From eba891e989bd8e051e853b1760824013ce23da3a Mon Sep 17 00:00:00 2001 From: Erick Tryzelaar Date: Sat, 31 Dec 2011 12:20:03 -0800 Subject: [PATCH] tutorial: Mention by-value argument passing style. --- doc/tutorial/args.md | 3 +++ 1 file changed, 3 insertions(+) diff --git a/doc/tutorial/args.md b/doc/tutorial/args.md index 1797f5a23f5..de2fe3bf25e 100644 --- a/doc/tutorial/args.md +++ b/doc/tutorial/args.md @@ -104,6 +104,9 @@ Another style is by-move, which will cause the argument to become de-initialized on the caller side, and give ownership of it to the called function. This is written `-`. +Sometimes you need to pass a structural type by value, such as when +interfacing with external native functions. This is written `++`. + Finally, the default passing styles (by-value for non-structural types, by-reference for structural ones) are written `+` for by-value and `&&` for by(-immutable)-reference. It is sometimes necessary to