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tutorial: Mention by-value argument passing style.

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Erick Tryzelaar 2011-12-31 12:20:03 -08:00
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doc/tutorial/args.md
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@ -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 de-initialized on the caller side, and give ownership of it to the
called function. This is written `-`. 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 Finally, the default passing styles (by-value for non-structural
types, by-reference for structural ones) are written `+` for by-value types, by-reference for structural ones) are written `+` for by-value
and `&&` for by(-immutable)-reference. It is sometimes necessary to and `&&` for by(-immutable)-reference. It is sometimes necessary to