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``` error: cannot find attribute `empty_helper` in this scope --> $DIR/derive-helper-legacy-limits.rs:17:3 | LL | #[empty_helper] | ^^^^^^^^^^^^ | help: `empty_helper` is an attribute that can be used by the derive macro `Empty`, you might be missing a `derive` attribute | LL + #[derive(Empty)] LL | struct S2; | ``` Look at proc-macro attributes when encountering unknown attribute ``` error: cannot find attribute `sede` in this scope --> src/main.rs:18:7 | 18 | #[sede(untagged)] | ^^^^ | help: the derive macros `Serialize` and `Deserialize` accept the similarly named `serde` attribute | 18 | #[serde(untagged)] | ~~~~~ error: cannot find attribute `serde` in this scope --> src/main.rs:12:7 | 12 | #[serde(untagged)] | ^^^^^ | = note: `serde` is in scope, but it is a crate, not an attribute help: `serde` is an attribute that can be used by the derive macros `Serialize` and `Deserialize`, you might be missing a `derive` attribute | 10 | #[derive(Serialize, Deserialize)] | ```
20 lines
384 B
Rust
20 lines
384 B
Rust
//@ force-host
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//@ no-prefer-dynamic
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#![crate_type = "proc-macro"]
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#![feature(proc_macro_quote)]
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extern crate proc_macro;
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use proc_macro::*;
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#[proc_macro_derive(Serialize, attributes(serde))]
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pub fn serialize(ts: TokenStream) -> TokenStream {
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quote!{}
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}
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#[proc_macro_derive(Deserialize, attributes(serde))]
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pub fn deserialize(ts: TokenStream) -> TokenStream {
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quote!{}
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}
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