blob: e47336dc21ca2479183027b853c889134a65f963 (
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diff --git a/src/prediction/zero_query_dict.h b/src/prediction/zero_query_dict.h
index c11aa24d..4eece4eb 100644
--- a/src/prediction/zero_query_dict.h
+++ b/src/prediction/zero_query_dict.h
@@ -132,6 +132,17 @@ class ZeroQueryDict {
return tmp;
}
+ iterator &operator--() {
+ ptr_ -= kTokenByteSize;
+ return *this;
+ }
+
+ iterator operator--(int) {
+ const iterator tmp(ptr_, string_array_);
+ ptr_ -= kTokenByteSize;
+ return tmp;
+ }
+
iterator &operator+=(ptrdiff_t n) {
ptr_ += n * kTokenByteSize;
return *this;
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