def build_pattern(builder, node):
old = builder.__class__
builder.__class__ = SyntaxBuilder
try:
return build(builder, node)
finally:
builder.__class__ = old
def IfElse(self, tval, cond, fval):
return IfElse(build(self, tval), build(self, cond), build(self, fval))
def method(self, items):
result = build(self, items[0])
for item in items[1:]:
result = nt(result, build(self, item))
return result
def method(self, left, right):
return nt(build(self, left), build(self, right))
def method(self, expr):
return nt(build(self, expr))
def Compare(self, expr, ops):
return Compare(build(self, expr),
[(op == '<>' and '!=' or op, build(self, arg))
for op, arg in ops])
def Getattr(self, expr, attr):
return Getattr(build(self, expr), attr)
def Slice3(self, start, stop, stride):
start = start and build(self, start) or Pass
stop = stop and build(self, stop) or Pass
stride = stride and build(self, stride) or Pass
return BuildSlice(start, stop, stride)
def Slice2(self, start, stop):
start = start and build(self, start) or Pass
stop = stop and build(self, stop) or Pass
return GetSlice(Pass, start, stop)
def Subscript(self, left, right):
expr = build(self, left)
key = build(self, right)
if isinstance(key, GetSlice):
return GetSlice(expr, key.start, key.stop)
return Getitem(expr, key)