ExprStatementAST.py revision 6999:f226c098c393 
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 slicc.ast.StatementAST import StatementAST
29from slicc.symbols import Type
30
31class ExprStatementAST(StatementAST):
32    def __init__(self, slicc, expr):
33        super(ExprStatementAST, self).__init__(slicc)
34        self.expr = expr
35
36    def __repr__(self):
37        return "[ExprStatementAST: %s]" % (self.expr)
38
39    def generate(self, code, return_type):
40        actual_type,rcode = self.expr.inline(True)
41        code("$rcode;")
42
43        # The return type must be void
44        if actual_type != self.symtab.find("void", Type):
45            self.expr.error("Non-void return must not be ignored, " + \
46                            "return type is '%s'", actual_type.ident)
47
48    def findResources(self, resources):
49        self.expr.findResources(resources)
50
51