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30 lines
1.2 KiB
Plaintext
30 lines
1.2 KiB
Plaintext
error: no rules expected the token `enum E {}`
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--> $DIR/nonterminal-matching.rs:19:10
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LL | macro complex_nonterminal($nt_item: item) {
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| --------------
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LL | macro n(a $nt_item b) {
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| --------------------- when calling this macro
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...
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LL | n!(a $nt_item b);
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| ^^^^^^^^ no rules expected this token in macro call
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...
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LL | complex_nonterminal!(enum E {});
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| ------------------------------- in this macro invocation
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note: while trying to match `enum E {}`
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--> $DIR/nonterminal-matching.rs:15:15
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LL | macro n(a $nt_item b) {
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| ^^^^^^^^
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...
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LL | complex_nonterminal!(enum E {});
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| ------------------------------- in this macro invocation
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= note: captured metavariables except for `:tt`, `:ident` and `:lifetime` cannot be compared to other tokens
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= note: see <https://doc.rust-lang.org/nightly/reference/macros-by-example.html#forwarding-a-matched-fragment> for more information
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= help: try using `:tt` instead in the macro definition
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= note: this error originates in the macro `complex_nonterminal` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 1 previous error
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