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Commit 8c75a437 authored by Stefan Marr's avatar Stefan Marr
Browse files

Added StringPrimitives


Signed-off-by: default avatarStefan Marr <git@stefan-marr.de>
parent 2f239eb2
from som.primitives.primitives import Primitives
from som.vmobjects.primitive import Primitive
class StringPrimitives(Primitives):
def install_primitives(self):
def _concat(ivkbl, frame, interpreter):
argument = frame.pop()
rcvr = frame.pop()
frame.push(self._universe.new_string(rcvr.get_embedded_string()
+ argument.get_embedded_string()))
self._install_instance_primitive(Primitive("concatenate:", self._universe, _concat))
def _asSymbol(ivkbl, frame, interpreter):
rcvr = frame.pop()
frame.push(self._universe.symbol_for(rcvr.get_embedded_string()))
self._install_instance_primitive(Primitive("asSymbol", self._universe, _asSymbol))
def _length(ivkbl, frame, interpreter):
rcvr = frame.pop()
frame.push(self._universe.new_integer(rcvr.get_embedded_string().length()))
self._install_instance_primitive(Primitive("length", self._universe, _length))
def _equals(ivkbl, frame, interpreter):
op1 = frame.pop()
op2 = frame.pop() # rcvr
if op1.get_class() == self._universe.stringClass:
if op1.get_embedded_string() == op2.get_embedded_string():
frame.push(self._universe.trueObject)
return
frame.push(self._universe.falseObject)
self._install_instance_primitive(Primitive("=", self._universe, _equals))
def _substring(ivkbl, frame, interpreter):
end = frame.pop()
start = frame.pop()
rcvr = frame.pop()
try:
frame.push(self._universe.new_string(rcvr.get_embedded_string()[
start.get_embedded_integer():end.get_embedded_integer() + 1]))
except IndexError, e:
frame.push(self._universe.new_string("Error - index out of bounds: %s" % e))
self._install_instance_primitive(Primitive("primSubstringFrom:to:", self._universe, _substring))
def _hashcode(ivkbl, frame, interpreter):
rcvr = frame.pop()
frame.push(self._universe.new_integer(hash(rcvr.get_embedded_string())))
self._install_instance_primitive(Primitive("hashcode", self._universe, _hashcode))
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