Method char_at

regex/regex-syntax/src/ast/parse.rs:471–476

Return the character at the given position. This panics if the given position does not point to a valid char.

(&self, i: usize)

    ///
    /// This panics if the given position does not point to a valid char.
    fn char_at(&self, i: usize) -> char {
        self.pattern()[i..].chars().next()
            .unwrap_or_else(|| {
                panic!("expected char at offset {}", i)
            })
    }

    /// Bump the parser to the next Unicode scalar value.
    ///