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Diffstat (limited to 'src/mem/slicc/ast/ReturnStatementAST.py')
-rw-r--r-- | src/mem/slicc/ast/ReturnStatementAST.py | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/mem/slicc/ast/ReturnStatementAST.py b/src/mem/slicc/ast/ReturnStatementAST.py new file mode 100644 index 000000000..f1aff1c32 --- /dev/null +++ b/src/mem/slicc/ast/ReturnStatementAST.py @@ -0,0 +1,54 @@ +# 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 + +class ReturnStatementAST(StatementAST): + def __init__(self, slicc, expr_ast): + super(ReturnStatementAST, self).__init__(slicc) + + self.expr_ast = expr_ast + + def __repr__(self): + return "[ReturnStatementAST: %r]" % self.expr_ast + + def generate(self, code, return_type): + actual_type, ecode = self.expr_ast.inline(True) + code('return $ecode;') + + # Is return valid here? + if return_type is None: + self.error("Invalid 'return' statement") + + # The return type must match + if return_type != actual_type: + self.expr_ast.error("Return type miss-match, expected return " + + "type is '%s', actual is '%s'", + return_type, actual_type) + + def findResources(self, resources): + self.expr_ast.findResources(resources) |