Mercurial > lbo > hg > pcombinators

changeset 57:66da7e4ab989 draft

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Remove unnecessary hold instrumentation in FirstAlternative
author Lewin Bormann <lbo@spheniscida.de>
date Fri, 24 May 2019 00:53:46 +0200
parents 571cbdc11361
children 24c542f42f75
files pcombinators/combinators.py
diffstat 1 files changed, 0 insertions(+), 6 deletions(-) [+]
line wrap: on
line diff
--- a/pcombinators/combinators.py	Fri May 24 00:53:06 2019 +0200
+++ b/pcombinators/combinators.py	Fri May 24 00:53:46 2019 +0200
@@ -188,16 +188,10 @@
     """Attempt parsers until one matches. Result is result of that parser."""
 
     def parse(self, st):
-        hold = st.hold()
         for p in self._parsers:
-            before = st.hold()
             r, st2 = p.parse(st)
             if r is not None:
-                st.release(before)
-                st.release(hold)
                 return r, st2
-            st.reset(before)
-        st.reset(hold)
         return None, st
 
 class LongestAlternative(_Alternative):