libbacktrace: Fix clang-tidy warning
* warning: overloaded 'operator{++,--}' returns a reference instead of a constant object type [cert-dcl21-cpp]
Change-Id: I8a904622b30dc70d17483b87748c2ea541e50c46
diff --git a/libbacktrace/include/backtrace/BacktraceMap.h b/libbacktrace/include/backtrace/BacktraceMap.h
index f8d5058..e000a00 100644
--- a/libbacktrace/include/backtrace/BacktraceMap.h
+++ b/libbacktrace/include/backtrace/BacktraceMap.h
@@ -79,7 +79,7 @@
index_++;
return *this;
}
- iterator& operator++(int increment) {
+ const iterator operator++(int increment) {
index_ += increment;
return *this;
}
@@ -87,7 +87,7 @@
index_--;
return *this;
}
- iterator& operator--(int decrement) {
+ const iterator operator--(int decrement) {
index_ -= decrement;
return *this;
}