rust/tests/mir-opt/inline/inline_closure.rs

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// compile-flags: -Z span_free_formats
// Tests that MIR inliner can handle closure arguments. (#45894)
fn main() {
println!("{}", foo(0, 14));
}
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// EMIT_MIR inline_closure.foo.Inline.after.mir
fn foo<T: Copy>(_t: T, q: i32) -> i32 {
let x = |_t, _q| _t;
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// CHECK-LABEL: fn foo(
// CHECK: (inlined foo::<T>::{closure#0})
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x(q, q)
}