123 lines
2.6 KiB
Rust
123 lines
2.6 KiB
Rust
#![warn(clippy::only_used_in_recursion)]
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fn simple(a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { simple(a - 1, b) }
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}
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fn with_calc(a: usize, b: isize) -> usize {
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if a == 0 { 1 } else { with_calc(a - 1, -b + 1) }
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}
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fn tuple((a, b): (usize, usize)) -> usize {
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if a == 0 { 1 } else { tuple((a - 1, b + 1)) }
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}
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fn let_tuple(a: usize, b: usize) -> usize {
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let (c, d) = (a, b);
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if c == 0 { 1 } else { let_tuple(c - 1, d + 1) }
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}
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fn array([a, b]: [usize; 2]) -> usize {
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if a == 0 { 1 } else { array([a - 1, b + 1]) }
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}
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fn index(a: usize, mut b: &[usize], c: usize) -> usize {
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if a == 0 { 1 } else { index(a - 1, b, c + b[0]) }
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}
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fn break_(a: usize, mut b: usize, mut c: usize) -> usize {
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let c = loop {
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b += 1;
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c += 1;
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if c == 10 {
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break b;
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}
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};
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if a == 0 { 1 } else { break_(a - 1, c, c) }
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}
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// this has a side effect
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fn mut_ref(a: usize, b: &mut usize) -> usize {
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*b = 1;
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if a == 0 { 1 } else { mut_ref(a - 1, b) }
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}
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fn mut_ref2(a: usize, b: &mut usize) -> usize {
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let mut c = *b;
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if a == 0 { 1 } else { mut_ref2(a - 1, &mut c) }
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}
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fn not_primitive(a: usize, b: String) -> usize {
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if a == 0 { 1 } else { not_primitive(a - 1, b) }
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}
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// this doesn't have a side effect,
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// but `String` is not primitive.
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fn not_primitive_op(a: usize, b: String, c: &str) -> usize {
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if a == 1 { 1 } else { not_primitive_op(a, b + c, c) }
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}
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struct A;
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impl A {
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fn method(a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { A::method(a - 1, b - 1) }
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}
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fn method2(&self, a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { self.method2(a - 1, b + 1) }
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}
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}
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trait B {
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fn hello(a: usize, b: usize) -> usize;
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fn hello2(&self, a: usize, b: usize) -> usize;
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}
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impl B for A {
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fn hello(a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { A::hello(a - 1, b + 1) }
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}
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fn hello2(&self, a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { self.hello2(a - 1, b + 1) }
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}
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}
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trait C {
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fn hello(a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { Self::hello(a - 1, b + 1) }
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}
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fn hello2(&self, a: usize, b: usize) -> usize {
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if a == 0 { 1 } else { self.hello2(a - 1, b + 1) }
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}
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}
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fn ignore(a: usize, _: usize) -> usize {
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if a == 1 { 1 } else { ignore(a - 1, 0) }
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}
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fn ignore2(a: usize, _b: usize) -> usize {
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if a == 1 { 1 } else { ignore2(a - 1, _b) }
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}
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fn f1(a: u32) -> u32 {
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a
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}
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fn f2(a: u32) -> u32 {
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f1(a)
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}
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fn inner_fn(a: u32) -> u32 {
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fn inner_fn(a: u32) -> u32 {
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a
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}
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inner_fn(a)
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}
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fn main() {}
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