Make single-parameter constructors explicit

PiperOrigin-RevId: 157628970

3 files changed, 3 insertions, 3 deletions

diff --git a/tensorflow/core/lib/io/inputstream_interface_test.cc b/tensorflow/core/lib/io/inputstream_interface_test.cc
index 09d5d74869..43c4c55b7a 100644
--- a/tensorflow/core/lib/io/inputstream_interface_test.cc
+++ b/tensorflow/core/lib/io/inputstream_interface_test.cc
@@ -25,7 +25,7 @@ namespace {
 
 class TestStringStream : public InputStreamInterface {
  public:
-  TestStringStream(const string& content) : content_(content) {}
+  explicit TestStringStream(const string& content) : content_(content) {}
 
   Status ReadNBytes(int64 bytes_to_read, string* result) override {
     result->clear();
diff --git a/tensorflow/core/lib/io/iterator.cc b/tensorflow/core/lib/io/iterator.cc
index 60f9981c2f..50eaa50b5c 100644
--- a/tensorflow/core/lib/io/iterator.cc
+++ b/tensorflow/core/lib/io/iterator.cc
@@ -53,7 +53,7 @@ void Iterator::RegisterCleanup(CleanupFunction func, void* arg1, void* arg2) {
 namespace {
 class EmptyIterator : public Iterator {
  public:
-  EmptyIterator(const Status& s) : status_(s) {}
+  explicit EmptyIterator(const Status& s) : status_(s) {}
   bool Valid() const override { return false; }
   void Seek(const StringPiece& target) override {}
   void SeekToFirst() override {}
diff --git a/tensorflow/core/lib/io/table_test.cc b/tensorflow/core/lib/io/table_test.cc
index 31100906e5..78a3fa501c 100644
--- a/tensorflow/core/lib/io/table_test.cc
+++ b/tensorflow/core/lib/io/table_test.cc
@@ -109,7 +109,7 @@ class StringSink : public WritableFile {
 
 class StringSource : public RandomAccessFile {
  public:
-  StringSource(const StringPiece& contents)
+  explicit StringSource(const StringPiece& contents)
       : contents_(contents.data(), contents.size()), bytes_read_(0) {}
 
   ~StringSource() override {}