doc attributes on macro invocations can contain arbitrary expressions
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@mejrs is already working on this.
Since Aug 11, 2026.
A-attributes
C-bug
T-compiler
T-lang
- Dominant language
- Rust
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Description
I tried this code:
fn main() {
#[doc = {
let a = 1;
let b = 1;
let sum = a + b;
assert_eq!(sum, 2);
}]
println!();
}
I expected to see this happen: compiler error
Instead, this happened: program compiles, no diagnostic issued
This works on rust 1.94 and newer.
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