def __ilshift__(self, A):
""" A can be two things :
* G <<= any_GF_Initializers will init the GFBloc with the initializer
* G <<= g2 where g2 is a GFBloc will copy g2 into self
"""
if isinstance(A, self.__class__) :
if self is not A : self.copyFrom(A) # otherwise it is useless AND does not work !!
elif isinstance(A, lazy_expressions.lazy_expr) : # A is a lazy_expression made of GF, scalars, descriptors
A2= Descriptors.convert_scalar_to_Const(A)
def e_t (x) :
if not isinstance(x, Descriptors.Base) : return x
tmp = self.copy()
x(tmp)
return tmp
#e_t2 = self.__lazy_expr_eval_context__()
self.copyFrom ( lazy_expressions.eval_lazy_expr(e_t, A2) )
elif isinstance(A, lazy_expressions.lazy_expr_terminal) : #e.g. g<<= SemiCircular (...)
self <<= lazy_expressions.lazy_expr(A)
elif Descriptors.is_scalar(A) : #in the case it is a scalar ....
self <<= lazy_expressions.lazy_expr(A)
elif isinstance(A, GF_Initializers.Base) : # backwards compatibility, deprecated
A(self)
else :
raise RuntimeError, " GF Block : <<= operator : RHS not understood"
return self
def __ilshift__(self, A):
""" A can be two things :
* G <<= any_GF_Initializers will init the GFBloc with the initializer
* G <<= g2 where g2 is a GFBloc will copy g2 into self
"""
if isinstance(A, self.__class__):
if self is not A:
self.copyFrom(
A) # otherwise it is useless AND does not work !!
elif isinstance(
A, lazy_expressions.lazy_expr
): # A is a lazy_expression made of GF, scalars, descriptors
A2 = Descriptors.convert_scalar_to_Const(A)
def e_t(x):
if not isinstance(x, Descriptors.Base): return x
tmp = self.copy()
x(tmp)
return tmp
#e_t2 = self.__lazy_expr_eval_context__()
self.copyFrom(lazy_expressions.eval_lazy_expr(e_t, A2))
elif isinstance(A, lazy_expressions.lazy_expr_terminal
): #e.g. g<<= SemiCircular (...)
self <<= lazy_expressions.lazy_expr(A)
elif Descriptors.is_scalar(A): #in the case it is a scalar ....
self <<= lazy_expressions.lazy_expr(A)
elif isinstance(
A,
GF_Initializers.Base): # backwards compatibility, deprecated
A(self)
else:
raise RuntimeError, " GF Block : <<= operator : RHS not understood"
return self
def convert_scalar_to_Const(expr) :
# if the expression is a pure scalar, replace it by Const
t= expr.get_terminal()
if is_scalar(t) : return lazy_expr( Const(t) )
# otherwise : replace all scalar appearing in +/- operations by Const
def act (tag, childs) :
if tag in ["+", "-"] :
for n,c in enumerate(childs) :
t = c.get_terminal()
if is_scalar(t) : childs[n] = Const (t)
return (tag,childs)
return transform(expr, act)
def convert_scalar_to_Const(expr):
# if the expression is a pure scalar, replace it by Const
t = expr.get_terminal()
if is_scalar(t): return lazy_expr(Const(t))
# otherwise : replace all scalar appearing in +/- operations by Const
def act(tag, childs):
if tag in ["+", "-"]:
for n, c in enumerate(childs):
t = c.get_terminal()
if is_scalar(t): childs[n] = Const(t)
return (tag, childs)
return transform(expr, act)
