diff --git a/src/usage_parser.rs b/src/usage_parser.rs
index e33ea008..a8e2c737 100644
--- a/src/usage_parser.rs
+++ b/src/usage_parser.rs
@@ -197,27 +197,22 @@ impl<'a> UsageParser<'a> {
 
 #[inline]
 fn name_end(b: u8) -> bool {
-    // 93(]), 62(>)
-    b > b']' || b < b'>' || (b > b'>' && b < b']')
+    b != b']' && b != b'>'
 }
 
 #[inline]
 fn token(b: u8) -> bool {
-    // 39('), 45(-), 46(.), 60(<), 91([)
-    b < 39 || b > 91 || (b > 46 && b < 91 && b != b'<') || (b > 39 && b < 45)
+    b != b'\'' && b != b'.' && b != b'<' && b != b'[' && b != b'-'
 }
 
 #[inline]
 fn long_end(b: u8) -> bool {
-    // 39('), 46(.), 60(<), 61(=), 91([), 32( )
-    (b < 39 && (b > 13 && b != b' ')) || b > 91 || (b > 61 && b < 91) ||
-    (b > 39 && b < 60 && b != 46)
+    b != b'\'' && b != b'.' && b != b'<' && b != b'[' && b != b'=' && b != b' '
 }
 
 #[inline]
 fn help_start(b: u8) -> bool {
-    // 39(')
-    b < 39 || b > 39
+    b != b'\''
 }
 
 #[cfg(test)]