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maps access to a missing key

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will return the "zero" value

R=rsc
CC=golang-dev
https://golang.org/cl/700041
This commit is contained in:
Ken Thompson 2010-03-23 13:00:02 -07:00
parent 66caa38d49
commit e781303e27
1 changed files with 4 additions and 2 deletions
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6
src/pkg/runtime/hashmap.c
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@ -769,8 +769,10 @@ void
av = (byte*)&h + h->vo1;
mapaccess(h, ak, av, &pres);
if(!pres)
throw("runtime.mapaccess1: key not in map");
// new spec -- all elements have "zero" value
// if(!pres)
// throw("runtime.mapaccess1: key not in map");
if(debug) {
prints("runtime.mapaccess1: map=");