stabilize std::dbg!(...)
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9 changed files with 14 additions and 44 deletions
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@ -224,11 +224,9 @@ macro_rules! eprintln {
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/// the value of a given expression. An example:
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///
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/// ```rust
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/// #![feature(dbg_macro)]
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///
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/// let a = 2;
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/// let b = dbg!(a * 2) + 1;
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/// // ^-- prints: [src/main.rs:4] a * 2 = 4
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/// // ^-- prints: [src/main.rs:2] a * 2 = 4
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/// assert_eq!(b, 5);
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/// ```
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///
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@ -262,8 +260,6 @@ macro_rules! eprintln {
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/// With a method call:
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///
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/// ```rust
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/// #![feature(dbg_macro)]
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///
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/// fn foo(n: usize) {
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/// if let Some(_) = dbg!(n.checked_sub(4)) {
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/// // ...
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@ -282,8 +278,6 @@ macro_rules! eprintln {
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/// Naive factorial implementation:
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///
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/// ```rust
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/// #![feature(dbg_macro)]
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///
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/// fn factorial(n: u32) -> u32 {
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/// if dbg!(n <= 1) {
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/// dbg!(1)
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@ -312,8 +306,6 @@ macro_rules! eprintln {
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/// The `dbg!(..)` macro moves the input:
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///
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/// ```compile_fail
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/// #![feature(dbg_macro)]
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///
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/// /// A wrapper around `usize` which importantly is not Copyable.
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/// #[derive(Debug)]
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/// struct NoCopy(usize);
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@ -325,7 +317,7 @@ macro_rules! eprintln {
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///
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/// [stderr]: https://en.wikipedia.org/wiki/Standard_streams#Standard_error_(stderr)
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#[macro_export]
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#[unstable(feature = "dbg_macro", issue = "54306")]
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#[stable(feature = "dbg_macro", since = "1.32.0")]
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macro_rules! dbg {
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($val:expr) => {
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// Use of `match` here is intentional because it affects the lifetimes
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@ -5,8 +5,6 @@
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// Tests ensuring that `dbg!(expr)` has the expected run-time behavior.
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// as well as some compile time properties we expect.
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#![feature(dbg_macro)]
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#[derive(Copy, Clone, Debug)]
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struct Unit;
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@ -57,31 +55,31 @@ fn test() {
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fn validate_stderr(stderr: Vec<String>) {
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assert_eq!(stderr, &[
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":23] Unit = Unit",
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":21] Unit = Unit",
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":24] a = Unit",
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":22] a = Unit",
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":30] Point{x: 42, y: 24,} = Point {",
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":28] Point{x: 42, y: 24,} = Point {",
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" x: 42,",
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" y: 24",
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"}",
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":31] b = Point {",
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":29] b = Point {",
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" x: 42,",
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" y: 24",
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"}",
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":40] &a = NoCopy(",
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":38] &a = NoCopy(",
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" 1337",
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")",
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":40] dbg!(& a) = NoCopy(",
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":38] dbg!(& a) = NoCopy(",
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" 1337",
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")",
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":45] f(&42) = 42",
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":43] f(&42) = 42",
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"before",
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":50] { foo += 1; eprintln!(\"before\"); 7331 } = 7331",
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":48] { foo += 1; eprintln!(\"before\"); 7331 } = 7331",
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]);
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}
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@ -1,5 +0,0 @@
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// Feature gate test for `dbg!(..)`.
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fn main() {
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dbg!(1);
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}
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@ -1,11 +0,0 @@
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error[E0658]: macro dbg! is unstable (see issue #54306)
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--> $DIR/dbg-macro-feature-gate.rs:4:5
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LL | dbg!(1);
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| ^^^^^^^^
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= help: add #![feature(dbg_macro)] to the crate attributes to enable
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error: aborting due to previous error
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For more information about this error, try `rustc --explain E0658`.
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@ -1,5 +1,5 @@
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error[E0382]: use of moved value: `a`
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--> $DIR/dbg-macro-move-semantics.rs:11:18
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--> $DIR/dbg-macro-move-semantics.rs:9:18
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LL | let _ = dbg!(a);
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| ------- value moved here
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@ -1,7 +1,5 @@
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// Test ensuring that `dbg!(expr)` will take ownership of the argument.
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#![feature(dbg_macro)]
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#[derive(Debug)]
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struct NoCopy(usize);
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@ -1,5 +1,5 @@
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error[E0382]: use of moved value: `a`
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--> $DIR/dbg-macro-move-semantics.rs:11:18
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--> $DIR/dbg-macro-move-semantics.rs:9:18
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LL | let _ = dbg!(a);
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| ------- value moved here
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@ -10,7 +10,7 @@ LL | let _ = dbg!(a);
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= note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
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error[E0382]: use of moved value: `a`
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--> $DIR/dbg-macro-move-semantics.rs:11:13
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--> $DIR/dbg-macro-move-semantics.rs:9:13
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LL | let _ = dbg!(a);
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| ------- value moved here
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@ -1,7 +1,5 @@
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// Test ensuring that `dbg!(expr)` requires the passed type to implement `Debug`.
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#![feature(dbg_macro)]
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struct NotDebug;
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fn main() {
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@ -1,5 +1,5 @@
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error[E0277]: `NotDebug` doesn't implement `std::fmt::Debug`
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--> $DIR/dbg-macro-requires-debug.rs:8:23
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--> $DIR/dbg-macro-requires-debug.rs:6:23
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LL | let _: NotDebug = dbg!(NotDebug);
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| ^^^^^^^^^^^^^^ `NotDebug` cannot be formatted using `{:?}`
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