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-rw-r--r--clang-tools-extra/clangd/index/dex/Iterator.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/clang-tools-extra/clangd/index/dex/Iterator.h b/clang-tools-extra/clangd/index/dex/Iterator.h
index 84a1a16e201..06adaefaf75 100644
--- a/clang-tools-extra/clangd/index/dex/Iterator.h
+++ b/clang-tools-extra/clangd/index/dex/Iterator.h
@@ -95,6 +95,8 @@ public:
/// consume() must *not* be called on children that don't contain the current
/// doc.
virtual float consume() = 0;
+ /// Returns an estimate of advance() calls before the iterator is exhausted.
+ virtual size_t estimateSize() const = 0;
virtual ~Iterator() {}
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