[Rust] Take slices by reference.

Author: gierlachg

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/rust/LibRsDef.java

@@ -56,7 +56,7 @@ void generate() throws IOException
         {
             indent(libRs, 0, "#![forbid(unsafe_code)]\n");
             indent(libRs, 0, "#![allow(clippy::upper_case_acronyms)]\n");
-            indent(libRs, 0, "#![allow(non_camel_case_types)]\n");
+            indent(libRs, 0, "#![allow(non_camel_case_types)]\n\n");
             indent(libRs, 0, "use ::core::{convert::TryInto};\n\n");
 
             final ArrayList<String> modules = new ArrayList<>();
@@ -226,7 +226,7 @@ static void generateWriteBuf(final Writer writer, final ByteOrder byteOrder) thr
         indent(writer, 1, "#[inline]\n");
         indent(writer, 1,
             "pub fn put_bytes_at<const COUNT: usize>(&mut self, index: usize, bytes: [u8; COUNT]) -> usize {\n");
-        indent(writer, 2, "self.data[index..index + COUNT].copy_from_slice(&bytes);\n");
+        indent(writer, 2, "self.data[index..index + COUNT].copy_from_slice(bytes);\n");
         indent(writer, 2, "COUNT\n");
         indent(writer, 1, "}\n\n");
 
@@ -245,7 +245,7 @@ static void generateWriteBuf(final Writer writer, final ByteOrder byteOrder) thr
             // put_<primitive>_at
             indent(writer, 1, "#[inline]\n");
             indent(writer, 1, "pub fn put_%1$s_at(&mut self, index: usize, value: %1$s) {\n", primitiveType);
-            indent(writer, 2, "self.put_bytes_at(index, %s::to_%s_bytes(value));\n", primitiveType, endianness);
+            indent(writer, 2, "self.put_bytes_at(index, &%s::to_%s_bytes(value));\n", primitiveType, endianness);
             indent(writer, 1, "}\n\n");
         }
 

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/rust/RustGenerator.java

@@ -379,7 +379,7 @@ private static void generatePrimitiveEncoder(
             indent(sb, level, "/// - encodedLength: %d\n", typeToken.encodedLength());
             indent(sb, level, "/// - version: %d\n", typeToken.version());
             indent(sb, level, "#[inline]\n");
-            indent(sb, level, "pub fn %s(&mut self, value: [%s; %d]) {\n",
+            indent(sb, level, "pub fn %s(&mut self, value: &[%s; %d]) {\n",
                 formatFunctionName(name),
                 rustPrimitiveType,
                 arrayLength);