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doc: Fix broken examples

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This commit is contained in:
Brian Anderson 2012-09-04 15:46:19 -07:00
parent 02b1c32e4d
commit ef880f2245
1 changed files with 6 additions and 6 deletions
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doc/rust.md
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@ -1027,9 +1027,9 @@ pure fn lt_42(x: int) -> bool {
Pure functions may call other pure functions:
~~~~{.xfail-test}
pure fn pure_length<T>(ls: list<T>) -> uint { /* ... */ }
pure fn pure_length<T>(ls: List<T>) -> uint { /* ... */ }
pure fn nonempty_list<T>(ls: list<T>) -> bool { pure_length(ls) > 0u }
pure fn nonempty_list<T>(ls: List<T>) -> bool { pure_length(ls) > 0u }
~~~~
*TODO:* should actually define referential transparency.
@ -1055,14 +1055,14 @@ An example of a pure function that uses an unchecked block:
~~~~
# import std::list::*;
fn pure_foldl<T, U: copy>(ls: list<T>, u: U, f: fn(&&T, &&U) -> U) -> U {
fn pure_foldl<T, U: copy>(ls: List<T>, u: U, f: fn(&&T, &&U) -> U) -> U {
match ls {
nil => u,
cons(hd, tl) => f(hd, pure_foldl(*tl, f(hd, u), f))
Nil => u,
Cons(hd, tl) => f(hd, pure_foldl(*tl, f(hd, u), f))
}
}
pure fn pure_length<T>(ls: list<T>) -> uint {
pure fn pure_length<T>(ls: List<T>) -> uint {
fn count<T>(_t: T, &&u: uint) -> uint { u + 1u }
unchecked {
pure_foldl(ls, 0u, count)