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{# USES_VARIABLES { _synaptic_pre, _synaptic_post, sources, targets, N,
N_pre, N_post, _source_offset, _target_offset }
#}
{# WRITES_TO_READ_ONLY_VARIABLES { _synaptic_pre, _synaptic_post, N}
#}
{% extends 'common_group.pyx' %}
{% block maincode %}
cdef size_t _old_num_synapses = {{N}}
cdef size_t _new_num_synapses = _old_num_synapses + _num{{sources}}
{{_dynamic__synaptic_pre}}.resize(_new_num_synapses)
{{_dynamic__synaptic_post}}.resize(_new_num_synapses)
# Get the potentially newly created underlying data arrays
cdef int32_t[:] _synaptic_pre_data = {{_dynamic__synaptic_pre}}.data
cdef int32_t[:] _synaptic_post_data = {{_dynamic__synaptic_post}}.data
for _idx in range(_num{{sources}}):
# After this code has been executed, the arrays _real_sources and
# _real_variables contain the final indices. Having any code here it all is
# only necessary for supporting subgroups
{{ vector_code | autoindent }}
_synaptic_pre_data[_idx + _old_num_synapses] = _real_sources
_synaptic_post_data[_idx + _old_num_synapses] = _real_targets
# now we need to resize all registered variables and set the total number
# of synapses (via Python)
_owner._resize(_new_num_synapses)
# And update N_incoming, N_outgoing and synapse_number
_owner._update_synapse_numbers(_old_num_synapses)
{% endblock %}
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