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# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from slicc.ast.ExprAST import ExprAST
class MethodCallExprAST(ExprAST):
def __init__(self, slicc, proc_name, expr_ast_vec):
super(MethodCallExprAST, self).__init__(slicc)
self.proc_name = proc_name
self.expr_ast_vec = expr_ast_vec
def generate(self, code):
tmp = self.slicc.codeFormatter()
paramTypes = []
for expr_ast in self.expr_ast_vec:
return_type = expr_ast.generate(tmp)
paramTypes.append(return_type)
obj_type, methodId, prefix = self.generate_prefix(paramTypes)
# generate code
params = []
for expr_ast in self.expr_ast_vec:
return_type,tcode = expr_ast.inline(True)
params.append(str(tcode))
fix = code.nofix()
code("$prefix${{self.proc_name}}(${{', '.join(params)}}))")
code.fix(fix)
# Verify that this is a method of the object
if methodId not in obj_type.methods:
self.error("Invalid method call: Type '%s' does not have a method '%s'",
obj_type, methodId)
func = obj_type.methods[methodId]
func.checkArguments(self.expr_ast_vec)
# Return the return type of the method
return obj_type.methods[methodId].return_type
def findResources(self, resources):
pass
class MemberMethodCallExprAST(MethodCallExprAST):
def __init__(self, slicc, obj_expr_ast, func_call):
s = super(MemberMethodCallExprAST, self)
s.__init__(slicc, func_call.proc_name, func_call.exprs)
self.obj_expr_ast = obj_expr_ast
def __repr__(self):
return "[MethodCallExpr: %r%r %r]" % (self.proc_name,
self.obj_expr_ast,
self.expr_ast_vec)
def generate_prefix(self, paramTypes):
code = self.slicc.codeFormatter()
# member method call
obj_type = self.obj_expr_ast.generate(code)
methodId = obj_type.methodId(self.proc_name, paramTypes)
prefix = ""
implements_interface = False
if methodId in obj_type.methods:
return_type = obj_type.methods[methodId].return_type
else:
#
# Check whether the method is implemented by the super class
if "interface" in obj_type:
interface_type = self.symtab.find(obj_type["interface"]);
if methodId in interface_type.methods:
return_type = interface_type.methods[methodId].return_type
obj_type = interface_type
else:
self.error("Invalid method call: " \
"Type '%s' does not have a method %s, '%s'",
obj_type, self.proc_name, methodId)
else:
#
# The initial method check has failed, but before generating an
# error we must check whether any of the paramTypes implement
# an interface. If so, we must check if the method ids using
# the inherited types exist.
#
# This code is a temporary fix and only checks for the methodId
# where all paramTypes are converted to their inherited type. The
# right way to do this is to replace slicc's simple string
# comparison for determining the correct overloaded method, with a
# more robust param by param check.
#
implemented_paramTypes = []
for paramType in paramTypes:
implemented_paramType = paramType
if paramType.isInterface:
implements_interface = True
implemented_paramType.abstract_ident = paramType["interface"]
else:
implemented_paramType.abstract_ident = paramType.c_ident
implemented_paramTypes.append(implemented_paramType)
implementedMethodId = ""
if implements_interface:
implementedMethodId = obj_type.methodIdAbstract(
self.proc_name, implemented_paramTypes)
if implementedMethodId not in obj_type.methods:
self.error("Invalid method call: Type '%s' " \
"does not have a method %s, '%s' nor '%s'",
obj_type, self.proc_name, methodId,
implementedMethodId)
# Replace the methodId with the implementedMethodId
# found in the method list.
methodId = implementedMethodId
return_type = obj_type.methods[methodId].return_type
if str(obj_type) == "AbstractCacheEntry" or \
str(obj_type) == "AbstractEntry" or \
("interface" in obj_type and (
obj_type["interface"] == "AbstractCacheEntry" or
obj_type["interface"] == "AbstractEntry")):
prefix = "%s((*(%s))." % (prefix, code)
else:
prefix = "%s((%s)." % (prefix, code)
return obj_type, methodId, prefix
class ClassMethodCallExprAST(MethodCallExprAST):
def __init__(self, slicc, type_ast, proc_name, expr_ast_vec):
s = super(ClassMethodCallExprAST, self)
s.__init__(slicc, proc_name, expr_ast_vec)
self.type_ast = type_ast
def __repr__(self):
return "[MethodCallExpr: %r %r]" % (self.proc_name, self.expr_ast_vec)
def generate_prefix(self, paramTypes):
# class method call
prefix = "(%s::" % self.type_ast
obj_type = self.type_ast.type
methodId = obj_type.methodId(self.proc_name, paramTypes)
return obj_type, methodId, prefix
__all__ = [ "MemberMethodCallExprAST", "ClassMethodCallExprAST" ]
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