fn print_path()

in sgx_demangle/src/v0.rs [803:897]
78 lines of code
11 McCabe index (conditional complexity)

    fn print_path(&mut self, in_value: bool) -> fmt::Result {
        parse!(self, push_depth);

        let tag = parse!(self, next);
        match tag {
            b'C' => {
                let dis = parse!(self, disambiguator);
                let name = parse!(self, ident);

                self.print(name)?;
                if let Some(out) = &mut self.out {
                    if !out.alternate() {
                        out.write_str("[")?;
                        fmt::LowerHex::fmt(&dis, out)?;
                        out.write_str("]")?;
                    }
                }
            }
            b'N' => {
                let ns = parse!(self, namespace);

                self.print_path(in_value)?;

                // HACK(eddyb) if the parser is already marked as having errored,
                // `parse!` below will print a `?` without its preceding `::`
                // (because printing the `::` is skipped in certain conditions,
                // i.e. a lowercase namespace with an empty identifier),
                // so in order to get `::?`, the `::` has to be printed here.
                if self.parser.is_err() {
                    self.print("::")?;
                }

                let dis = parse!(self, disambiguator);
                let name = parse!(self, ident);

                match ns {
                    // Special namespaces, like closures and shims.
                    Some(ns) => {
                        self.print("::{")?;
                        match ns {
                            'C' => self.print("closure")?,
                            'S' => self.print("shim")?,
                            _ => self.print(ns)?,
                        }
                        if !name.ascii.is_empty() || !name.punycode.is_empty() {
                            self.print(":")?;
                            self.print(name)?;
                        }
                        self.print("#")?;
                        self.print(dis)?;
                        self.print("}")?;
                    }

                    // Implementation-specific/unspecified namespaces.
                    None => {
                        if !name.ascii.is_empty() || !name.punycode.is_empty() {
                            self.print("::")?;
                            self.print(name)?;
                        }
                    }
                }
            }
            b'M' | b'X' | b'Y' => {
                if tag != b'Y' {
                    // Ignore the `impl`'s own path.
                    parse!(self, disambiguator);
                    self.skipping_printing(|this| this.print_path(false));
                }

                self.print("<")?;
                self.print_type()?;
                if tag != b'M' {
                    self.print(" as ")?;
                    self.print_path(false)?;
                }
                self.print(">")?;
            }
            b'I' => {
                self.print_path(in_value)?;
                if in_value {
                    self.print("::")?;
                }
                self.print("<")?;
                self.print_sep_list(Self::print_generic_arg, ", ")?;
                self.print(">")?;
            }
            b'B' => {
                self.print_backref(|this| this.print_path(in_value))?;
            }
            _ => invalid!(self),
        }

        self.pop_depth();
        Ok(())
    }