def cond2sql_gen(value, default_table=None, table_is_esc=False,

    assume_col=False):

    '''Converts old-style (tuple-based) conditions to sql_gen-compatible values.

    @param table_is_esc If False, assumes any table name is not escaped or that

        re-escaping it will produce the same value.

    '''

    if isinstance(value, ValueCond): return value # already in sql_gen form

    return as_ValueCond(value2sql_gen(value, default_table, table_is_esc,

        assume_col))