Adding upstream version 14.2.21.upstream/14.2.21upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/boost/libs/optional/README.md b/src/boost/libs/optional/README.md
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+optional
+========
+
+A library for representing optional (nullable) objects in C++.
+
+```cpp
+optional<int> readInt(); // this function may return either an int or a not-an-int
+
+if (optional<int> oi = readInt()) // did I get a real int
+  cout << "my int is: " << *oi;   // use my int
+else
+  cout << "I have no int";
+```
+
+For more information refer to the documentation provided with this library.