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digest: add blanket-impls feature to gate blanket Digest impl #2311

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remix7531 wants to merge 1 commit into from
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digest: add blanket-impls feature to gate blanket Digest impl #2311

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3 changes: 2 additions & 1 deletion digest/Cargo.toml
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Expand Up @@ -26,9 +26,10 @@ zeroize = { version = "1.7", optional = true, default-features = false }
sha2 = "0.11.0-rc.5"

[features]
default = ["block-api"]
default = ["block-api", "blanket-impls"]
alloc = []
block-api = ["dep:block-buffer"] # Enable block API traits
blanket-impls = [] # Enable blanket implementations of Digest and other traits
dev = ["blobby"]
getrandom = ["common/getrandom", "rand_core"]
mac = ["dep:ctutils"] # Enable MAC traits
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1 change: 1 addition & 0 deletions digest/src/digest.rs
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Expand Up @@ -56,6 +56,7 @@ pub trait Digest: OutputSizeUser {
fn digest(data: impl AsRef<[u8]>) -> Output<Self>;
}

#[cfg(feature = "blanket-impls")]
impl<D: FixedOutput + Default + Update + HashMarker> Digest for D {
#[inline]
fn new() -> Self {
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