[flang] Fix compilation error on macOS

tskeith · memfrob · commit 4d56eb0daf74 · 2022-10-04T16:47:08.000-04:00
The call to `std::min` failed to compile with GCC on macOS due to type inference because `std::size_t` is `long unsigned int` but `std::int64_t` is `long long int`. Original-commit: flang-compiler/f18@c342575 Reviewed-on: flang-compiler/f18#977
diff --git a/flang/runtime/buffer.h b/flang/runtime/buffer.h
@@ -41,8 +41,7 @@ template<typename STORE> class FileFrame {
   FileOffset FrameAt() const { return fileOffset_ + frame_; }
   char *Frame() const { return buffer_ + start_ + frame_; }
   std::size_t FrameLength() const {
-    return std::min(
-        static_cast<std::size_t>(length_ - frame_), size_ - (start_ + frame_));
+    return std::min<std::size_t>(length_ - frame_, size_ - (start_ + frame_));
   }
 
   // Returns a short frame at a non-fatal EOF.  Can return a long frame as well.

Original file line number	Diff line number	Diff line change
`@@ -41,8 +41,7 @@ template<typename STORE> class FileFrame {`
`41`	`41`	`FileOffset FrameAt() const { return fileOffset_ + frame_; }`
`42`	`42`	`char *Frame() const { return buffer_ + start_ + frame_; }`
`43`	`43`	`std::size_t FrameLength() const {`
`44`		`- return std::min(`
`45`		`- static_cast<std::size_t>(length_ - frame_), size_ - (start_ + frame_));`
	`44`	`+ return std::min<std::size_t>(length_ - frame_, size_ - (start_ + frame_));`
`46`	`45`	`}`
`47`	`46`
`48`	`47`	`// Returns a short frame at a non-fatal EOF. Can return a long frame as well.`