1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
2# Copyright (c) 2009 The Hewlett-Packard Development Company
3# Copyright (c) 2013 Advanced Micro Devices, Inc.
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
8# met: redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer;
10# redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution;
13# neither the name of the copyright holders nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29from slicc.ast.StatementAST import StatementAST
30from slicc.ast.LocalVariableAST import LocalVariableAST
31from slicc.symbols import Type
32
33class ExprStatementAST(StatementAST):
34    def __init__(self, slicc, expr):
35        super(ExprStatementAST, self).__init__(slicc)
36        self.expr = expr
37
38    def __repr__(self):
39        return "[ExprStatementAST: %s]" % (self.expr)
40
41    def generate(self, code, return_type):
42        actual_type,rcode = self.expr.inline(True)
43        code("$rcode;")
44
45        # The return type must be void, except for local var decls
46        if (not isinstance(self.expr, LocalVariableAST) and
47            actual_type != self.symtab.find("void", Type)):
48            self.expr.warning("Non-void return ignored, " + \
49                "return type is '%s'", actual_type.ident)
50
51    def findResources(self, resources):
52        self.expr.findResources(resources)
53
54