linux/rust
Niklas Mohrin bee1688940 rust: std_vendor: add dbg! macro based on std's one
The Rust standard library has a really handy macro, `dbg!` [1,2].
It prints the source location (filename and line) along with the raw
source code that is invoked with and the `Debug` representation
of the given expression, e.g.:

    let a = 2;
    let b = dbg!(a * 2) + 1;
    //      ^-- prints: [src/main.rs:2] a * 2 = 4
    assert_eq!(b, 5);

Port the macro over to the `kernel` crate inside a new module
called `std_vendor`, using `pr_info!` instead of `eprintln!` and
make the rules about committing uses of `dbg!` into version control
more concrete (i.e. tailored for the kernel).

Since the source code for the macro is taken from the standard
library source (with only minor adjustments), the new file is
licensed under `Apache 2.0 OR MIT`, just like the original [3,4].

Link: https://doc.rust-lang.org/std/macro.dbg.html [1]
Link: https://github.com/rust-lang/rust/blob/master/library/std/src/macros.rs#L212 [2]
Link: https://github.com/rust-lang/rust/blob/master/library/std/Cargo.toml [3]
Link: https://github.com/rust-lang/rust/blob/master/COPYRIGHT [4]
Signed-off-by: Niklas Mohrin <dev@niklasmohrin.de>
[Reworded, adapted for upstream and applied latest changes]
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
2022-12-04 01:59:16 +01:00
..
alloc rust: alloc: add Vec::try_with_capacity{,_in}() constructors 2022-12-04 01:59:15 +01:00
bindings rust: add bindings crate 2022-09-28 08:58:00 +02:00
kernel rust: std_vendor: add dbg! macro based on std's one 2022-12-04 01:59:16 +01:00
macros rust: macros: take string literals in module! 2022-12-04 01:59:15 +01:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
bindgen_parameters Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
compiler_builtins.rs rust: add compiler_builtins crate 2022-09-28 08:58:00 +02:00
exports.c rust: export generated symbols 2022-09-28 08:59:52 +02:00
helpers.c
Makefile Kbuild: add Rust support 2022-09-28 09:02:20 +02:00