VarExprAST.py revision 6657
16657Snate@binkert.org# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood 26657Snate@binkert.org# Copyright (c) 2009 The Hewlett-Packard Development Company 36657Snate@binkert.org# All rights reserved. 46657Snate@binkert.org# 56657Snate@binkert.org# Redistribution and use in source and binary forms, with or without 66657Snate@binkert.org# modification, are permitted provided that the following conditions are 76657Snate@binkert.org# met: redistributions of source code must retain the above copyright 86657Snate@binkert.org# notice, this list of conditions and the following disclaimer; 96657Snate@binkert.org# redistributions in binary form must reproduce the above copyright 106657Snate@binkert.org# notice, this list of conditions and the following disclaimer in the 116657Snate@binkert.org# documentation and/or other materials provided with the distribution; 126657Snate@binkert.org# neither the name of the copyright holders nor the names of its 136657Snate@binkert.org# contributors may be used to endorse or promote products derived from 146657Snate@binkert.org# this software without specific prior written permission. 156657Snate@binkert.org# 166657Snate@binkert.org# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 176657Snate@binkert.org# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 186657Snate@binkert.org# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 196657Snate@binkert.org# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 206657Snate@binkert.org# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 216657Snate@binkert.org# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 226657Snate@binkert.org# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 236657Snate@binkert.org# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 246657Snate@binkert.org# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 256657Snate@binkert.org# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 266657Snate@binkert.org# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 276657Snate@binkert.org 286657Snate@binkert.orgfrom slicc.ast.ExprAST import ExprAST 296657Snate@binkert.orgfrom slicc.symbols import Type, Var 306657Snate@binkert.org 316657Snate@binkert.orgclass VarExprAST(ExprAST): 326657Snate@binkert.org def __init__(self, slicc, var): 336657Snate@binkert.org super(VarExprAST, self).__init__(slicc) 346657Snate@binkert.org self._var = var 356657Snate@binkert.org 366657Snate@binkert.org def __repr__(self): 376657Snate@binkert.org return "[VarExprAST: %r]" % self._var 386657Snate@binkert.org 396657Snate@binkert.org @property 406657Snate@binkert.org def name(self): 416657Snate@binkert.org return str(self._var) 426657Snate@binkert.org 436657Snate@binkert.org @property 446657Snate@binkert.org def var(self): 456657Snate@binkert.org var = self.symtab.find(self._var, Var) 466657Snate@binkert.org if not var: 476657Snate@binkert.org self.error("Unrecognized variable: %s", self._var) 486657Snate@binkert.org return var 496657Snate@binkert.org 506657Snate@binkert.org def assertType(self, type_ident): 516657Snate@binkert.org expected_type = self.symtab.find(type_ident, Type) 526657Snate@binkert.org 536657Snate@binkert.org if not expected_type: 546657Snate@binkert.org self.error("There must be a type '%s' declared in this scope", 556657Snate@binkert.org type_ident) 566657Snate@binkert.org 576657Snate@binkert.org if self.var.type != expected_type: 586657Snate@binkert.org self.error("Incorrect type: " + \ 596657Snate@binkert.org "'%s' is expected to be type '%s' not '%s'", 606657Snate@binkert.org self.var.ident, expected_type, self.var.type) 616657Snate@binkert.org 626657Snate@binkert.org def generate(self, code): 636657Snate@binkert.org fix = code.nofix() 646657Snate@binkert.org code("${{self.var.code}}") 656657Snate@binkert.org code.fix(fix) 666657Snate@binkert.org return self.var.type 67