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error: no rules expected the token `enum E {}`
--> $DIR/nonterminal-matching.rs:19:10
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LL | macro n(a $nt_item b) {
| --------------------- when calling this macro
...
LL | n!(a $nt_item b);
| ^^^^^^^^ no rules expected this token in macro call
...
LL | complex_nonterminal!(enum E {});
| ------------------------------- in this macro invocation
|
= note: this error originates in the macro `complex_nonterminal` (in Nightly builds, run with -Z macro-backtrace for more info)
error: aborting due to previous error
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