Use byte string literals where possible

Author: jhpratt

src/format_description/parse.rs

@@ -54,12 +54,12 @@ fn parse_item<'a>(
     if let [b'[', b'[', remaining @ ..] = s {
         *index += 2;
         return Ok(ParsedItem {
-            item: FormatItem::Literal(&[b'[']),
+            item: FormatItem::Literal(b"["),
             remaining,
         });
     };
 
-    if s.starts_with(&[b'[']) {
+    if s.starts_with(b"[") {
         if let Some(bracket_index) = s.iter().position(|&c| c == b']') {
             *index += 1; // opening bracket
             let ret_val = ParsedItem {

src/formatting/formattable.rs

@@ -180,21 +180,21 @@ impl sealed::Sealed for Rfc3339 {
         }
 
         bytes += format_number_pad_zero::<4, _, _>(output, year as u32)?;
-        bytes += write(output, &[b'-'])?;
+        bytes += write(output, b"-")?;
         bytes += format_number_pad_zero::<2, _, _>(output, date.month() as u8)?;
-        bytes += write(output, &[b'-'])?;
+        bytes += write(output, b"-")?;
         bytes += format_number_pad_zero::<2, _, _>(output, date.day())?;
-        bytes += write(output, &[b'T'])?;
+        bytes += write(output, b"T")?;
         bytes += format_number_pad_zero::<2, _, _>(output, time.hour())?;
-        bytes += write(output, &[b':'])?;
+        bytes += write(output, b":")?;
         bytes += format_number_pad_zero::<2, _, _>(output, time.minute())?;
-        bytes += write(output, &[b':'])?;
+        bytes += write(output, b":")?;
         bytes += format_number_pad_zero::<2, _, _>(output, time.second())?;
 
         #[allow(clippy::if_not_else)]
         if time.nanosecond() != 0 {
             let nanos = time.nanosecond();
-            bytes += write(output, &[b'.'])?;
+            bytes += write(output, b".")?;
             bytes += if nanos % 10 != 0 {
                 format_number_pad_zero::<9, _, _>(output, nanos)
             } else if (nanos / 10) % 10 != 0 {
@@ -217,20 +217,13 @@ impl sealed::Sealed for Rfc3339 {
         }
 
         if offset == UtcOffset::UTC {
-            bytes += write(output, &[b'Z'])?;
+            bytes += write(output, b"Z")?;
             return Ok(bytes);
         }
 
-        bytes += write(
-            output,
-            if offset.is_negative() {
-                &[b'-']
-            } else {
-                &[b'+']
-            },
-        )?;
+        bytes += write(output, if offset.is_negative() { b"-" } else { b"+" })?;
         bytes += format_number_pad_zero::<2, _, _>(output, offset.whole_hours().unsigned_abs())?;
-        bytes += write(output, &[b':'])?;
+        bytes += write(output, b":")?;
         bytes +=
             format_number_pad_zero::<2, _, _>(output, offset.minutes_past_hour().unsigned_abs())?;
 

src/formatting/mod.rs

@@ -198,7 +198,7 @@ pub(crate) fn format_number_pad_space<
 ) -> Result<usize, io::Error> {
     let mut bytes = 0;
     for _ in 0..(WIDTH.saturating_sub(value.num_digits())) {
-        bytes += write(output, &[b' '])?;
+        bytes += write(output, b" ")?;
     }
     bytes += write(output, itoa::Buffer::new().format(value).as_bytes())?;
     Ok(bytes)
@@ -217,7 +217,7 @@ pub(crate) fn format_number_pad_zero<
 ) -> Result<usize, io::Error> {
     let mut bytes = 0;
     for _ in 0..(WIDTH.saturating_sub(value.num_digits())) {
-        bytes += write(output, &[b'0'])?;
+        bytes += write(output, b"0")?;
     }
     bytes += write(output, itoa::Buffer::new().format(value).as_bytes())?;
     Ok(bytes)
@@ -371,9 +371,9 @@ fn fmt_year(
     let mut bytes = 0;
     if repr != modifier::YearRepr::LastTwo {
         if full_year < 0 {
-            bytes += write(output, &[b'-'])?;
+            bytes += write(output, b"-")?;
         } else if sign_is_mandatory || cfg!(feature = "large-dates") && full_year >= 10_000 {
-            bytes += write(output, &[b'+'])?;
+            bytes += write(output, b"+")?;
         }
     }
     bytes += format_number(output, value.unsigned_abs(), padding)?;
@@ -478,9 +478,9 @@ fn fmt_offset_hour(
 ) -> Result<usize, io::Error> {
     let mut bytes = 0;
     if offset.is_negative() {
-        bytes += write(output, &[b'-'])?;
+        bytes += write(output, b"-")?;
     } else if sign_is_mandatory {
-        bytes += write(output, &[b'+'])?;
+        bytes += write(output, b"+")?;
     }
     bytes += format_number::<2, _, _>(output, offset.whole_hours().unsigned_abs(), padding)?;
     Ok(bytes)

time-macros/src/format_description/parse.rs

@@ -43,12 +43,12 @@ fn parse_item<'a>(
     if let [b'[', b'[', remaining @ ..] = s {
         *index += 2;
         return Ok(ParsedItem {
-            item: FormatItem::Literal(&[b'[']),
+            item: FormatItem::Literal(b"["),
             remaining,
         });
     };
 
-    if s.starts_with(&[b'[']) {
+    if s.starts_with(b"[") {
         if let Some(bracket_index) = s.iter().position(|&c| c == b']') {
             *index += 1; // opening bracket
             let ret_val = ParsedItem {