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Remove the no-longer-true fact of cmp (and soon, log) being universal.

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Graydon Hoare 2012-08-31 11:39:31 -07:00
parent ee37f8a006
commit c3fdc8c7b5
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doc/tutorial.md
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@ -1993,19 +1993,6 @@ comparison operator, so you'll have to write `::<T>` to explicitly
give a type to a name that denotes a generic value. Fortunately, this
is rarely necessary.
## Polymorphic built-ins
There are two built-in operations that, perhaps surprisingly, act on
values of any type. It was already mentioned earlier that `log` can
take any type of value and output it.
More interesting is that Rust also defines an ordering for values of
all datatypes, and allows you to meaningfully apply comparison
operators (`<`, `>`, `<=`, `>=`, `==`, `!=`) to them. For structural
types, the comparison happens left to right, so `~"abc" < ~"bac"` (but
note that `~"bac" < ~"ác"`, because the ordering acts on UTF-8 sequences
without any sophistication).
## Kinds
Perhaps surprisingly, the 'copy' (duplicate) operation is not defined