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builtin.py
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builtin.py
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#
# Copyright 2009 Benjamin Mellor
#
# This file is part of Fundy.
#
# Fundy is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from graph import NodePtr, PrimitiveNode, LabelledValue
from utils import rset
from context import Context, OperatorRecord
default_context = Context()
#---------------------------#
# builtin type objects #
#---------------------------#
# type is a weird object; it is its own type
_type = LabelledValue('type')
_type.add_type(_type)
default_context.bind('type', _type)
def _make_primitive_type(name):
tmp = LabelledValue(name)
tmp.add_type(_type)
default_context.bind(name, tmp)
return tmp
def _make_primitive_types(*names):
return map(_make_primitive_type, names)
int_type, char_type, str_type = _make_primitive_types('int', 'char', 'string')
# The unit and bool types are special; instances of them are not constructed
# at runtime, they already exist.
def _make_enum_type(overall_type_name, *constructor_names):
overall_type = _make_primitive_type(overall_type_name)
constructors = _make_primitive_types(*constructor_names)
for c in constructors:
c.add_type(overall_type)
return [overall_type] + constructors
unit_type, unit = _make_enum_type('unittype', 'unit')
bool_type, bool_false, bool_true = _make_enum_type('bool', 'false', 'true')
class IntNode(PrimitiveNode):
def __init__(self, value):
PrimitiveNode.__init__(self)
self.types.add(int_type)
self.intval = value
def to_string(self):
return str(self.intval)
def get_int(self):
return self.intval
def eq(self, other):
return self.intval == other.intval
@staticmethod
def get_type():
return int_type
@staticmethod
def make_getter():
"""
NOT_RPYTHON:
"""
return lambda i: getattr(i, 'intval')
to_repr = to_string
class CharNode(PrimitiveNode):
def __init__(self, value):
assert len(value) == 1
PrimitiveNode.__init__(self)
self.types.add(char_type)
self.charval = value
def to_string(self):
return self.charval
get_char = to_string
def eq(self, other):
return self.charval == other.charval
@staticmethod
def get_type():
return char_type
@staticmethod
def make_getter():
"""
NOT_RPYTHON:
"""
return lambda c: getattr(c, 'charval')
def to_repr(self):
return repr(self.charval)
class StringNode(PrimitiveNode):
def __init__(self, value):
PrimitiveNode.__init__(self)
self.types.add(str_type)
self.strval = value
def to_string(self):
return self.strval
get_string = to_string
def eq(self, other):
return self.strval == other.strval
@staticmethod
def get_type():
return str_type
@staticmethod
def make_getter():
"""
NOT_RPYTHON:
"""
return lambda s: getattr(s, 'strval')
def to_repr(self):
return repr(self.strval)
def IntPtr(i):
return NodePtr(IntNode(i))
def CharPtr(c):
return NodePtr(CharNode(c))
def StrPtr(s):
return NodePtr(StringNode(s))
def BoolPtr(b):
if b:
return bool_true
else:
return bool_false
def UnitPtr():
return unit
from pyops import pyops_context
default_context.update(pyops_context)