RustPython · youknowone · Jun 22, 2025 · Jun 21, 2025 · Jun 21, 2025 · Jun 21, 2025
diff --git a/vm/src/builtins/str.rs b/vm/src/builtins/str.rs
@@ -528,7 +528,7 @@
             radd?.call((zelf,), vm)
         } else {
             Err(vm.new_type_error(format!(
-                "can only concatenate str (not \"{}\") to str",
+                r#"can only concatenate str (not "{}") to str"#,
                 other.class().name()
             )))
         }
@@ -570,11 +570,12 @@
             hash => hash,
         }
     }
+
     #[cold]
     fn _compute_hash(&self, vm: &VirtualMachine) -> hash::PyHash {
         let hash_val = vm.state.hash_secret.hash_bytes(self.as_bytes());
        debug_assert_ne!(hash_val, hash::SENTINEL);
        // like with char_len, we don't need a cmpxchg loop, since it'll always be the same value
        self.hash.store(hash_val, atomic::Ordering::Relaxed);
        hash_val
    }
@@ -583,6 +584,7 @@
     pub fn byte_len(&self) -> usize {
         self.data.len()
     }
+
     #[inline]
     pub fn is_empty(&self) -> bool {
         self.data.is_empty()
@@ -1439,6 +1441,7 @@
 struct CharLenStr<'a>(&'a str, usize);
 impl std::ops::Deref for CharLenStr<'_> {
     type Target = str;
+
     fn deref(&self) -> &Self::Target {
         self.0
     }
@@ -1852,6 +1855,7 @@
     fn as_ref(&self) -> Option<&Wtf8> {
         Some(self.as_wtf8())
     }
+
     fn is_empty(&self) -> bool {
         self.data.is_empty()
     }
@@ -1861,6 +1865,7 @@
     fn as_ref(&self) -> Option<&str> {
         self.data.as_str()
     }
+
     fn is_empty(&self) -> bool {
         self.data.is_empty()
     }
@@ -1870,6 +1875,7 @@
     fn as_ref(&self) -> Option<&AsciiStr> {
         self.data.as_ascii()
     }
+
     fn is_empty(&self) -> bool {
         self.data.is_empty()
     }
@@ -1893,9 +1899,11 @@
     fn is_lowercase(self) -> bool {
         self.is_lowercase()
     }
+
     fn is_uppercase(self) -> bool {
         self.is_uppercase()
     }
+
     fn bytes_len(self) -> usize {
         self.len_utf8()
     }
@@ -2122,9 +2130,11 @@
     fn is_lowercase(self) -> bool {
         self.is_lowercase()
     }
+
     fn is_uppercase(self) -> bool {
         self.is_uppercase()
     }
+
     fn bytes_len(self) -> usize {
         1
     }
@@ -2250,8 +2260,8 @@
            ("Format This As Title String", "fOrMaT thIs aS titLe String"),
            ("Format,This-As*Title;String", "fOrMaT,thIs-aS*titLe;String"),
            ("Getint", "getInt"),
            ("Greek Ωppercases ...", "greek ωppercases ..."),
            ("Greek ῼitlecases ...", "greek ῳitlecases ..."),
        ];
        for (title, input) in tests {
            assert_eq!(PyStr::from(input).title().as_str(), Ok(title));
@@ -2265,8 +2275,8 @@
            "A Titlecased Line",
            "A\nTitlecased Line",
            "A Titlecased, Line",
            "Greek Ωppercases ...",
            "Greek ῼitlecases ...",
        ];

        for s in pos {

diff --git a/vm/src/function/argument.rs b/vm/src/function/argument.rs
@@ -118,8 +118,8 @@
    {
        // last `kwarg_names.len()` elements of args in order of appearance in the call signature
        let total_argc = args.len();
        let kwargc = kwarg_names.len();
        let posargc = total_argc - kwargc;

        let posargs = args.by_ref().take(posargc).collect();

@@ -302,12 +302,14 @@
     type Inner: TryFromObject;
     fn from_inner(x: Self::Inner) -> Self;
 }
+
 impl<T: TryFromObject> FromArgOptional for OptionalArg<T> {
     type Inner = T;
     fn from_inner(x: T) -> Self {
         Self::Present(x)
     }
 }
+
 impl<T: TryFromObject> FromArgOptional for T {
     type Inner = Self;
     fn from_inner(x: Self) -> Self {
@@ -342,7 +344,7 @@
 }
 
 impl<T> KwArgs<T> {
-    pub fn new(map: IndexMap<String, T>) -> Self {
+    pub const fn new(map: IndexMap<String, T>) -> Self {
         KwArgs(map)
     }
 
@@ -354,11 +356,13 @@
         self.0.is_empty()
     }
 }
+
 impl<T> FromIterator<(String, T)> for KwArgs<T> {
     fn from_iter<I: IntoIterator<Item = (String, T)>>(iter: I) -> Self {
         KwArgs(iter.into_iter().collect())
     }
 }
+
 impl<T> Default for KwArgs<T> {
     fn default() -> Self {
         KwArgs(IndexMap::new())
@@ -408,7 +412,7 @@
 }
 
 impl<T> PosArgs<T> {
-    pub fn new(args: Vec<T>) -> Self {
+    pub const fn new(args: Vec<T>) -> Self {
         Self(args)
     }
 

diff --git a/vm/src/function/buffer.rs b/vm/src/function/buffer.rs
@@ -51,11 +51,11 @@ impl ArgBytesLike {
         f(&self.borrow_buf())
     }
 
-    pub fn len(&self) -> usize {
+    pub const fn len(&self) -> usize {
         self.0.desc.len
     }
 
-    pub fn is_empty(&self) -> bool {
+    pub const fn is_empty(&self) -> bool {
         self.len() == 0
     }
 
@@ -103,11 +103,11 @@ impl ArgMemoryBuffer {
         f(&mut self.borrow_buf_mut())
     }
 
-    pub fn len(&self) -> usize {
+    pub const fn len(&self) -> usize {
         self.0.desc.len
     }
 
-    pub fn is_empty(&self) -> bool {
+    pub const fn is_empty(&self) -> bool {
         self.len() == 0
     }
 }

diff --git a/vm/src/object/core.rs b/vm/src/object/core.rs
@@ -491,6 +491,7 @@ pub struct PyObject(PyInner<Erased>);
 
 impl Deref for PyObjectRef {
     type Target = PyObject;
+
     #[inline(always)]
     fn deref(&self) -> &PyObject {
         unsafe { self.ptr.as_ref() }

diff --git a/vm/src/object/ext.rs b/vm/src/object/ext.rs
@@ -47,6 +47,7 @@ where
         fmt::Display::fmt(&**self, f)
     }
 }
+
 impl<T: fmt::Display> fmt::Display for Py<T>
 where
     T: PyObjectPayload + fmt::Display,
@@ -72,6 +73,7 @@ impl<T: PyPayload> PyExact<T> {
 
 impl<T: PyPayload> Deref for PyExact<T> {
     type Target = Py<T>;
+
     #[inline(always)]
     fn deref(&self) -> &Py<T> {
         &self.inner
@@ -108,6 +110,7 @@ impl<T: PyObjectPayload> AsRef<Py<T>> for PyExact<T> {
 
 impl<T: PyPayload> std::borrow::ToOwned for PyExact<T> {
     type Owned = PyRefExact<T>;
+
     fn to_owned(&self) -> Self::Owned {
         let owned = self.inner.to_owned();
         unsafe { PyRefExact::new_unchecked(owned) }
@@ -181,6 +184,7 @@ impl<T: PyPayload> TryFromObject for PyRefExact<T> {
 
 impl<T: PyPayload> Deref for PyRefExact<T> {
     type Target = PyExact<T>;
+
     #[inline(always)]
     fn deref(&self) -> &PyExact<T> {
         unsafe { PyExact::ref_unchecked(self.inner.deref()) }

diff --git a/vm/src/object/traverse.rs b/vm/src/object/traverse.rs
@@ -158,6 +158,7 @@ unsafe impl<A: Traverse> Traverse for (A,) {
         self.0.traverse(tracer_fn);
     }
 }
+
 trace_tuple!((A, 0), (B, 1));
 trace_tuple!((A, 0), (B, 1), (C, 2));
 trace_tuple!((A, 0), (B, 1), (C, 2), (D, 3));

diff --git a/vm/src/protocol/buffer.rs b/vm/src/protocol/buffer.rs
@@ -378,15 +378,10 @@
     }
 
     pub fn is_zero_in_shape(&self) -> bool {
-        for (shape, _, _) in self.dim_desc.iter().cloned() {
-            if shape == 0 {
-                return true;
-            }
-        }
-        false
+        self.dim_desc.iter().any(|(shape, _, _)| *shape == 0)
     }
 
     // TODO: support fortain order
 }

 pub trait BufferResizeGuard {

diff --git a/vm/src/protocol/iter.rs b/vm/src/protocol/iter.rs
@@ -107,6 +107,7 @@ where
     O: Borrow<PyObject>,
 {
     type Target = PyObject;
+
     #[inline(always)]
     fn deref(&self) -> &Self::Target {
         self.0.borrow()
@@ -242,7 +243,7 @@ impl<'a, T, O> PyIterIter<'a, T, O>
 where
     O: Borrow<PyObject>,
 {
-    pub fn new(vm: &'a VirtualMachine, obj: O, length_hint: Option<usize>) -> Self {
+    pub const fn new(vm: &'a VirtualMachine, obj: O, length_hint: Option<usize>) -> Self {
         Self {
             vm,
             obj,

diff --git a/vm/src/protocol/number.rs b/vm/src/protocol/number.rs
@@ -18,7 +18,7 @@ pub type PyNumberTernaryFunc = fn(&PyObject, &PyObject, &PyObject, &VirtualMachi
 
 impl PyObject {
     #[inline]
-    pub fn to_number(&self) -> PyNumber<'_> {
+    pub const fn to_number(&self) -> PyNumber<'_> {
         PyNumber(self)
     }
 
@@ -440,7 +440,7 @@ impl Deref for PyNumber<'_> {
 }
 
 impl<'a> PyNumber<'a> {
-    pub(crate) fn obj(self) -> &'a PyObject {
+    pub(crate) const fn obj(self) -> &'a PyObject {
         self.0
     }
 

diff --git a/vm/src/types/slot.rs b/vm/src/types/slot.rs
@@ -1116,7 +1116,7 @@ impl PyComparisonOp {
         }
     }
 
-    pub fn operator_token(self) -> &'static str {
+    pub const fn operator_token(self) -> &'static str {
         match self {
             Self::Lt => "<",
             Self::Le => "<=",