Enum checksums::options::DepthSetting
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pub enum DepthSetting { Infinite, LastLevel, NRemaining(u32), }
Representation of how deep recursion should be.
Variants
Infinite | Infinite allowed recursion, | |
LastLevel | Last recursion level, go no further. | |
NRemaining | Another Entering a value |
Methods
impl DepthSetting
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fn can_recurse(&self) -> bool
Check if this depth can go one level deeper.
If so, next_level()
will return Some
, otherwise, None
.
Examples
assert!(DepthSetting::Infinite.can_recurse()); assert_false!(DepthSetting::LastLevel.can_recurse()); assert!(DepthSetting::NRemaining(1).can_recurse()); assert!(DepthSetting::NRemaining(100).can_recurse());
fn next_level(&self) -> Option<Self>
Get the next recursion level, if one exists.
The next recursion level does not exist only for LastLevel
.
Examples
// Normally you'd acquire from elsewhere. let depth = DepthSetting::NRemaining(1); if let Some(next) = depth.next_level() { // Recurse into the next level... assert_eq!(next, DepthSetting::LastLevel); }
Trait Implementations
impl FromStr for DepthSetting
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type Err = String
The associated error which can be returned from parsing.
fn from_str(s: &str) -> Result<Self, Self::Err>
Parses a string s
to return a value of this type. Read more
impl From<i32> for DepthSetting
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Derived Implementations
impl Eq for DepthSetting
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impl PartialEq for DepthSetting
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fn eq(&self, __arg_0: &DepthSetting) -> bool
This method tests for self
and other
values to be equal, and is used by ==
. Read more
fn ne(&self, __arg_0: &DepthSetting) -> bool
This method tests for !=
.
impl Hash for DepthSetting
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fn hash<__H: Hasher>(&self, __arg_0: &mut __H)
Feeds this value into the state given, updating the hasher as necessary.
fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher
1.3.0
Feeds a slice of this type into the state provided.
impl Copy for DepthSetting
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impl Clone for DepthSetting
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fn clone(&self) -> DepthSetting
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
1.0.0
Performs copy-assignment from source
. Read more