62 lines
1021 B
Rust
62 lines
1021 B
Rust
//@ build-fail
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#![allow(unused)]
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#![recursion_limit = "20"]
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#![type_length_limit = "20000000"]
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#![crate_type = "rlib"]
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#[derive(Clone)]
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struct A (B);
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impl A {
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pub fn matches<F: Fn()>(&self, f: &F) {
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let &A(ref term) = self;
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term.matches(f);
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}
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}
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#[derive(Clone)]
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enum B {
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Variant1,
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Variant2(C),
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}
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impl B {
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pub fn matches<F: Fn()>(&self, f: &F) {
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match self {
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&B::Variant2(ref factor) => {
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factor.matches(&|| ())
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}
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_ => unreachable!("")
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}
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}
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}
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#[derive(Clone)]
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struct C (D);
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impl C {
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pub fn matches<F: Fn()>(&self, f: &F) {
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let &C(ref base) = self;
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base.matches(&|| {
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//~^ ERROR reached the type-length limit
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C(base.clone()).matches(f)
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})
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}
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}
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#[derive(Clone)]
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struct D (Box<A>);
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impl D {
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pub fn matches<F: Fn()>(&self, f: &F) {
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let &D(ref a) = self;
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a.matches(f)
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}
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}
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pub fn matches() {
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A(B::Variant1).matches(&(|| ()))
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}
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