Auto merge of rust-lang#12049 - cocodery:fix/issue#11243, r=Alexendoo

fix/issue#11243: allow 3-digit-grouped binary in non_octal_unix_permissions

fixes [Issue#11243](rust-lang/rust-clippy#11243)

Issue#11243 suggest lint `non_octal_unix_permissions` should not report binary format literal unix permissions as an error, and we think binary format is a good way to understand these permissions.

To solve this problem, we need to add check for binary literal, which is written in function `check_binary_unix_permissions` , only `binary, 3 groups and each group length equals to 3` is a legal format.

changelog: [`non_octal_unix_permissions`]: Add check for binary format literal unix permissions like 0b111_111_111

Author: bors

clippy_lints/src/non_octal_unix_permissions.rs

@@ -53,14 +53,10 @@ impl<'tcx> LateLintPass<'tcx> for NonOctalUnixPermissions {
                             && cx.tcx.is_diagnostic_item(sym::FsPermissions, adt.did())))
                     && let ExprKind::Lit(_) = param.kind
                     && param.span.eq_ctxt(expr.span)
+                    && let Some(snip) = snippet_opt(cx, param.span)
+                    && !(snip.starts_with("0o") || snip.starts_with("0b"))
                 {
-                    let Some(snip) = snippet_opt(cx, param.span) else {
-                        return;
-                    };
-
-                    if !snip.starts_with("0o") {
-                        show_error(cx, param);
-                    }
+                    show_error(cx, param);
                 }
             },
             ExprKind::Call(func, [param]) => {
@@ -70,7 +66,7 @@ impl<'tcx> LateLintPass<'tcx> for NonOctalUnixPermissions {
                     && let ExprKind::Lit(_) = param.kind
                     && param.span.eq_ctxt(expr.span)
                     && let Some(snip) = snippet_opt(cx, param.span)
-                    && !snip.starts_with("0o")
+                    && !(snip.starts_with("0o") || snip.starts_with("0b"))
                 {
                     show_error(cx, param);
                 }

tests/ui/non_octal_unix_permissions.fixed

@@ -25,9 +25,13 @@ fn main() {
 
     permissions.set_mode(0o644);
     permissions.set_mode(0o704);
+    // no error
+    permissions.set_mode(0b111_000_100);
 
     // DirBuilderExt::mode
     let mut builder = DirBuilder::new();
     builder.mode(0o755);
     builder.mode(0o406);
+    // no error
+    permissions.set_mode(0b111000100);
 }

tests/ui/non_octal_unix_permissions.rs

@@ -25,9 +25,13 @@ fn main() {
 
     permissions.set_mode(644);
     permissions.set_mode(0o704);
+    // no error
+    permissions.set_mode(0b111_000_100);
 
     // DirBuilderExt::mode
     let mut builder = DirBuilder::new();
     builder.mode(755);
     builder.mode(0o406);
+    // no error
+    permissions.set_mode(0b111000100);
 }

tests/ui/non_octal_unix_permissions.stderr

@@ -20,7 +20,7 @@ LL |     permissions.set_mode(644);
    |                          ^^^ help: consider using an octal literal instead: `0o644`
 
 error: using a non-octal value to set unix file permissions
-  --> $DIR/non_octal_unix_permissions.rs:31:18
+  --> $DIR/non_octal_unix_permissions.rs:33:18
    |
 LL |     builder.mode(755);
    |                  ^^^ help: consider using an octal literal instead: `0o755`