coverage_attribute

The tracking issue for this feature is: #84605

The coverage attribute can be used to selectively disable coverage instrumentation in an annotated function. This might be useful to:

• Avoid instrumentation overhead in a performance critical function
• Avoid generating coverage for a function that is not meant to be executed, but still target 100% coverage for the rest of the program.

Example

#![allow(unused)]
#![feature(coverage_attribute)]

fn main() {
// `foo()` will get coverage instrumentation (by default)
fn foo() {
  // ...
}

#[coverage(off)]
fn bar() {
  // ...
}
}