| # Copyright (c) 1999-2008 Mark D. Hill and David A. Wood |
| # Copyright (c) 2009 The Hewlett-Packard Development Company |
| # Copyright (c) 2013 Advanced Micro Devices, Inc. |
| # 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().__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, **kwargs): |
| fix = code.nofix() |
| code("${{self.var.code}}") |
| code.fix(fix) |
| return self.var.type |