diff options
Diffstat (limited to 'cmd2/parsing.py')
| -rw-r--r-- | cmd2/parsing.py | 77 |
1 files changed, 37 insertions, 40 deletions
diff --git a/cmd2/parsing.py b/cmd2/parsing.py index 326ef08d..8b25684a 100644 --- a/cmd2/parsing.py +++ b/cmd2/parsing.py @@ -25,36 +25,9 @@ class Statement(str): The string portion of the class contains the arguments, but not the command, nor the output redirection clauses. - - :var raw: string containing exactly what we input by the user - :type raw: str - :var command: the command, i.e. the first whitespace delimited word - :type command: str - :var multiline_command: if the command is a multiline command, the name of the - command, otherwise empty - :type command: str - :var arg_list: list of arguments to the command, not including any output - redirection or terminators. quoted arguments remain - quoted. - :type arg_list: list - :var terminator: the character which terminated the multiline command, if - there was one - :type terminator: str - :var suffix: characters appearing after the terminator but before output - redirection, if any - :type suffix: str - :var pipe_to: if output was piped to a shell command, the shell command - as a list of tokens - :type pipe_to: list - :var output: if output was redirected, the redirection token, i.e. '>>' - :type output: str - :var output_to: if output was redirected, the destination file - :type output_to: str - """ def __new__(cls, - obj: object, - *, + value: str, raw: str = '', command: str = '', arg_list: List[str] = None, @@ -65,25 +38,49 @@ class Statement(str): output: str = '', output_to: str = '' ): + """ + :param value: The arguments, but not the command, nor the output redirection clauses. + :param raw: string containing exactly what we input by the user + :param command: the command, i.e. the first whitespace delimited word + :param arg_list: list of arguments to the command, not including any output + redirection or terminators. quoted arguments remain quoted. + :param multiline_command: if the command is a multiline command, the name of the + command, otherwise empty + :param terminator: the character which terminated the multiline command, if + there was one + :param suffix: characters appearing after the terminator but before output redirection, if any + :param pipe_to: if output was piped to a shell command, the shell command as a list of tokens + :param output: if output was redirected, the redirection token, i.e. '>>' + :param output_to: if output was redirected, the destination file + """ """Create a new instance of Statement We must override __new__ because we are subclassing `str` which is immutable. """ - stmt = str.__new__(cls, obj) - object.__setattr__(stmt, "raw", raw) - object.__setattr__(stmt, "command", command) + stmt = super().__new__(cls, value) + stmt.raw = raw + stmt.command = command + if arg_list is None: arg_list = [] - object.__setattr__(stmt, "arg_list", arg_list) - object.__setattr__(stmt, "multiline_command", multiline_command) - object.__setattr__(stmt, "terminator", terminator) - object.__setattr__(stmt, "suffix", suffix) + stmt.arg_list = arg_list + + stmt.multiline_command = multiline_command + stmt.terminator = terminator + stmt.suffix = suffix + if pipe_to is None: pipe_to = [] - object.__setattr__(stmt, "pipe_to", pipe_to) - object.__setattr__(stmt, "output", output) - object.__setattr__(stmt, "output_to", output_to) + stmt.pipe_to = pipe_to + + stmt.output = output + stmt.output_to = output_to + + # Make Statement feel immutable by overriding these functions + stmt.__setattr__ = stmt.__stmt_setattr__ + stmt.__delattr__ = stmt.__stmt_delattr__ + return stmt @property @@ -123,11 +120,11 @@ class Statement(str): return rtn - def __setattr__(self, name, value): + def __stmt_setattr__(self, name, value): """Statement instances should feel immutable; raise ValueError""" raise ValueError - def __delattr__(self, name): + def __stmt_delattr__(self, name): """Statement instances should feel immutable; raise ValueError""" raise ValueError |