sam/lazy/record/position: Implement crate::alignment::record::Positio…

…n for Position

noodles-sam/src/lazy/record/position.rs

@@ -2,6 +2,8 @@ use std::io;
 
 use noodles_core as core;
 
+use crate::alignment::record::Position as _;
+
 /// Raw SAM record position.
 #[derive(Debug, Eq, PartialEq)]
 pub struct Position<'a>(&'a [u8]);
@@ -12,6 +14,13 @@ impl<'a> Position<'a> {
     }
 }
 
+impl<'a> crate::alignment::record::Position for Position<'a> {
+    fn try_to_usize(&self) -> io::Result<usize> {
+        lexical_core::parse(self.as_ref())
+            .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
+    }
+}
+
 impl<'a> AsRef<[u8]> for Position<'a> {
     fn as_ref(&self) -> &[u8] {
         self.0
@@ -22,11 +31,8 @@ impl<'a> TryFrom<Position<'a>> for core::Position {
     type Error = io::Error;
 
     fn try_from(raw_position: Position<'a>) -> Result<Self, Self::Error> {
-        lexical_core::parse(raw_position.as_ref())
-            .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
-            .and_then(|n: usize| {
-                core::Position::try_from(n)
-                    .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
-            })
+        raw_position.try_to_usize().and_then(|n: usize| {
+            core::Position::try_from(n).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
+        })
     }
 }