fn skip_until(&mut self, ch: u8) {
        while self.current_char != ch {
            self.advance();
        }
    }
/// set parser to next occurence of given character
set parser to next occurence of given character
set parser to next occurence of given character
fn skip_until(&mut self, ch: u8) {
        while self.current_char != ch {
            self.advance();
        }
    }
fn skip_until ( & mut self , ch : u8 ) { while self . current_char != ch { self . advance ( ) ; } }
set parser to next occurence of given character
set parser to next occurence of given character
&mut self
ch
u8
&mut self
ch
u8