changeset 38864:73731fa8d1bd

fileset: reorder 'or' expression by weight

--- a/mercurial/filesetlang.py	Sat Aug 04 17:08:33 2018 +0900
+++ b/mercurial/filesetlang.py	Sat Jul 21 17:13:34 2018 +0900
@@ -207,6 +207,8 @@
             return wb, _optimizeandops(op, tb, ta)
     if op == 'or':
         ws, ts = zip(*(_optimize(y) for y in x[1:]))
+        ts = tuple(it[1] for it in sorted(enumerate(ts),
+                                          key=lambda it: ws[it[0]]))
         return max(ws), (op,) + ts
     if op == 'list':
         ws, ts = zip(*(_optimize(y) for y in x[1:]))

--- a/tests/test-fileset.t	Sat Aug 04 17:08:33 2018 +0900
+++ b/tests/test-fileset.t	Sat Jul 21 17:13:34 2018 +0900
@@ -203,6 +203,30 @@
   b1
   b2
 
+OR expression should be reordered by weight:
+
+  $ fileset -p optimized -s -r. 'grep("a") or a1 or grep("b") or b2'
+  * optimized:
+  (or
+    (symbol 'a1')
+    (symbol 'b2')
+    (func
+      (symbol 'grep')
+      (string 'a'))
+    (func
+      (symbol 'grep')
+      (string 'b')))
+  * matcher:
+  <unionmatcher matchers=[
+    <patternmatcher patterns='(?:a1$)'>,
+    <patternmatcher patterns='(?:b2$)'>,
+    <predicatenmatcher pred=grep('a')>,
+    <predicatenmatcher pred=grep('b')>]>
+  a1
+  a2
+  b1
+  b2
+
 Use differencematcher for 'x and not y':
 
   $ fileset -p optimized -s 'a* and not a1'