1 files changed, 66 insertions, 0 deletions
diff --git a/src/mem/slicc/ast/VarExprAST.py b/src/mem/slicc/ast/VarExprAST.py
new file mode 100644
index 000000000..ac440bb68
--- /dev/null
+++ b/src/mem/slicc/ast/VarExprAST.py
@@ -0,0 +1,66 @@
+# 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.ExprAST import ExprAST
+from slicc.symbols import Type, Var
+
+class VarExprAST(ExprAST):
+    def __init__(self, slicc, var):
+        super(VarExprAST, self).__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):
+        fix = code.nofix()
+        code("${{self.var.code}}")
+        code.fix(fix)
+        return self.var.type