OutPortDeclAST.py revision 6872:b26f60c254c1 
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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26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28from m5.util import code_formatter
29
30from slicc.ast.DeclAST import DeclAST
31from slicc.ast.TypeAST import TypeAST
32from slicc.symbols import Var
33from slicc.symbols import Type
34
35class OutPortDeclAST(DeclAST):
36    def __init__(self, slicc, ident, msg_type, var_expr, pairs):
37        super(OutPortDeclAST, self).__init__(slicc, pairs)
38
39        self.ident = ident
40        self.msg_type = msg_type
41        self.var_expr = var_expr
42        self.queue_type = TypeAST(slicc, "OutPort")
43
44    def __repr__(self):
45        return "[OutPortDecl: %r]" % self.ident
46
47    def generate(self):
48        code = code_formatter(newlines=False)
49
50        queue_type = self.var_expr.generate(code)
51        if not queue_type.isOutPort:
52            self.error("The outport queue's type must have the 'outport' " +
53                       "attribute.  Type '%s' does not have this attribute.",
54                       (queue_type))
55
56        if not self.symtab.find(self.msg_type.ident, Type):
57            self.error("The message type '%s' does not exist.",
58                       self.msg_type.ident)
59
60        var = Var(self.symtab, self.ident, self.location, self.queue_type.type,
61                  str(code), self.pairs)
62        self.symtab.newSymbol(var)
63