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https://github.com/rust-lang/rust
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bca5cd3a9d
To involve `macro_rules!` macros, and also a mix of fragment specifiers, some of which feature the forwaring limitation and some of which don't.
116 lines
4.7 KiB
Plaintext
116 lines
4.7 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 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: no rules expected the token `3`
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--> $DIR/nonterminal-matching.rs:32:35
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LL | (expr $x:expr) => { bar!(expr $x); };
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| ^^ no rules expected this token in macro call
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...
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LL | macro_rules! bar {
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| ---------------- when calling this macro
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...
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LL | foo!(expr 3);
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| ------------ in this macro invocation
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note: while trying to match `3`
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--> $DIR/nonterminal-matching.rs:42:11
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LL | (expr 3) => {};
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| ^
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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 `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: no rules expected the token `4`
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--> $DIR/nonterminal-matching.rs:33:44
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LL | (literal $x:literal) => { bar!(literal $x); };
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| ^^ no rules expected this token in macro call
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...
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LL | macro_rules! bar {
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| ---------------- when calling this macro
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...
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LL | foo!(literal 4);
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| --------------- in this macro invocation
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note: while trying to match `4`
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--> $DIR/nonterminal-matching.rs:43:14
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LL | (literal 4) => {};
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| ^
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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 `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: no rules expected the token `a::b::c`
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--> $DIR/nonterminal-matching.rs:34:35
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LL | (path $x:path) => { bar!(path $x); };
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| ^^ no rules expected this token in macro call
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...
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LL | macro_rules! bar {
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| ---------------- when calling this macro
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...
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LL | foo!(path a::b::c);
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| ------------------ in this macro invocation
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note: while trying to match `a`
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--> $DIR/nonterminal-matching.rs:44:11
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LL | (path a::b::c) => {};
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| ^
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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 `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: no rules expected the token `let abc = 0`
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--> $DIR/nonterminal-matching.rs:35:35
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LL | (stmt $x:stmt) => { bar!(stmt $x); };
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| ^^ no rules expected this token in macro call
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...
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LL | macro_rules! bar {
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| ---------------- when calling this macro
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...
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LL | foo!(stmt let abc = 0);
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| ---------------------- in this macro invocation
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note: while trying to match `let`
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--> $DIR/nonterminal-matching.rs:45:11
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LL | (stmt let abc = 0) => {};
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| ^^^
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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 `foo` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 5 previous errors
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