From 4da3793985d1d177a95d67e78dd2f4f5f52e2eab Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@fri.uni-lj.si>
Date: Tue, 12 Jan 2016 13:57:12 +0100
Subject: Replace prolog.util.rename_vars with rename_vars_list everywhere

---
 monkey/__init__.py |  4 ++--
 monkey/edits.py    |  8 ++++----
 prolog/util.py     | 39 +++++----------------------------------
 3 files changed, 11 insertions(+), 40 deletions(-)

diff --git a/monkey/__init__.py b/monkey/__init__.py
index fbb4535..79dfe2d 100644
--- a/monkey/__init__.py
+++ b/monkey/__init__.py
@@ -16,7 +16,7 @@
 
 import time
 
-from prolog.util import tokenize, rename_vars, stringify, parse, interesting_ranges, rename_vars_list
+from prolog.util import tokenize, stringify, parse, interesting_ranges, rename_vars_list
 from .util import PQueue
 
 # Starting from [code], find a sequence of edits that transforms it into a
@@ -33,7 +33,7 @@ def fix(code, edits, test, timeout=30, debug=False):
             for (path, a, b), (p, uids) in edits.items():
                 if path == range_path and a == part_normal:
                     reverse_names = {v: k for k, v in names.items()}
-                    b_real = tuple(rename_vars(b, reverse_names))
+                    b_real = tuple(rename_vars_list(b, reverse_names))
                     new_tokens = []
                     idx = None
                     for i, t in enumerate(tokens):
diff --git a/monkey/edits.py b/monkey/edits.py
index 73f692d..82e5066 100644
--- a/monkey/edits.py
+++ b/monkey/edits.py
@@ -18,7 +18,7 @@ import collections
 import math
 
 from .action import expand, parse
-from prolog.util import normalized, parse as prolog_parse, rename_vars, rename_vars_ast, rename_vars_list, interesting_ranges, stringify, tokenize
+from prolog.util import normalized, parse as prolog_parse, rename_vars_ast, rename_vars_list, interesting_ranges, stringify, tokenize
 from .util import avg, logistic
 
 def get_edits_from_trace(trace, test, id):
@@ -142,10 +142,10 @@ def get_edits_from_solutions(solutions, test):
 
         # Update submission/query counters (use normalized variables).
         for code, correct in trace_submissions:
-            code = stringify(rename_vars(tokenize(code)))
+            code = stringify(rename_vars_list(tokenize(code)))
             submissions[(code, correct)].add(uid)
         for query in trace_queries:
-            code = stringify(rename_vars(tokenize(query)))
+            code = stringify(rename_vars_list(tokenize(query)))
             queries[code] += 1
 
     # Discard edits that only occur in one trace.
@@ -232,7 +232,7 @@ if __name__ == '__main__':
                                          if p.identifier in used_predicate_identifiers])
 
             # Check for cached results.
-            normal_code = stringify(rename_vars(tokenize(code)))
+            normal_code = stringify(rename_vars_list(tokenize(code)))
             code_key = (normal_code, tuple(dependencies))
             if code_key not in test_results[pid]:
                 aux_code = '\n' + solutions_for_problems(problem.language, dependencies) + '\n' + facts
diff --git a/prolog/util.py b/prolog/util.py
index e69d4d5..c0f1ef5 100644
--- a/prolog/util.py
+++ b/prolog/util.py
@@ -78,31 +78,6 @@ def stringify(obj):
             return ''.join([stringify(child) for child in obj]) + '\n'
         return ''.join([stringify(child) for child in obj])
 
-# Rename variables in [tokens] to A0, A1, A2,… in order of appearance.
-def rename_vars(tokens, names=None):
-    if names is None:
-        names = {}
-    next_id = len(names)
-
-    # Return a new list.
-    tokens = list(tokens)
-    for i, t in enumerate(tokens):
-        if t.type == 'PERIOD':
-            pass
-#            names.clear()
-#            next_id = 0
-        elif t.type == 'VARIABLE':
-            if t.val.startswith('_'):
-                tokens[i] = t.clone(val='A{}'.format(next_id))
-                next_id += 1
-            else:
-                cur_name = t.val
-                if cur_name not in names:
-                    names[cur_name] = 'A{}'.format(next_id)
-                    next_id += 1
-                tokens[i] = t.clone(val=names[cur_name])
-    return tokens
-
 # Rename variables in [tokens] to A0, A1, A2,… in order of appearance.
 def rename_vars_list(tokens, names=None):
     if names is None:
@@ -112,16 +87,12 @@ def rename_vars_list(tokens, names=None):
     # Return a new list.
     tokens = list(tokens)
     for i, t in enumerate(tokens):
-        if t.type == 'VARIABLE':
-            if t.val.startswith('_'):
-                tokens[i] = t.clone(val='A{}'.format(next_id))
+        if t.type == 'VARIABLE' and t.val != '_':
+            cur_name = t.val
+            if cur_name not in names:
+                names[cur_name] = 'A{}'.format(next_id)
                 next_id += 1
-            else:
-                cur_name = t.val
-                if cur_name not in names:
-                    names[cur_name] = 'A{}'.format(next_id)
-                    next_id += 1
-                tokens[i] = t.clone(val=names[cur_name])
+            tokens[i] = t.clone(val=names[cur_name])
     return tokens
 
 # Rename variables in AST rooted at [root] to A0, A1, A2,… in order of
-- 
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