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std: Mark some functions as pure

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This commit is contained in:
Chris Peterson 2012-12-23 14:38:01 -08:00
parent 6d8621ae7f
commit ffaa477368
4 changed files with 12 additions and 12 deletions
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12
src/libstd/list.rs
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@ -22,8 +22,8 @@ pub enum List<T> {
Nil,
}
/// Cregate a list from a vector
pub fn from_vec<T: Copy>(v: &[T]) -> @List<T> {
/// Create a list from a vector
pub pure fn from_vec<T: Copy>(v: &[T]) -> @List<T> {
vec::foldr(v, @Nil::<T>, |h, t| @Cons(*h, t))
}
@ -53,7 +53,7 @@ pub fn foldl<T: Copy, U>(z: T, ls: @List<U>, f: fn(&T, &U) -> T) -> T {
* When function `f` returns true then an option containing the element
* is returned. If `f` matches no elements then none is returned.
*/
pub fn find<T: Copy>(ls: @List<T>, f: fn(&T) -> bool) -> Option<T> {
pub pure fn find<T: Copy>(ls: @List<T>, f: fn(&T) -> bool) -> Option<T> {
let mut ls = ls;
loop {
ls = match *ls {
@ -88,7 +88,7 @@ pub pure fn is_not_empty<T: Copy>(ls: @List<T>) -> bool {
}
/// Returns the length of a list
pub fn len<T>(ls: @List<T>) -> uint {
pub pure fn len<T>(ls: @List<T>) -> uint {
let mut count = 0u;
iter(ls, |_e| count += 1u);
count
@ -131,7 +131,7 @@ pure fn push<T: Copy>(ll: &mut @list<T>, vv: T) {
*/
/// Iterate over a list
pub fn iter<T>(l: @List<T>, f: fn(&T)) {
pub pure fn iter<T>(l: @List<T>, f: fn(&T)) {
let mut cur = l;
loop {
cur = match *cur {
@ -145,7 +145,7 @@ pub fn iter<T>(l: @List<T>, f: fn(&T)) {
}
/// Iterate over a list
pub fn each<T>(l: @List<T>, f: fn(&T) -> bool) {
pub pure fn each<T>(l: @List<T>, f: fn(&T) -> bool) {
let mut cur = l;
loop {
cur = match *cur {