3# All rights reserved.
4#
5# Redistribution and use in source and binary forms, with or without
6# modification, are permitted provided that the following conditions are
7# met: redistributions of source code must retain the above copyright
8# notice, this list of conditions and the following disclaimer;
9# redistributions in binary form must reproduce the above copyright
10# notice, this list of conditions and the following disclaimer in the
11# documentation and/or other materials provided with the distribution;
12# neither the name of the copyright holders nor the names of its
13# contributors may be used to endorse or promote products derived from
14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28from slicc.ast.ExprAST import ExprAST
29from slicc.symbols import Type, Var
30
31class VarExprAST(ExprAST):
32 def __init__(self, slicc, var):
33 super(VarExprAST, self).__init__(slicc)
34 self._var = var
35
36 def __repr__(self):
37 return "[VarExprAST: %r]" % self._var
38
39 @property
40 def name(self):
41 return str(self._var)
42
43 @property
44 def var(self):
45 var = self.symtab.find(self._var, Var)
46 if not var:
47 self.error("Unrecognized variable: %s", self._var)
48 return var
49
50 def assertType(self, type_ident):
51 expected_type = self.symtab.find(type_ident, Type)
52
53 if not expected_type:
54 self.error("There must be a type '%s' declared in this scope",
55 type_ident)
56
57 if self.var.type != expected_type:
58 self.error("Incorrect type: " + \
59 "'%s' is expected to be type '%s' not '%s'",
60 self.var.ident, expected_type, self.var.type)
61
62 def generate(self, code):
63 fix = code.nofix()
64 code("${{self.var.code}}")
65 code.fix(fix)
66 return self.var.type
| 4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are
8# met: redistributions of source code must retain the above copyright
9# notice, this list of conditions and the following disclaimer;
10# redistributions in binary form must reproduce the above copyright
11# notice, this list of conditions and the following disclaimer in the
12# documentation and/or other materials provided with the distribution;
13# neither the name of the copyright holders nor the names of its
14# contributors may be used to endorse or promote products derived from
15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29from slicc.ast.ExprAST import ExprAST
30from slicc.symbols import Type, Var
31
32class VarExprAST(ExprAST):
33 def __init__(self, slicc, var):
34 super(VarExprAST, self).__init__(slicc)
35 self._var = var
36
37 def __repr__(self):
38 return "[VarExprAST: %r]" % self._var
39
40 @property
41 def name(self):
42 return str(self._var)
43
44 @property
45 def var(self):
46 var = self.symtab.find(self._var, Var)
47 if not var:
48 self.error("Unrecognized variable: %s", self._var)
49 return var
50
51 def assertType(self, type_ident):
52 expected_type = self.symtab.find(type_ident, Type)
53
54 if not expected_type:
55 self.error("There must be a type '%s' declared in this scope",
56 type_ident)
57
58 if self.var.type != expected_type:
59 self.error("Incorrect type: " + \
60 "'%s' is expected to be type '%s' not '%s'",
61 self.var.ident, expected_type, self.var.type)
62
63 def generate(self, code):
64 fix = code.nofix()
65 code("${{self.var.code}}")
66 code.fix(fix)
67 return self.var.type
|