Function for_evaluation

cpp/gdb_arrow.py:115–134

Return a parsable form of gdb.Value `val`, optionally with gdb.Type `ty`.

(val, ty=None)

def for_evaluation(val, ty=None):
    """
    Return a parsable form of gdb.Value `val`, optionally with gdb.Type `ty`.
    """
    if ty is None:
        ty = get_basic_type(val.type)
    typename = str(ty)  # `ty.name` is sometimes None...
    if '::' in typename and not typename.startswith('::'):
        # ARROW-15652: expressions evaluated by GDB are evaluated in the
        # scope of the C++ namespace of the currently selected frame.
        # When inside a Parquet frame, `arrow::<some type>` would be looked
        # up as `parquet::arrow::<some type>` and fail.
        # Therefore, force the lookup to happen in the global namespace scope.
        typename = f"::{typename}"
    if ty.code == gdb.TYPE_CODE_PTR:
        # It's already a pointer, can represent it directly
        return f"(({typename}) ({val}))"
    if val.address is None:
        raise ValueError(f"Cannot further evaluate rvalue: {val}")
    return f"(* ({typename}*) ({val.address}))"


def is_char_star(ty):