92cb2f0300
## Motivation When the `instrument` attribute is used on a function with inner attributes, the proc macro generates code above the attributes within the function block that causes compilation errors. These should be parsed out separately and handled. Fixes #2294 ## Solution I updated `MaybeItemFn` and `MaybeItemFnRef` to so they hold both the outer and inner attributes for the instrumented function and updated the codegen to inlcude them in the appropriate locations. I couldn't preserve the existing implementation of `From<&'_ ItemFn> for MaybeItemFnRef<'_, Box<Block>>`, because it is now necessary to separate the inner and outer attributes of the `ItemFn` into two separate `Vec`s. That implementation was replaced with a `From<ItemFn> for MaybeItemFn`, which uses `Iterator::partition` to separate out the inner and outer attributes. Co-authored-by: Eliza Weisman <eliza@buoyant.io>
tracing-attributes
Macro attributes for application-level tracing.
Overview
tracing is a framework for instrumenting Rust programs to collect
structured, event-based diagnostic information. This crate provides the
#[instrument] attribute for automatically instrumenting functions using
tracing.
Note that this macro is also re-exported by the main tracing crate.
Compiler support: requires rustc 1.49+
Usage
First, add this to your Cargo.toml:
[dependencies]
tracing-attributes = "0.1.22"
This crate provides the #[instrument] attribute for instrumenting a function
with a tracing span. For example:
use tracing_attributes::instrument;
#[instrument]
pub fn my_function(my_arg: usize) {
// ...
}
Supported Rust Versions
Tracing is built against the latest stable release. The minimum supported version is 1.49. The current Tracing version is not guaranteed to build on Rust versions earlier than the minimum supported version.
Tracing follows the same compiler support policies as the rest of the Tokio project. The current stable Rust compiler and the three most recent minor versions before it will always be supported. For example, if the current stable compiler version is 1.45, the minimum supported version will not be increased past 1.42, three minor versions prior. Increasing the minimum supported compiler version is not considered a semver breaking change as long as doing so complies with this policy.
License
This project is licensed under the MIT license.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in Tokio by you, shall be licensed as MIT, without any additional terms or conditions.