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By using `token_descr`, as is done for many other errors, we can get slightly better descriptions in error messages, e.g. "macro expansion ignores token `let` and any following" becomes "macro expansion ignores keyword `let` and any tokens following". This will be more important once invisible delimiters start being mentioned in error messages -- without this commit, that leads to error messages such as "error at ``" because invisible delimiters are pretty printed as an empty string.
100 lines
3.5 KiB
Plaintext
100 lines
3.5 KiB
Plaintext
error: macro expansion ignores `;` and any tokens following
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--> $DIR/macro-context.rs:3:15
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LL | () => ( i ; typeof );
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| ^
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...
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LL | let a: m!();
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| ---- caused by the macro expansion here
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= note: the usage of `m!` is likely invalid in type context
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error: macro expansion ignores reserved keyword `typeof` and any tokens following
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--> $DIR/macro-context.rs:3:17
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LL | () => ( i ; typeof );
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| ^^^^^^
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...
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LL | let i = m!();
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| ---- caused by the macro expansion here
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= note: the usage of `m!` is likely invalid in expression context
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error: macro expansion ignores `;` and any tokens following
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--> $DIR/macro-context.rs:3:15
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LL | () => ( i ; typeof );
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| ^
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...
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LL | m!() => {}
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| ---- caused by the macro expansion here
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= note: the usage of `m!` is likely invalid in pattern context
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error: expected expression, found reserved keyword `typeof`
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--> $DIR/macro-context.rs:3:17
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LL | () => ( i ; typeof );
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| ^^^^^^ expected expression
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...
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LL | m!();
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| ---- in this macro invocation
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= note: this error originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
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error[E0412]: cannot find type `i` in this scope
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--> $DIR/macro-context.rs:3:13
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LL | () => ( i ; typeof );
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| ^ help: a builtin type with a similar name exists: `i8`
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...
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LL | let a: m!();
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| ---- in this macro invocation
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= note: this error originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
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error[E0425]: cannot find value `i` in this scope
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--> $DIR/macro-context.rs:3:13
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LL | () => ( i ; typeof );
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| ^ not found in this scope
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...
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LL | let i = m!();
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| ---- in this macro invocation
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= note: this error originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
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warning: trailing semicolon in macro used in expression position
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--> $DIR/macro-context.rs:3:15
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LL | () => ( i ; typeof );
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| ^
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...
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LL | let i = m!();
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| ---- in this macro invocation
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
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= note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
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= note: this warning originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 6 previous errors; 1 warning emitted
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Some errors have detailed explanations: E0412, E0425.
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For more information about an error, try `rustc --explain E0412`.
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Future incompatibility report: Future breakage diagnostic:
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warning: trailing semicolon in macro used in expression position
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--> $DIR/macro-context.rs:3:15
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LL | () => ( i ; typeof );
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| ^
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...
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LL | let i = m!();
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| ---- in this macro invocation
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= warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
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= note: for more information, see issue #79813 <https://github.com/rust-lang/rust/issues/79813>
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= note: `#[warn(semicolon_in_expressions_from_macros)]` on by default
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= note: this warning originates in the macro `m` (in Nightly builds, run with -Z macro-backtrace for more info)
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