def do_evaluate( self, env ):
idx = self.index.evaluate( env )
arr = self.array_value.evaluate( env )
if arr.is_known( env ):
assert( idx.__class__ == PepInt )
assert( implements_interface( arr, PepArray ) )
# TODO: handle large number indices
return arr.get_index( int( idx.value ) ).evaluate( env )
else:
return self
def do_evaluate( self, env ):
# Look up this symbol in the namespace of our environment
value = self._lookup( env ).evaluate( env )
if value.is_known( env ):
# Pass back what we looked up
return value
elif implements_interface( value, PepSymbol ):
return value
else:
# If what we find is a variable (i.e. something unknown until
# runtime) then we simply return ourselves: for the purpose of
# rendering, this _is_ a symbol.
return self
