initial step towards implementing C string literals

Author: fee1-dead

clippy_lints/src/matches/match_same_arms.rs

@@ -284,6 +284,7 @@ impl<'a> NormalizedPat<'a> {
                     LitKind::Str(sym, _) => Self::LitStr(sym),
                     LitKind::ByteStr(ref bytes, _) => Self::LitBytes(bytes),
                     LitKind::Byte(val) => Self::LitInt(val.into()),
+                    LitKind::CStr(ref bytes, _) => Self::LitBytes(bytes),
                     LitKind::Char(val) => Self::LitInt(val.into()),
                     LitKind::Int(val, _) => Self::LitInt(val),
                     LitKind::Bool(val) => Self::LitBool(val),

clippy_lints/src/utils/author.rs

@@ -304,6 +304,11 @@ impl<'a, 'tcx> PrintVisitor<'a, 'tcx> {
                 kind!("ByteStr(ref {vec})");
                 chain!(self, "let [{:?}] = **{vec}", vec.value);
             },
+            LitKind::CStr(ref vec, _) => {
+                bind!(self, vec);
+                kind!("CStr(ref {vec})");
+                chain!(self, "let [{:?}] = **{vec}", vec.value);
+            }
             LitKind::Str(s, _) => {
                 bind!(self, s);
                 kind!("Str({s}, _)");

clippy_utils/src/consts.rs

@@ -211,6 +211,7 @@ pub fn lit_to_mir_constant(lit: &LitKind, ty: Option<Ty<'_>>) -> Constant {
         LitKind::Str(ref is, _) => Constant::Str(is.to_string()),
         LitKind::Byte(b) => Constant::Int(u128::from(b)),
         LitKind::ByteStr(ref s, _) => Constant::Binary(Lrc::clone(s)),
+        LitKind::CStr(ref s, _) => Constant::Binary(Lrc::clone(s)),
         LitKind::Char(c) => Constant::Char(c),
         LitKind::Int(n, _) => Constant::Int(n),
         LitKind::Float(ref is, LitFloatType::Suffixed(fty)) => match fty {