| # 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) |
