unix-cpy: Remove unix-cpy. It's no longer needed.

unix-cpy was originally written to get semantic equivalent with CPython
without writing functional tests.  When writing the initial
implementation of uPy it was a long way between lexer and functional
tests, so the half-way test was to make sure that the bytecode was
correct.  The idea was that if the uPy bytecode matched CPython 1-1 then
uPy would be proper Python if the bytecodes acted correctly.  And having
matching bytecode meant that it was less likely to miss some deep
subtlety in the Python semantics that would require an architectural
change later on.

But that is all history and it no longer makes sense to retain the
ability to output CPython bytecode, because:

1. It outputs CPython 3.3 compatible bytecode.  CPython's bytecode
changes from version to version, and seems to have changed quite a bit
in 3.5.  There's no point in changing the bytecode output to match
CPython anymore.

2. uPy and CPy do different optimisations to the bytecode which makes it
harder to match.

3. The bytecode tests are not run.  They were never part of Travis and
are not run locally anymore.

4. The EMIT_CPYTHON option needs a lot of extra source code which adds
heaps of noise, especially in compile.c.

5. Now that there is an extensive test suite (which tests functionality)
there is no need to match the bytecode.  Some very subtle behaviour is
tested with the test suite and passing these tests is a much better
way to stay Python-language compliant, rather than trying to match
CPy bytecode.

1 files changed, 0 insertions, 374 deletions

diff --git a/tests/bytecode/pylib-tests/poplib.py b/tests/bytecode/pylib-tests/poplib.py
deleted file mode 100644
index d42d9dd32..000000000
--- a/tests/bytecode/pylib-tests/poplib.py
+++ /dev/null
@@ -1,374 +0,0 @@
-"""A POP3 client class.
-
-Based on the J. Myers POP3 draft, Jan. 96
-"""
-
-# Author: David Ascher <david_ascher@brown.edu>
-#         [heavily stealing from nntplib.py]
-# Updated: Piers Lauder <piers@cs.su.oz.au> [Jul '97]
-# String method conversion and test jig improvements by ESR, February 2001.
-# Added the POP3_SSL class. Methods loosely based on IMAP_SSL. Hector Urtubia <urtubia@mrbook.org> Aug 2003
-
-# Example (see the test function at the end of this file)
-
-# Imports
-
-import re, socket
-
-__all__ = ["POP3","error_proto"]
-
-# Exception raised when an error or invalid response is received:
-
-class error_proto(Exception): pass
-
-# Standard Port
-POP3_PORT = 110
-
-# POP SSL PORT
-POP3_SSL_PORT = 995
-
-# Line terminators (we always output CRLF, but accept any of CRLF, LFCR, LF)
-CR = b'\r'
-LF = b'\n'
-CRLF = CR+LF
-
-
-class POP3:
-
-    """This class supports both the minimal and optional command sets.
-    Arguments can be strings or integers (where appropriate)
-    (e.g.: retr(1) and retr('1') both work equally well.
-
-    Minimal Command Set:
-            USER name               user(name)
-            PASS string             pass_(string)
-            STAT                    stat()
-            LIST [msg]              list(msg = None)
-            RETR msg                retr(msg)
-            DELE msg                dele(msg)
-            NOOP                    noop()
-            RSET                    rset()
-            QUIT                    quit()
-
-    Optional Commands (some servers support these):
-            RPOP name               rpop(name)
-            APOP name digest        apop(name, digest)
-            TOP msg n               top(msg, n)
-            UIDL [msg]              uidl(msg = None)
-
-    Raises one exception: 'error_proto'.
-
-    Instantiate with:
-            POP3(hostname, port=110)
-
-    NB:     the POP protocol locks the mailbox from user
-            authorization until QUIT, so be sure to get in, suck
-            the messages, and quit, each time you access the
-            mailbox.
-
-            POP is a line-based protocol, which means large mail
-            messages consume lots of python cycles reading them
-            line-by-line.
-
-            If it's available on your mail server, use IMAP4
-            instead, it doesn't suffer from the two problems
-            above.
-    """
-
-    encoding = 'UTF-8'
-
-    def __init__(self, host, port=POP3_PORT,
-                 timeout=socket._GLOBAL_DEFAULT_TIMEOUT):
-        self.host = host
-        self.port = port
-        self.sock = self._create_socket(timeout)
-        self.file = self.sock.makefile('rb')
-        self._debugging = 0
-        self.welcome = self._getresp()
-
-    def _create_socket(self, timeout):
-        return socket.create_connection((self.host, self.port), timeout)
-
-    def _putline(self, line):
-        if self._debugging > 1: print('*put*', repr(line))
-        self.sock.sendall(line + CRLF)
-
-
-    # Internal: send one command to the server (through _putline())
-
-    def _putcmd(self, line):
-        if self._debugging: print('*cmd*', repr(line))
-        line = bytes(line, self.encoding)
-        self._putline(line)
-
-
-    # Internal: return one line from the server, stripping CRLF.
-    # This is where all the CPU time of this module is consumed.
-    # Raise error_proto('-ERR EOF') if the connection is closed.
-
-    def _getline(self):
-        line = self.file.readline()
-        if self._debugging > 1: print('*get*', repr(line))
-        if not line: raise error_proto('-ERR EOF')
-        octets = len(line)
-        # server can send any combination of CR & LF
-        # however, 'readline()' returns lines ending in LF
-        # so only possibilities are ...LF, ...CRLF, CR...LF
-        if line[-2:] == CRLF:
-            return line[:-2], octets
-        if line[0] == CR:
-            return line[1:-1], octets
-        return line[:-1], octets
-
-
-    # Internal: get a response from the server.
-    # Raise 'error_proto' if the response doesn't start with '+'.
-
-    def _getresp(self):
-        resp, o = self._getline()
-        if self._debugging > 1: print('*resp*', repr(resp))
-        if not resp.startswith(b'+'):
-            raise error_proto(resp)
-        return resp
-
-
-    # Internal: get a response plus following text from the server.
-
-    def _getlongresp(self):
-        resp = self._getresp()
-        list = []; octets = 0
-        line, o = self._getline()
-        while line != b'.':
-            if line.startswith(b'..'):
-                o = o-1
-                line = line[1:]
-            octets = octets + o
-            list.append(line)
-            line, o = self._getline()
-        return resp, list, octets
-
-
-    # Internal: send a command and get the response
-
-    def _shortcmd(self, line):
-        self._putcmd(line)
-        return self._getresp()
-
-
-    # Internal: send a command and get the response plus following text
-
-    def _longcmd(self, line):
-        self._putcmd(line)
-        return self._getlongresp()
-
-
-    # These can be useful:
-
-    def getwelcome(self):
-        return self.welcome
-
-
-    def set_debuglevel(self, level):
-        self._debugging = level
-
-
-    # Here are all the POP commands:
-
-    def user(self, user):
-        """Send user name, return response
-
-        (should indicate password required).
-        """
-        return self._shortcmd('USER %s' % user)
-
-
-    def pass_(self, pswd):
-        """Send password, return response
-
-        (response includes message count, mailbox size).
-
-        NB: mailbox is locked by server from here to 'quit()'
-        """
-        return self._shortcmd('PASS %s' % pswd)
-
-
-    def stat(self):
-        """Get mailbox status.
-
-        Result is tuple of 2 ints (message count, mailbox size)
-        """
-        retval = self._shortcmd('STAT')
-        rets = retval.split()
-        if self._debugging: print('*stat*', repr(rets))
-        numMessages = int(rets[1])
-        sizeMessages = int(rets[2])
-        return (numMessages, sizeMessages)
-
-
-    def list(self, which=None):
-        """Request listing, return result.
-
-        Result without a message number argument is in form
-        ['response', ['mesg_num octets', ...], octets].
-
-        Result when a message number argument is given is a
-        single response: the "scan listing" for that message.
-        """
-        if which is not None:
-            return self._shortcmd('LIST %s' % which)
-        return self._longcmd('LIST')
-
-
-    def retr(self, which):
-        """Retrieve whole message number 'which'.
-
-        Result is in form ['response', ['line', ...], octets].
-        """
-        return self._longcmd('RETR %s' % which)
-
-
-    def dele(self, which):
-        """Delete message number 'which'.
-
-        Result is 'response'.
-        """
-        return self._shortcmd('DELE %s' % which)
-
-
-    def noop(self):
-        """Does nothing.
-
-        One supposes the response indicates the server is alive.
-        """
-        return self._shortcmd('NOOP')
-
-
-    def rset(self):
-        """Unmark all messages marked for deletion."""
-        return self._shortcmd('RSET')
-
-
-    def quit(self):
-        """Signoff: commit changes on server, unlock mailbox, close connection."""
-        resp = self._shortcmd('QUIT')
-        self.close()
-        return resp
-
-    def close(self):
-        """Close the connection without assuming anything about it."""
-        if self.file is not None:
-            self.file.close()
-        if self.sock is not None:
-            self.sock.close()
-        self.file = self.sock = None
-
-    #__del__ = quit
-
-
-    # optional commands:
-
-    def rpop(self, user):
-        """Not sure what this does."""
-        return self._shortcmd('RPOP %s' % user)
-
-
-    timestamp = re.compile(br'\+OK.*(<[^>]+>)')
-
-    def apop(self, user, password):
-        """Authorisation
-
-        - only possible if server has supplied a timestamp in initial greeting.
-
-        Args:
-                user     - mailbox user;
-                password - mailbox password.
-
-        NB: mailbox is locked by server from here to 'quit()'
-        """
-        secret = bytes(password, self.encoding)
-        m = self.timestamp.match(self.welcome)
-        if not m:
-            raise error_proto('-ERR APOP not supported by server')
-        import hashlib
-        digest = m.group(1)+secret
-        digest = hashlib.md5(digest).hexdigest()
-        return self._shortcmd('APOP %s %s' % (user, digest))
-
-
-    def top(self, which, howmuch):
-        """Retrieve message header of message number 'which'
-        and first 'howmuch' lines of message body.
-
-        Result is in form ['response', ['line', ...], octets].
-        """
-        return self._longcmd('TOP %s %s' % (which, howmuch))
-
-
-    def uidl(self, which=None):
-        """Return message digest (unique id) list.
-
-        If 'which', result contains unique id for that message
-        in the form 'response mesgnum uid', otherwise result is
-        the list ['response', ['mesgnum uid', ...], octets]
-        """
-        if which is not None:
-            return self._shortcmd('UIDL %s' % which)
-        return self._longcmd('UIDL')
-
-try:
-    import ssl
-except ImportError:
-    pass
-else:
-
-    class POP3_SSL(POP3):
-        """POP3 client class over SSL connection
-
-        Instantiate with: POP3_SSL(hostname, port=995, keyfile=None, certfile=None)
-
-               hostname - the hostname of the pop3 over ssl server
-               port - port number
-               keyfile - PEM formatted file that countains your private key
-               certfile - PEM formatted certificate chain file
-
-        See the methods of the parent class POP3 for more documentation.
-        """
-
-        def __init__(self, host, port=POP3_SSL_PORT, keyfile=None, certfile=None,
-                     timeout=socket._GLOBAL_DEFAULT_TIMEOUT, context=None):
-            if context is not None and keyfile is not None:
-                raise ValueError("context and keyfile arguments are mutually "
-                                 "exclusive")
-            if context is not None and certfile is not None:
-                raise ValueError("context and certfile arguments are mutually "
-                                 "exclusive")
-            self.keyfile = keyfile
-            self.certfile = certfile
-            self.context = context
-            POP3.__init__(self, host, port, timeout)
-
-        def _create_socket(self, timeout):
-            sock = POP3._create_socket(self, timeout)
-            if self.context is not None:
-                sock = self.context.wrap_socket(sock)
-            else:
-                sock = ssl.wrap_socket(sock, self.keyfile, self.certfile)
-            return sock
-
-    __all__.append("POP3_SSL")
-
-if __name__ == "__main__":
-    import sys
-    a = POP3(sys.argv[1])
-    print(a.getwelcome())
-    a.user(sys.argv[2])
-    a.pass_(sys.argv[3])
-    a.list()
-    (numMsgs, totalSize) = a.stat()
-    for i in range(1, numMsgs + 1):
-        (header, msg, octets) = a.retr(i)
-        print("Message %d:" % i)
-        for line in msg:
-            print('   ' + line)
-        print('-----------------------')
-    a.quit()