 1 1 1 1 1 1 1);
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}
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