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is_zero for hash types

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arkpar 2016-01-09 10:20:07 +01:00
parent 647ea286ba
commit 49d97d7cb3
1 changed files with 5 additions and 0 deletions
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src/hash.rs
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@ -30,6 +30,7 @@ pub trait FixedHash: Sized + BytesConvertable {
fn bloom_part<T>(&self, m: usize) -> T where T: FixedHash; fn bloom_part<T>(&self, m: usize) -> T where T: FixedHash;
fn contains_bloom<T>(&self, b: &T) -> bool where T: FixedHash; fn contains_bloom<T>(&self, b: &T) -> bool where T: FixedHash;
fn contains<'a>(&'a self, b: &'a Self) -> bool; fn contains<'a>(&'a self, b: &'a Self) -> bool;
fn is_zero(&self) -> bool;
} }
macro_rules! impl_hash { macro_rules! impl_hash {
@ -165,6 +166,10 @@ macro_rules! impl_hash {
fn contains<'a>(&'a self, b: &'a Self) -> bool { fn contains<'a>(&'a self, b: &'a Self) -> bool {
&(b & self) == b &(b & self) == b
} }
fn is_zero(&self) -> bool {
self.eq(&Self::new())
}
} }
impl FromStr for $from { impl FromStr for $from {