def convert_to_descriptor(self, descriptor_string, all_layers):
"""Convenience function intended to be called from child classes,
converts a string representing a descriptor ('descriptor_string')
into an object of type Descriptor, and returns it. It needs 'self' and
'all_layers' (where 'all_layers' is a list of objects of type
XconfigLayerBase) so that it can work out a list of the names of other
layers, and get dimensions from them.
"""
prev_names = xutils.get_prev_names(all_layers, self)
tokens = xutils.tokenize_descriptor(descriptor_string, prev_names)
pos = 0
(descriptor, pos) = xutils.parse_new_descriptor(tokens, pos, prev_names)
# note: 'pos' should point to the 'end of string' marker
# that terminates 'tokens'.
if pos != len(tokens) - 1:
raise RuntimeError("Parsing Descriptor, saw junk at end: " +
' '.join(tokens[pos:-1]))
return descriptor
def convert_to_descriptor(self, descriptor_string, all_layers):
"""Convenience function intended to be called from child classes,
converts a string representing a descriptor ('descriptor_string')
into an object of type Descriptor, and returns it. It needs 'self' and
'all_layers' (where 'all_layers' is a list of objects of type
XconfigLayerBase) so that it can work out a list of the names of other
layers, and get dimensions from them.
"""
prev_names = xutils.get_prev_names(all_layers, self)
tokens = xutils.tokenize_descriptor(descriptor_string, prev_names)
pos = 0
(descriptor, pos) = xutils.parse_new_descriptor(tokens, pos, prev_names)
# note: 'pos' should point to the 'end of string' marker
# that terminates 'tokens'.
if pos != len(tokens) - 1:
raise RuntimeError("Parsing Descriptor, saw junk at end: " +
' '.join(tokens[pos:-1]))
return descriptor