Class StdString

cpp/gdb_arrow.py:458–496

A `std::string` (or possibly `std::string_view`) value.

class StdString:
    """
    A `std::string` (or possibly `std::string_view`) value.
    """

    def __init__(self, val):
        self.val = val
        try:
            # libstdc++ internals
            self._data = val['_M_dataplus']['_M_p']
            self._size = val['_M_string_length']
        except gdb.error:
            # fallback for other C++ standard libraries
            self._data = gdb.parse_and_eval(f"{for_evaluation(val)}.c_str()")
            self._size = gdb.parse_and_eval(f"{for_evaluation(val)}.size()")

    def __bool__(self):
        return self._size != 0

    @property
    def data(self):
        return self._data

    @property
    def size(self):
        return self._size

    def bytes_literal(self):
        return self._data.lazy_string(length=self._size).value()

    def string_literal(self):
        # XXX use lazy_string() as well?
        return string_literal(self._data)

    def string(self):
        return self._data.string()

    def __format__(self, fmt):
        return str(self.bytes_literal())


class StdVector(Sequence):