StaticCastAST.py revision 6882:898047a3672c 
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
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8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
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13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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26
27from slicc.ast.ExprAST import ExprAST
28
29class StaticCastAST(ExprAST):
30    def __init__(self, slicc, type_ast, expr_ast):
31        super(StaticCastAST, self).__init__(slicc)
32
33        self.type_ast = type_ast
34        self.expr_ast = expr_ast
35
36    def __repr__(self):
37        return "[StaticCastAST: %r]" % self.expr_ast
38
39    def generate(self, code):
40        actual_type, ecode = self.expr_ast.inline(True)
41        code('static_cast<${{self.type_ast.type.c_ident}} &>($ecode)')
42
43        if not "interface" in self.type_ast.type:
44            self.expr_ast.error("static cast only premitted for those types " \
45                                "that implement inherit an interface")
46
47        # The interface type should match
48        if str(actual_type) != str(self.type_ast.type["interface"]):
49            self.expr_ast.error("static cast miss-match, type is '%s'," \
50                                "but inherited type is '%s'",
51                                actual_type, self.type_ast.type["interface"])
52
53        return self.type_ast.type
54
55