Changes to src/regex_helper.rs. All files

src/regex_helper.rs

@@ -3,36 +3,45 @@ use regex_syntax::hir::Hir;  /// Determine if a regex pattern contains a literal uppercase character. pub fn pattern_has_uppercase_char(pattern: &str) -> bool {-    let mut parser = ParserBuilder::new().utf8(false).build();--    parser+    // The HIR includes case-folded alternatives introduced by inline flags.+    // Smart case must consider the original literals, before case folding.+    regex_syntax::ast::parse::Parser::new()         .parse(pattern)-        .map(|hir| hir_has_uppercase_char(&hir))+        .map(|ast| regex_syntax::ast::visit(&ast, UppercaseVisitor(false)).unwrap_or(false))         .unwrap_or(false) } -/// Determine if a regex expression contains a literal uppercase character.-fn hir_has_uppercase_char(hir: &Hir) -> bool {-    use regex_syntax::hir::*;+struct UppercaseVisitor(bool); -    match hir.kind() {-        HirKind::Literal(Literal(bytes)) => match std::str::from_utf8(bytes) {-            Ok(s) => s.chars().any(|c| c.is_uppercase()),-            Err(_) => bytes.iter().any(|b| char::from(*b).is_uppercase()),-        },-        HirKind::Class(Class::Unicode(ranges)) => ranges-            .iter()-            .any(|r| r.start().is_uppercase() || r.end().is_uppercase()),-        HirKind::Class(Class::Bytes(ranges)) => ranges-            .iter()-            .any(|r| char::from(r.start()).is_uppercase() || char::from(r.end()).is_uppercase()),-        HirKind::Capture(Capture { sub, .. }) | HirKind::Repetition(Repetition { sub, .. }) => {-            hir_has_uppercase_char(sub)-        }-        HirKind::Concat(hirs) | HirKind::Alternation(hirs) => {-            hirs.iter().any(hir_has_uppercase_char)+impl regex_syntax::ast::Visitor for UppercaseVisitor {+    type Output = bool;+    type Err = std::convert::Infallible;++    fn finish(self) -> Result<bool, Self::Err> {+        Ok(self.0)+    }++    fn visit_pre(&mut self, ast: &regex_syntax::ast::Ast) -> Result<(), Self::Err> {+        if let regex_syntax::ast::Ast::Literal(literal) = ast {+            self.0 |= literal.c.is_uppercase();         }-        _ => false,+        Ok(())+    }++    fn visit_class_set_item_pre(+        &mut self,+        item: &regex_syntax::ast::ClassSetItem,+    ) -> Result<(), Self::Err> {+        use regex_syntax::ast::ClassSetItem;++        self.0 |= match item {+            ClassSetItem::Literal(literal) => literal.c.is_uppercase(),+            ClassSetItem::Range(range) => {+                range.start.c.is_uppercase() || range.end.c.is_uppercase()+            }+            _ => false,+        };+        Ok(())     } } @@ -103,3 +112,19 @@ fn matches_strings_with_leading_dot_simple() {     assert!(!pattern_matches_strings_with_leading_dot("\\.gitignore"));     assert!(!pattern_matches_strings_with_leading_dot("^gitignore")); }++#[test]+fn pattern_has_uppercase_char_inline_flags() {+    for pattern in [+        "(?i)foo",+        "(?i:foo)",+        "(?i)[a-z]",+        "(?i)[a-z&&[^q]]",+        "(?i)é",+    ] {+        assert!(!pattern_has_uppercase_char(pattern), "{pattern}");+    }+    for pattern in ["(?i)Foo", "(?i)[A-Z]", r"(?i)\x46oo", "(?i)É"] {+        assert!(pattern_has_uppercase_char(pattern), "{pattern}");+    }+}