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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
from slicc.symbols import Type, Var
class VarExprAST(ExprAST):
def __init__(self, slicc, var):
super(VarExprAST, self).__init__(slicc)
self._var = var
def __repr__(self):
return "[VarExprAST: %r]" % self._var
@property
def name(self):
return str(self._var)
@property
def var(self):
var = self.symtab.find(self._var, Var)
if not var:
self.error("Unrecognized variable: %s", self._var)
return var
def assertType(self, type_ident):
expected_type = self.symtab.find(type_ident, Type)
if not expected_type:
self.error("There must be a type '%s' declared in this scope",
type_ident)
if self.var.type != expected_type:
self.error("Incorrect type: " + \
"'%s' is expected to be type '%s' not '%s'",
self.var.ident, expected_type, self.var.type)
def generate(self, code):
fix = code.nofix()
code("${{self.var.code}}")
code.fix(fix)
return self.var.type
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