error: prefix `hey` is unknown
  --> $DIR/reserved-prefixes-via-macro-2.rs:15:5
   |
LL |     m2021::number_of_tokens_in_a_prefixed_integer_literal!();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unknown prefix
   |
   = note: prefixed identifiers and literals are reserved since Rust 2021
   = note: this error originates in the macro `m2021::number_of_tokens_in_a_prefixed_integer_literal` (in Nightly builds, run with -Z macro-backtrace for more info)

error: prefix `hey` is unknown
  --> $DIR/reserved-prefixes-via-macro-2.rs:17:5
   |
LL |     m2021::number_of_tokens_in_a_prefixed_char_literal!();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unknown prefix
   |
   = note: prefixed identifiers and literals are reserved since Rust 2021
   = note: this error originates in the macro `m2021::number_of_tokens_in_a_prefixed_char_literal` (in Nightly builds, run with -Z macro-backtrace for more info)

error: prefix `hey` is unknown
  --> $DIR/reserved-prefixes-via-macro-2.rs:19:5
   |
LL |     m2021::number_of_tokens_in_a_prefixed_string_literal!();
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unknown prefix
   |
   = note: prefixed identifiers and literals are reserved since Rust 2021
   = note: this error originates in the macro `m2021::number_of_tokens_in_a_prefixed_string_literal` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 3 previous errors