cranelift_control/
zero_sized.rs

1//! Shims for ControlPlane when chaos mode is disabled. Enables
2//! unconditional use of the type and its methods throughout cranelift.
3
4/// A shim for ControlPlane when chaos mode is disabled.
5/// Please see the [crate-level documentation](crate).
6#[derive(Debug, Clone, Default)]
7pub struct ControlPlane {
8    /// prevent direct instantiation (use `default` instead)
9    _private: (),
10}
11
12/// A shim for ControlPlane's `Arbitrary` implementation when chaos mode is
13/// disabled. It doesn't consume any bytes and always returns a default
14/// control plane.
15#[cfg(feature = "fuzz")]
16impl arbitrary::Arbitrary<'_> for ControlPlane {
17    fn arbitrary(_u: &mut arbitrary::Unstructured<'_>) -> arbitrary::Result<Self> {
18        Ok(Self::default())
19    }
20}
21
22impl ControlPlane {
23    /// Set the [fuel limit](crate#fuel-limit). This variant is used when
24    /// chaos mode is disabled. It doesn't do anything.
25    pub fn set_fuel(&mut self, _fuel: u8) {}
26
27    /// Returns a pseudo-random boolean. This variant is used when chaos
28    /// mode is disabled. It always returns `false`.
29    #[inline]
30    pub fn get_decision(&mut self) -> bool {
31        false
32    }
33
34    /// Returns an arbitrary value. This variant is used when chaos mode is
35    /// disabled. It always returns the default value.
36    #[inline]
37    pub fn get_arbitrary<T: Default>(&mut self) -> T {
38        T::default()
39    }
40
41    /// Shuffles the items in the slice into a pseudo-random permutation.
42    /// This variant is used when chaos mode is disabled. It doesn't do
43    /// anything.
44    #[inline]
45    pub fn shuffle<T>(&mut self, _slice: &mut [T]) {}
46
47    /// Returns a new iterator over the same items as the input iterator in
48    /// a pseudo-random order. This variant is used when chaos mode is
49    /// disabled. It always returns the same order.
50    #[inline]
51    pub fn shuffled<T>(&mut self, iter: impl Iterator<Item = T>) -> impl Iterator<Item = T> {
52        iter
53    }
54}
cranelift_control/zero_sized.rs

cranelift_control/
zero_sized.rs
