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Current Path: /usr/lib64/python2.6/lib2to3/pgen2

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📁 ..
📄 __init__.py(143 B)
📄 __init__.pyc(174 B)
📄 __init__.pyo(174 B)
📄 conv.py(9.4 KB)
📄 conv.pyc(8.01 KB)
📄 conv.pyo(6.91 KB)
📄 driver.py(4.75 KB)
📄 driver.pyc(4.99 KB)
📄 driver.pyo(4.93 KB)
📄 grammar.py(5.25 KB)
📄 grammar.pyc(5.89 KB)
📄 grammar.pyo(5.89 KB)
📄 literals.py(1.58 KB)
📄 literals.pyc(1.99 KB)
📄 literals.pyo(1.76 KB)
📄 parse.py(7.86 KB)
📄 parse.pyc(7.1 KB)
📄 parse.pyo(7.06 KB)
📄 pgen.py(13.46 KB)
📄 pgen.pyc(12.05 KB)
📄 pgen.pyo(11.45 KB)
📄 token.py(1.22 KB)
📄 token.pyc(2.23 KB)
📄 token.pyo(2.23 KB)
📄 tokenize.py(18.66 KB)
📄 tokenize.pyc(16.63 KB)
📄 tokenize.pyo(16.54 KB)

Editing: driver.py

# Copyright 2004-2005 Elemental Security, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.

# Modifications:
# Copyright 2006 Google, Inc. All Rights Reserved.
# Licensed to PSF under a Contributor Agreement.

"""Parser driver.

This provides a high-level interface to parse a file into a syntax tree.

"""

__author__ = "Guido van Rossum <guido@python.org>"

__all__ = ["Driver", "load_grammar"]

# Python imports
import codecs
import os
import logging
import sys

# Pgen imports
from . import grammar, parse, token, tokenize, pgen

class Driver(object):

def __init__(self, grammar, convert=None, logger=None):
        self.grammar = grammar
        if logger is None:
            logger = logging.getLogger()
        self.logger = logger
        self.convert = convert

def parse_tokens(self, tokens, debug=False):
        """Parse a series of tokens and return the syntax tree."""
        # XXX Move the prefix computation into a wrapper around tokenize.
        p = parse.Parser(self.grammar, self.convert)
        p.setup()
        lineno = 1
        column = 0
        type = value = start = end = line_text = None
        prefix = u""
        for quintuple in tokens:
            type, value, start, end, line_text = quintuple
            if start != (lineno, column):
                assert (lineno, column) <= start, ((lineno, column), start)
                s_lineno, s_column = start
                if lineno < s_lineno:
                    prefix += "\n" * (s_lineno - lineno)
                    lineno = s_lineno
                    column = 0
                if column < s_column:
                    prefix += line_text[column:s_column]
                    column = s_column
            if type in (tokenize.COMMENT, tokenize.NL):
                prefix += value
                lineno, column = end
                if value.endswith("\n"):
                    lineno += 1
                    column = 0
                continue
            if type == token.OP:
                type = grammar.opmap[value]
            if debug:
                self.logger.debug("%s %r (prefix=%r)",
                                  token.tok_name[type], value, prefix)
            if p.addtoken(type, value, (prefix, start)):
                if debug:
                    self.logger.debug("Stop.")
                break
            prefix = ""
            lineno, column = end
            if value.endswith("\n"):
                lineno += 1
                column = 0
        else:
            # We never broke out -- EOF is too soon (how can this happen???)
            raise parse.ParseError("incomplete input",
                                   type, value, (prefix, start))
        return p.rootnode

def parse_stream_raw(self, stream, debug=False):
        """Parse a stream and return the syntax tree."""
        tokens = tokenize.generate_tokens(stream.readline)
        return self.parse_tokens(tokens, debug)

def parse_stream(self, stream, debug=False):
        """Parse a stream and return the syntax tree."""
        return self.parse_stream_raw(stream, debug)

def parse_file(self, filename, encoding=None, debug=False):
        """Parse a file and return the syntax tree."""
        stream = codecs.open(filename, "r", encoding)
        try:
            return self.parse_stream(stream, debug)
        finally:
            stream.close()

def parse_string(self, text, debug=False):
        """Parse a string and return the syntax tree."""
        tokens = tokenize.generate_tokens(generate_lines(text).next)
        return self.parse_tokens(tokens, debug)

def generate_lines(text):
    """Generator that behaves like readline without using StringIO."""
    for line in text.splitlines(True):
        yield line
    while True:
        yield ""

def load_grammar(gt="Grammar.txt", gp=None,
                 save=True, force=False, logger=None):
    """Load the grammar (maybe from a pickle)."""
    if logger is None:
        logger = logging.getLogger()
    if gp is None:
        head, tail = os.path.splitext(gt)
        if tail == ".txt":
            tail = ""
        gp = head + tail + ".".join(map(str, sys.version_info)) + ".pickle"
    if force or not _newer(gp, gt):
        logger.info("Generating grammar tables from %s", gt)
        g = pgen.generate_grammar(gt)
        if save:
            logger.info("Writing grammar tables to %s", gp)
            try:
                g.dump(gp)
            except IOError, e:
                logger.info("Writing failed:"+str(e))
    else:
        g = grammar.Grammar()
        g.load(gp)
    return g

def _newer(a, b):
    """Inquire whether file a was written since file b."""
    if not os.path.exists(a):
        return False
    if not os.path.exists(b):
        return True
    return os.path.getmtime(a) >= os.path.getmtime(b)

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Editing: driver.py

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