1 files changed, 19 insertions, 0 deletions
diff --git a/includes/image_io/utils/string_outputter.h b/includes/image_io/utils/string_outputter.h
new file mode 100644
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+++ b/includes/image_io/utils/string_outputter.h
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+#ifndef IMAGE_IO_UTILS_STRING_OUTPUTTER_H_  // NOLINT
+#define IMAGE_IO_UTILS_STRING_OUTPUTTER_H_  // NOLINT
+
+#include <functional>
+#include <string>
+
+namespace photos_editing_formats {
+namespace image_io {
+
+/// A typedef for a function that accepts a string and writes it somewhere.
+/// These types of functions are typically used in command line tools to write
+/// the output of the tool to stdout or some other location. The function
+/// should not write its own new line at the end of the str.
+using StringOutputter = std::function<void(const std::string& str)>;
+
+}  // namespace image_io
+}  // namespace photos_editing_formats
+
+#endif  // IMAGE_IO_UTILS_STRING_OUTPUTTER_H_  // NOLINT