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Rollup merge of #56395 - Centril:stabilize-dbg-macro, r=SimonSapin

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Stabilize dbg!(...)

Per FCP in https://github.com/rust-lang/rust/issues/54306 (which is ~1 day from completion).

r? @SimonSapin

The PR is fairly isolated so a rollup should probably work.
This commit is contained in:
kennytm 2018-12-03 18:07:08 +08:00 • committed by GitHub
commit 441aaf8110
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9 changed files with 14 additions and 44 deletions
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12
src/libstd/macros.rs
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@ -224,11 +224,9 @@ macro_rules! eprintln {
/// the value of a given expression. An example:
///
/// ```rust
/// #![feature(dbg_macro)]
///
/// let a = 2;
/// let b = dbg!(a * 2) + 1;
/// // ^-- prints: [src/main.rs:4] a * 2 = 4
/// // ^-- prints: [src/main.rs:2] a * 2 = 4
/// assert_eq!(b, 5);
/// ```
///
@ -262,8 +260,6 @@ macro_rules! eprintln {
/// With a method call:
///
/// ```rust
/// #![feature(dbg_macro)]
///
/// fn foo(n: usize) {
/// if let Some(_) = dbg!(n.checked_sub(4)) {
/// // ...
@ -282,8 +278,6 @@ macro_rules! eprintln {
/// Naive factorial implementation:
///
/// ```rust
/// #![feature(dbg_macro)]
///
/// fn factorial(n: u32) -> u32 {
/// if dbg!(n <= 1) {
/// dbg!(1)
@ -312,8 +306,6 @@ macro_rules! eprintln {
/// The `dbg!(..)` macro moves the input:
///
/// ```compile_fail
/// #![feature(dbg_macro)]
///
/// /// A wrapper around `usize` which importantly is not Copyable.
/// #[derive(Debug)]
/// struct NoCopy(usize);
@ -325,7 +317,7 @@ macro_rules! eprintln {
///
/// [stderr]: https://en.wikipedia.org/wiki/Standard_streams#Standard_error_(stderr)
#[macro_export]
#[unstable(feature = "dbg_macro", issue = "54306")]
#[stable(feature = "dbg_macro", since = "1.32.0")]
macro_rules! dbg {
($val:expr) => {
// Use of `match` here is intentional because it affects the lifetimes