Implement ZeroMapKV for Pattern<SinglePlaceholder, str>

utils/pattern/Cargo.toml

@@ -29,10 +29,10 @@ litemap = { workspace = true, default-features = false, optional = true }
 serde = { workspace = true, features = ["derive", "alloc"], optional = true }
 yoke = { workspace = true, features = ["derive"], optional = true }
 zerofrom = { workspace = true, features = ["derive"], optional = true }
+zerovec = { workspace = true, features = ["databake", "serde", "yoke"], optional = true }
 
 [dev-dependencies]
 zerofrom = { workspace = true, features = ["alloc"] }
-zerovec = { workspace = true, features = ["databake", "serde"] }
 rmp-serde = { workspace = true }
 serde_json = { workspace = true }
 postcard = { workspace = true, features = ["use-std"] }

utils/pattern/src/implementations.rs

@@ -0,0 +1,26 @@
+// This file is part of ICU4X. For terms of use, please see the file
+// called LICENSE at the top level of the ICU4X source tree
+// (online at: https://github.com/unicode-org/icu4x/blob/main/LICENSE ).
+
+use zerovec::{maps::ZeroMapKV, ule::VarULE, VarZeroSlice, VarZeroVec, ZeroVecError};
+
+use crate::{Pattern, SinglePlaceholder, SinglePlaceholderPattern};
+
+impl<'a> ZeroMapKV<'a> for Pattern<SinglePlaceholder, str> {
+    type Container = VarZeroVec<'a, Pattern<SinglePlaceholder, str>>;
+    type Slice = VarZeroSlice<Pattern<SinglePlaceholder, str>>;
+    type GetType = Pattern<SinglePlaceholder, str>;
+    type OwnedType = Box<Pattern<SinglePlaceholder, str>>;
+}
+
+unsafe impl VarULE for Pattern<SinglePlaceholder, str> {
+    fn validate_byte_slice(bytes: &[u8]) -> Result<(), ZeroVecError> {
+        SinglePlaceholderPattern::try_from_bytes_store(bytes)
+            .map_err(|_| ZeroVecError::VarZeroVecFormatError)?;
+        Ok(())
+    }
+
+    unsafe fn from_byte_slice_unchecked(bytes: &[u8]) -> &Self {
+        &SinglePlaceholderPattern::try_from_bytes_store(bytes).unwrap()
+    }
+}

utils/pattern/src/lib.rs

@@ -55,6 +55,7 @@ mod common;
 mod double;
 mod error;
 mod frontend;
+mod implementations;
 mod multi_named;
 #[cfg(feature = "alloc")]
 mod parser;