Comment the arms of the literal parser with example literals

dtolnay · Jan 31, 2023 · 8dbdb72 · 8dbdb72
1 parent 055a4a5
commit 8dbdb72
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/lit.rs b/src/lit.rs
@@ -951,19 +951,22 @@ mod value {
             let repr = token.to_string();
 
             match byte(&repr, 0) {
+                // "...", r"...", r#"..."#
                 b'"' | b'r' => {
                     let (_, suffix) = parse_lit_str(&repr);
                     return Lit::Str(LitStr {
                         repr: Box::new(LitRepr { token, suffix }),
                     });
                 }
                 b'b' => match byte(&repr, 1) {
+                    // b"...", br"...", br#"...#"
                     b'"' | b'r' => {
                         let (_, suffix) = parse_lit_byte_str(&repr);
                         return Lit::ByteStr(LitByteStr {
                             repr: Box::new(LitRepr { token, suffix }),
                         });
                     }
+                    // b'...'
                     b'\'' => {
                         let (_, suffix) = parse_lit_byte(&repr);
                         return Lit::Byte(LitByte {
@@ -972,13 +975,15 @@ mod value {
                     }
                     _ => {}
                 },
+                // '...'
                 b'\'' => {
                     let (_, suffix) = parse_lit_char(&repr);
                     return Lit::Char(LitChar {
                         repr: Box::new(LitRepr { token, suffix }),
                     });
                 }
                 b'0'..=b'9' | b'-' => {
+                    // 0, 123, 0xFF, 0o77, 0b11
                     if let Some((digits, suffix)) = parse_lit_int(&repr) {
                         return Lit::Int(LitInt {
                             repr: Box::new(LitIntRepr {
@@ -988,6 +993,7 @@ mod value {
                             }),
                         });
                     }
+                    // 1.0, 1e-1, 1e+1
                     if let Some((digits, suffix)) = parse_lit_float(&repr) {
                         return Lit::Float(LitFloat {
                             repr: Box::new(LitFloatRepr {
@@ -998,6 +1004,7 @@ mod value {
                         });
                     }
                 }
+                // true, false
                 b't' | b'f' => {
                     if repr == "true" || repr == "false" {
                         return Lit::Bool(LitBool {