Code
macro_rules! foo {
($x;tt) => {};
}Current output
error: missing fragment specifier
--> src/bin/main.rs:2:6
|
2 | ($x;tt) => {};
| ^^
|
= note: fragment specifiers must be provided
= help: valid fragment specifiers are `ident`, `block`, `stmt`, `expr`, `pat`, `ty`, `lifetime`, `literal`, `path`, `meta`, `tt`, `item` and `vis`, along with `expr_2021` and `pat_param` for edition compatibility
help: try adding a specifier here
|
2 | ($x:spec;tt) => {};
| +++++Desired output
error: missing fragment specifier
--> src/bin/main.rs:2:6
|
2 | ($x;tt) => {};
| ^^
|
= note: fragment specifiers must be provided
= help: valid fragment specifiers are `ident`, `block`, `stmt`, `expr`, `pat`, `ty`, `lifetime`, `literal`, `path`, `meta`, `tt`, `item` and `vis`, along with `expr_2021` and `pat_param` for edition compatibility
help: try adding a specifier here
|
2 | ($x:spec;tt) => {};
| +++++
help: use a semicolon instead
|
2 - ($x;tt) => {};
2 + ($x:tt) => {};Rationale and extra context
No response
Other cases
Rust Version
rustc 1.95.0-nightly (a293cc4af 2026-01-30)
binary: rustc
commit-hash: a293cc4af8b26701c42738381c0c6f9d2ba881e0
commit-date: 2026-01-30
host: aarch64-unknown-linux-gnu
release: 1.95.0-nightly
LLVM version: 22.1.0
Anything else?
No response
Code
Current output
Desired output
Rationale and extra context
No response
Other cases
Rust Version
Anything else?
No response