src/mem/slicc/ast/ReturnStatementAST.py

# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
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# redistributions in binary form must reproduce the above copyright
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# this software without specific prior written permission.
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from slicc.ast.StatementAST import StatementAST

class ReturnStatementAST(StatementAST):
    def __init__(self, slicc, expr_ast):
        super().__init__(slicc)

        self.expr_ast = expr_ast

    def __repr__(self):
        return "[ReturnStatementAST: %r]" % self.expr_ast

    def generate(self, code, return_type, **kwargs):
        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 actual_type != "OOD" and 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)