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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.StatementAST import StatementAST
from slicc.symbols import Type
class IfStatementAST(StatementAST):
def __init__(self, slicc, cond, then, else_):
super(IfStatementAST, self).__init__(slicc)
assert cond is not None
assert then is not None
self.cond = cond
self.then = then
self.else_ = else_
def __repr__(self):
return "[IfStatement: %r%r%r]" % (self.cond, self.then, self.else_)
def generate(self, code, return_type):
cond_code = self.slicc.codeFormatter()
cond_type = self.cond.generate(cond_code)
if cond_type != self.symtab.find("bool", Type):
self.cond.error("Condition of if stmt must be bool, type was '%s'",
cond_type)
# Conditional
code.indent()
code('if ($cond_code) {')
# Then part
code.indent()
self.symtab.pushFrame()
self.then.generate(code, return_type)
self.symtab.popFrame()
code.dedent()
# Else part
if self.else_:
code('} else {')
code.indent()
self.symtab.pushFrame()
self.else_.generate(code, return_type)
self.symtab.popFrame()
code.dedent()
code('}') # End scope
def findResources(self, resources):
# Take a worse case look at both paths
self.then.findResources(resources)
if self.else_ is not None:
self.else_.findResources(resources)
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