Replace get_split with split_first_chunk builtin

src/binary/lexer.rs

@@ -85,13 +85,13 @@ impl LexemeId {
 #[inline]
 pub(crate) fn read_id(data: &[u8]) -> Result<(LexemeId, &[u8]), LexError> {
     let (head, rest) = get_split::<2>(data).ok_or(LexError::Eof)?;
-    Ok((LexemeId::new(u16::from_le_bytes(head)), rest))
+    Ok((LexemeId::new(u16::from_le_bytes(*head)), rest))
 }
 
 #[inline]
 pub(crate) fn read_string(data: &[u8]) -> Result<(Scalar, &[u8]), LexError> {
     let (head, rest) = get_split::<2>(data).ok_or(LexError::Eof)?;
-    let text_len = usize::from(u16::from_le_bytes(head));
+    let text_len = usize::from(u16::from_le_bytes(*head));
     if text_len <= rest.len() {
         let (text, rest) = rest.split_at(text_len);
         Ok((Scalar::new(text), rest))
@@ -109,34 +109,34 @@ pub(crate) fn read_bool(data: &[u8]) -> Result<(bool, &[u8]), LexError> {
 #[inline]
 pub(crate) fn read_u32(data: &[u8]) -> Result<(u32, &[u8]), LexError> {
     let (head, rest) = get_split::<4>(data).ok_or(LexError::Eof)?;
-    Ok((u32::from_le_bytes(head), rest))
+    Ok((u32::from_le_bytes(*head), rest))
 }
 
 #[inline]
 pub(crate) fn read_u64(data: &[u8]) -> Result<(u64, &[u8]), LexError> {
     let (head, rest) = get_split::<8>(data).ok_or(LexError::Eof)?;
-    Ok((u64::from_le_bytes(head), rest))
+    Ok((u64::from_le_bytes(*head), rest))
 }
 
 #[inline]
 pub(crate) fn read_i64(data: &[u8]) -> Result<(i64, &[u8]), LexError> {
     let (head, rest) = get_split::<8>(data).ok_or(LexError::Eof)?;
-    Ok((i64::from_le_bytes(head), rest))
+    Ok((i64::from_le_bytes(*head), rest))
 }
 
 #[inline]
 pub(crate) fn read_i32(data: &[u8]) -> Result<(i32, &[u8]), LexError> {
     let (head, rest) = get_split::<4>(data).ok_or(LexError::Eof)?;
-    Ok((i32::from_le_bytes(head), rest))
+    Ok((i32::from_le_bytes(*head), rest))
 }
 
 #[inline]
-pub(crate) fn read_f32(data: &[u8]) -> Result<([u8; 4], &[u8]), LexError> {
+pub(crate) fn read_f32(data: &[u8]) -> Result<(&[u8; 4], &[u8]), LexError> {
     get_split::<4>(data).ok_or(LexError::Eof)
 }
 
 #[inline]
-pub(crate) fn read_f64(data: &[u8]) -> Result<([u8; 8], &[u8]), LexError> {
+pub(crate) fn read_f64(data: &[u8]) -> Result<(&[u8; 8], &[u8]), LexError> {
     get_split::<8>(data).ok_or(LexError::Eof)
 }
 
@@ -307,8 +307,8 @@ pub(crate) fn read_token(data: &[u8]) -> Result<(Token, &[u8]), LexError> {
         LexemeId::BOOL => read_bool(data).map(|(x, d)| (Token::Bool(x), d)),
         LexemeId::QUOTED => read_string(data).map(|(x, d)| (Token::Quoted(x), d)),
         LexemeId::UNQUOTED => read_string(data).map(|(x, d)| (Token::Unquoted(x), d)),
-        LexemeId::F32 => read_f32(data).map(|(x, d)| (Token::F32(x), d)),
-        LexemeId::F64 => read_f64(data).map(|(x, d)| (Token::F64(x), d)),
+        LexemeId::F32 => read_f32(data).map(|(x, d)| (Token::F32(*x), d)),
+        LexemeId::F64 => read_f64(data).map(|(x, d)| (Token::F64(*x), d)),
         LexemeId::RGB => read_rgb(data).map(|(x, d)| (Token::Rgb(x), d)),
         LexemeId::I64 => read_i64(data).map(|(x, d)| (Token::I64(x), d)),
         LexemeId(id) => Ok((Token::Id(id), data)),
@@ -714,7 +714,7 @@ impl<'a> Lexer<'a> {
     pub fn read_f32(&mut self) -> Result<[u8; 4], LexerError> {
         let (result, rest) = read_f32(self.data).map_err(|e| self.err_position(e))?;
         self.data = rest;
-        Ok(result)
+        Ok(*result)
     }
 
     /// Advance the lexer through 64 bits of floating point data and return the bytes
@@ -730,7 +730,7 @@ impl<'a> Lexer<'a> {
     pub fn read_f64(&mut self) -> Result<[u8; 8], LexerError> {
         let (result, rest) = read_f64(self.data).map_err(|e| self.err_position(e))?;
         self.data = rest;
-        Ok(result)
+        Ok(*result)
     }
 
     /// Advance the lexer through an rgb value (with optional alpha channel)

src/binary/tape.rs

@@ -153,7 +153,7 @@ impl<'a> ParserState<'a, '_> {
 
     #[inline]
     fn parse_next_id_opt(&self, data: &'a [u8]) -> Option<(&'a [u8], u16)> {
-        get_split::<2>(data).map(|(head, rest)| (rest, u16::from_le_bytes(head)))
+        get_split::<2>(data).map(|(head, rest)| (rest, u16::from_le_bytes(*head)))
     }
 
     #[inline]
@@ -194,14 +194,14 @@ impl<'a> ParserState<'a, '_> {
     #[inline]
     fn parse_f32(&mut self, data: &'a [u8]) -> Result<&'a [u8], Error> {
         let (result, rest) = read_f32(data).map_err(|e| self.err_position(e, data))?;
-        self.token_tape.alloc().init(BinaryToken::F32(result));
+        self.token_tape.alloc().init(BinaryToken::F32(*result));
         Ok(rest)
     }
 
     #[inline]
     fn parse_f64(&mut self, data: &'a [u8]) -> Result<&'a [u8], Error> {
         let (result, rest) = read_f64(data).map_err(|e| self.err_position(e, data))?;
-        self.token_tape.alloc().init(BinaryToken::F64(result));
+        self.token_tape.alloc().init(BinaryToken::F64(*result));
         Ok(rest)
     }
 

src/util.rs

@@ -6,8 +6,8 @@ fn take<const N: usize>(data: &[u8]) -> [u8; N] {
 }
 
 #[inline]
-pub(crate) fn get_split<const N: usize>(data: &[u8]) -> Option<([u8; N], &[u8])> {
-    data.get(N..).map(|d| (take::<N>(data), d))
+pub(crate) fn get_split<const N: usize>(data: &[u8]) -> Option<(&[u8; N], &[u8])> {
+    data.split_first_chunk::<N>()
 }
 
 /// https://youtu.be/wlvKAT7SZIQ?si=EndNPTY6f8oEBS--&t=2426