AST.py revision 9483 
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
2# Copyright (c) 2009 The Hewlett-Packard Development Company
3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;
9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
11# documentation and/or other materials provided with the distribution;
12# neither the name of the copyright holders nor the names of its
13# contributors may be used to endorse or promote products derived from
14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28from slicc.util import PairContainer, Location
29
30class AST(PairContainer):
31    def __init__(self, slicc, pairs=None):
32        self.slicc = slicc
33        self.location = slicc.currentLocation()
34        self.pairs = {}
35        if pairs:
36            self.pairs.update(getattr(pairs, "pairs", pairs))
37
38    @property
39    def symtab(self):
40        return self.slicc.symtab
41
42    @property
43    def state_machine(self):
44        return self.slicc.symtab.state_machine
45
46    def warning(self, message, *args):
47        self.location.warning(message, *args)
48
49    def error(self, message, *args):
50        self.location.error(message, *args)
51
52    def embedError(self, message, *args):
53        if args:
54            message = message % args
55        code = self.slicc.codeFormatter()
56        code('''
57panic("Runtime Error at ${{self.location}}: %s.\\n", $message);
58''')
59        return code
60