mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add #[must_use] message to Fn* traits

Browse Source
This commit is contained in:
Taiki Endo 2019-02-07 19:44:06 +09:00
parent 626e74d5f6
commit 1d05f81d19
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/libcore/ops/function.rs
View File

@ -62,7 +62,7 @@
label="expected an `Fn<{Args}>` closure, found `{Self}`",
)]
#[fundamental] // so that regex can rely that `&str: !FnMut`
#[must_use]
#[must_use = "closures are lazy and do nothing unless called"]
pub trait Fn<Args> : FnMut<Args> {
/// Performs the call operation.
#[unstable(feature = "fn_traits", issue = "29625")]
@ -141,7 +141,7 @@ pub trait Fn<Args> : FnMut<Args> {
label="expected an `FnMut<{Args}>` closure, found `{Self}`",
)]
#[fundamental] // so that regex can rely that `&str: !FnMut`
#[must_use]
#[must_use = "closures are lazy and do nothing unless called"]
pub trait FnMut<Args> : FnOnce<Args> {
/// Performs the call operation.
#[unstable(feature = "fn_traits", issue = "29625")]
@ -220,7 +220,7 @@ pub trait FnMut<Args> : FnOnce<Args> {
label="expected an `FnOnce<{Args}>` closure, found `{Self}`",
)]
#[fundamental] // so that regex can rely that `&str: !FnMut`
#[must_use]
#[must_use = "closures are lazy and do nothing unless called"]
pub trait FnOnce<Args> {
/// The returned type after the call operator is used.
#[stable(feature = "fn_once_output", since = "1.12.0")]