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| -rw-r--r-- | src/doc/tutorial.md | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/doc/tutorial.md b/src/doc/tutorial.md index 1a004e31c7d..1942ed54097 100644 --- a/src/doc/tutorial.md +++ b/src/doc/tutorial.md @@ -1133,6 +1133,16 @@ let xs = Cons(1, box Cons(2, box Cons(3, box Nil))); let ys = xs; // copies `Cons(u32, pointer)` shallowly ~~~ +> *Note:* Names like `xs` and `ys` are a naming +> convention for collection-like data structures +> (like our `List`). These collections are given +> names appended with 's' to signify plurality, +> i.e. that the data structure stores multiple +> elements. For example, `xs` in this case can +> be read as "a list of ex-es", where "x" here +> are elements of type `u32`. + + Rust will consider a shallow copy of a type with a destructor like `List` to *move ownership* of the value. After a value has been moved, the source location cannot be used unless it is reinitialized. |