67     pub fn print<W: fmt::Write>(&mut self, hir: &Hir, wtr: W) -> fmt::Result {  in print()
68         visitor::visit(hir, Writer { wtr })  in print()
74     wtr: W,  field
98                 self.wtr.write_str("[")?;  in visit_pre()
104                         self.wtr.write_str("-")?;  in visit_pre()
108                 self.wtr.write_str("]")?;  in visit_pre()
111                 self.wtr.write_str("(?-u:[")?;  in visit_pre()
117                         self.wtr.write_str("-")?;  in visit_pre()
121                 self.wtr.write_str("])")?;  in visit_pre()
124                 self.wtr.write_str("(?m:^)")?;  in visit_pre()
127                 self.wtr.write_str("(?m:$)")?;  in visit_pre()
130                 self.wtr.write_str(r"\A")?;  in visit_pre()
133                 self.wtr.write_str(r"\z")?;  in visit_pre()
136                 self.wtr.write_str(r"\b")?;  in visit_pre()
139                 self.wtr.write_str(r"\B")?;  in visit_pre()
142                 self.wtr.write_str(r"(?-u:\b)")?;  in visit_pre()
145                 self.wtr.write_str(r"(?-u:\B)")?;  in visit_pre()
149                     self.wtr.write_str("(")?;  in visit_pre()
152                     write!(self.wtr, "(?P<{}>", name)?;  in visit_pre()
155                     self.wtr.write_str("(?:")?;  in visit_pre()
175                         self.wtr.write_str("?")?;  in visit_post()
178                         self.wtr.write_str("*")?;  in visit_post()
181                         self.wtr.write_str("+")?;  in visit_post()
185                             write!(self.wtr, "{{{}}}", m)?;  in visit_post()
188                             write!(self.wtr, "{{{},}}", m)?;  in visit_post()
191                             write!(self.wtr, "{{{},{}}}", m, n)?;  in visit_post()
196                     self.wtr.write_str("?")?;  in visit_post()
200                 self.wtr.write_str(")")?;  in visit_post()
207         self.wtr.write_str("|")  in visit_alternation_in()
214             self.wtr.write_str("\\")?;  in write_literal_char()
216         self.wtr.write_char(c)  in write_literal_char()
224             write!(self.wtr, "(?-u:\\x{:02X})", b)
233             write!(self.wtr, "\\x{:02X}", b)