Starting to try to move some functions away from Evaluator.

This time eval_trailer.

jedi/evaluate/helpers.py

@@ -6,7 +6,9 @@ from itertools import chain
 from contextlib import contextmanager
 
 from parso.python import tree
+
 from jedi.parser_utils import get_parent_scope
+from jedi.evaluate.syntax_tree import eval_trailer
 
 
 def is_stdlib_path(path):
@@ -88,7 +90,7 @@ def evaluate_call_of_leaf(context, leaf, cut_own_trailer=False):
 
     values = context.eval_node(base)
     for trailer in trailers:
-        values = context.eval_trailer(values, trailer)
+        values = eval_trailer(context, values, trailer)
     return values