Method parse

IPython/utils/text.py:547–565

(self, fmt_string: str)

    )

    def parse(self, fmt_string: str) -> Iterator[Tuple[Any, Any, Any, Any]]:
        for literal_txt, field_name, format_spec, conversion in Formatter.parse(
            self, fmt_string
        ):
            # Find $foo patterns in the literal text.
            continue_from = 0
            txt = ""
            for m in self._dollar_pattern_ignore_single_quote.finditer(literal_txt):
                new_txt, new_field = m.group(1,2)
                # $$foo --> $foo
                if new_field.startswith("$"):
                    txt += new_txt + new_field
                else:
                    yield (txt + new_txt, new_field, "", None)
                    txt = ""
                continue_from = m.end()
            
            # Re-yield the {foo} style pattern
            yield (txt + literal_txt[continue_from:], field_name, format_spec, conversion)

    def __repr__(self) -> str:
        return "<DollarFormatter>"