1# Copyright (c) 2009 Advanced Micro Devices, Inc.
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26
27from slicc.ast.ExprAST import ExprAST
28
29class StaticCastAST(ExprAST):
30    def __init__(self, slicc, type_ast, type_modifier, expr_ast):
31        super(StaticCastAST, self).__init__(slicc)
32
33        self.type_ast = type_ast
34        self.expr_ast = expr_ast
35        self.type_modifier = type_modifier
36
37    def __repr__(self):
38        return "[StaticCastAST: %r]" % self.expr_ast
39
40    def generate(self, code):
41        actual_type, ecode = self.expr_ast.inline(True)
42        if self.type_modifier == "pointer":
43            code('static_cast<${{self.type_ast.type.c_ident}} *>($ecode)')
44        else:
45            code('static_cast<${{self.type_ast.type.c_ident}} &>($ecode)')
46
47        if not "interface" in self.type_ast.type:
48            self.expr_ast.error("static cast only premitted for those types " \
49                                "that implement inherit an interface")
50
51        # The interface type should match
52        if str(actual_type) != str(self.type_ast.type["interface"]):
53            self.expr_ast.error("static cast miss-match, type is '%s'," \
54                                "but inherited type is '%s'",
55                                actual_type, self.type_ast.type["interface"])
56
57        return self.type_ast.type
58
59