pub fn my_proc_macro_derive(input: TokenStream)->TokenStream{//...} 这里增加了一个关键字attributes,并指定了属性的名字。详细情况可以看官方文档。示例代码里也有个例子,因为文章篇幅,我就不赘述了。 proc_macro_attribute(Attribute macros, 属性宏) 属性宏的函数签名类似如下: #[proc_macro_attribute] pub...
// attributes 可以加到 fields 上, 如果不需要可以不要这个 attributes#[proc_macro_derive(Builder, attributes(attr1, attr2,))]pubfnmy_builder(input: TokenStream)->TokenStream {letinput: syn::DeriveInput = syn::parse(input).unwrap();letsyn::Data::Struct(data) = input.dataelse{panic!("Sorry...
I was making a derive proc macro and stumbled upon this weird error, and was told on the rust discord that this might be a bug. Basically, I have a proc macro that uses a helper attribute like this: #[proc_macro_derive(Test,attributes(test_helper))]pubfnderive(input:TokenStream)->Toke...
Using #![feature(proc_macro)] in combination with attributes enabled by #[proc_macro_derive(MyTrait, attributes(mycrate))] (e.g. #[mycrate(some_option = "something")]) fails to compile on the current nightly with error: macro undefined: ...
源码:https://github.com/driftluo/cita-cli/blob/master/tool-derive/src/lib.rs#L14 externcrateproc_macro;externcrateproc_macro2;externcratesyn;#[macro_use]externcratequote;useproc_macro::TokenStream;usesyn::DeriveInput;#[proc_macro_derive(ContractExt, attributes(contract))]pubfncontract(input: ...
proc-macro-error proc-macro-error 的目标是使过程宏中的错误报告变得轻松便捷。 使用实例速览: useproc_macro_error::*;useproc_macro::TokenStream;usesyn::{spanned::Spanned, DeriveInput, ItemStruct, Fields, Attribute , parse_macro_input};usequote::quote;fnprocess_attrs(attrs: &[Attribute])->Vec...
using custom proc_macro with attributes written with darling in rust您需要指定#[table]是#[derive(...
If the process contains more than one thread, a representative thread is used to derive the lwpsinfo information. The file is formatted as a struct psinfo type and contains the following members: uint32_t pr_flag; /* process flags from proc struct p_flag */ uint32_t pr_flag2; /* ...
proc-macro-derive proc-macro-attribute 构建过程宏的必要设置 构建过程宏,要在cargo.toml里面设置一些参数,这是必须的。一般来说,过程宏必须是一个库,或者作为工程的子库,不能单独作为一个源文件存在,至少目前不行。 [lib] proc-macro = true path = "src/lib.rs" ...
然后是作为derive macro的一部分的attribute macro,大家多少都用过,我也就不多说了,这里直接写一下例子 #[proc_macro_derive(HelloWithAttributes, attributes(world))]pubfnderive_hello_with_attributes(_:TokenStream)->TokenStream{TokenStream::new()}