MethodCallExprAST.py revision 6690:4dc4e494e4d8 
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,
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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.ExprAST import ExprAST
31
32class MethodCallExprAST(ExprAST):
33    def __init__(self, slicc, proc_name, expr_ast_vec):
34        super(MethodCallExprAST, self).__init__(slicc)
35        self.proc_name = proc_name
36        self.expr_ast_vec = expr_ast_vec
37
38    def generate(self, code):
39        tmp = code_formatter()
40        paramTypes = []
41        for expr_ast in self.expr_ast_vec:
42            return_type = expr_ast.generate(tmp)
43            paramTypes.append(return_type)
44
45        obj_type, methodId, prefix = self.generate_prefix(paramTypes)
46
47        # generate code
48        params = []
49        for expr_ast in self.expr_ast_vec:
50            return_type,tcode = expr_ast.inline(True)
51            params.append(str(tcode))
52        fix = code.nofix()
53        code("$prefix${{self.proc_name}}(${{', '.join(params)}}))")
54        code.fix(fix)
55
56        # Verify that this is a method of the object
57        if methodId not in obj_type.methods:
58            self.error("Invalid method call: Type '%s' does not have a method '%s'",
59                       obj_type, methodId)
60
61        if len(self.expr_ast_vec) != \
62               len(obj_type.methods[methodId].param_types):
63            # Right number of parameters
64            self.error("Wrong number of parameters for function name: '%s', " + \
65                       "expected: , actual: ", proc_name,
66                  len(obj_type.methods[methodId].param_types),
67                  len(self.expr_ast_vec))
68
69        for actual_type, expected_type in \
70                zip(paramTypes, obj_type.methods[methodId].param_types):
71            if actual_type != expected_type:
72                self.error("Type mismatch: expected: %s actual: %s",
73                           expected_type, actual_type)
74
75        # Return the return type of the method
76        return obj_type.methods[methodId].return_type
77
78    def findResources(self, resources):
79        pass
80
81class MemberMethodCallExprAST(MethodCallExprAST):
82    def __init__(self, slicc, obj_expr_ast, proc_name, expr_ast_vec):
83        s = super(MemberMethodCallExprAST, self)
84        s.__init__(slicc, proc_name, expr_ast_vec)
85
86        self.obj_expr_ast = obj_expr_ast
87
88    def __repr__(self):
89        return "[MethodCallExpr: %r%r %r]" % (self.proc_name,
90                                              self.obj_expr_ast,
91                                              self.expr_ast_vec)
92    def generate_prefix(self, paramTypes):
93        code = code_formatter()
94
95        # member method call
96        obj_type = self.obj_expr_ast.generate(code)
97        methodId = obj_type.methodId(self.proc_name, paramTypes)
98
99        prefix = ""
100        return_type = obj_type.methods[methodId].return_type
101        if return_type.isInterface:
102            prefix = "static_cast<%s &>" % return_type.c_ident
103        prefix = "%s((%s)." % (prefix, code)
104
105        return obj_type, methodId, prefix
106
107
108class ClassMethodCallExprAST(MethodCallExprAST):
109    def __init__(self, slicc, type_ast, proc_name, expr_ast_vec):
110        s = super(ClassMethodCallExprAST, self)
111        s.__init__(slicc, proc_name, expr_ast_vec)
112
113        self.type_ast = type_ast
114
115    def __repr__(self):
116        return "[MethodCallExpr: %r %r]" % (self.proc_name, self.expr_ast_vec)
117
118    def generate_prefix(self, paramTypes):
119
120        # class method call
121        prefix = "(%s::" % self.type_ast
122        obj_type = self.type_ast.type
123        methodId = obj_type.methodId(self.proc_name, paramTypes)
124
125        return obj_type, methodId, prefix
126
127__all__ = [ "MemberMethodCallExprAST", "ClassMethodCallExprAST" ]
128