Use an edition specific tag for questions that refer to code which requires a particular edition, like [rust-2018]. A support library for macro authors when defining new macros. 51 somewhere that needs to be bumped to 1. 4,560 asked Oct 27 at 0:59 1 vote 2 answers 89 views How to tell why an "unknown feature" feature is needed? I'm getting the following error: error [E0635]: unknown. cargo. tracing::instrument causes rust-analyzer server to panic with. 9%+) of SpanData instances can be made to fit within. Same as quote!, but applies a given span to all tokens originating within the macro invocation. 5. 9. span. SpanData is 16 bytes, which is too big to stick everywhere. 🔬 This is a nightly-only experimental API. 0. 277. 0. Not the whole file, but it can certainly escape a single macro call, and can include totally unrelated items. emit_stack_sizes 1. Referenceerror[E0635]: unknown feature `proc_macro_span_shrink` Recently we have received many complaints from users about site-wide blocking of their own and blocking of their own activities please go to the settings off state,. To reference Rust variables, use 'var, as shown in the. 17 error[E0635]: unknown feature `proc_macro_span_shrink` --> C:Usersdhorner. cargo +nightly install racer. 31 tasks. 0. emit_stack_sizes 1. I am writing a library which includes a custom derive macro with custom attributes. Reload to refresh your session. When I view cargo tree I only see dependencies on 1. 0. 2. This attribute performs the setup and cleanup necessary to make things work. rs). Open Source. 5. 0a9c635. rs. e. A new ident can be created from a string using the Ident::new function. Q&A for Solana software users and developersConvert proc_macro2::Span to proc_macro::Span. 0 LLVM version: 16. (proc_macro_span #54725) The span for the origin source code that self was generated from. You can sort of think of procedural macros as functions from an AST to another AST. proc_macro_span. No API has been formally proposed for this feature. This library, provided by the standard distribution, provides the types consumed in the interfaces of procedurally defined macro definitions such as function-like macros # [proc_macro], macro attributes # [proc_macro_attribute] and custom. location_detail 1. 36 compiler. You can sort of think of procedural macros as functions from an AST to another AST. push (1); Type inference can go back and assign the right type to xs. cargo/registry/src/index. You can use Rust workspaces to organize all these projects. 2 cacilhas cacilhas NONE Posted 2 months ago error [E0635]: unknown feature `proc_macro_span_shrink` #113300 error [E0635]: unknown feature. dylib_lto 1. 57. io-6f17d22bba15001f/proc-macro2. When called from within a procedural macro not using a nightly compiler, this method will always return None. proc-macro2. A procedural macro that replaces all tagged instances of an identifier with a pluralized version of the same word. The tracking issue for this feature is: #54725#54725pub struct Span { lo_or_index: u32 , len_with_tag_or_marker: u16 , ctxt_or_parent_or_marker: u16 , } A compressed span. , those with the same calling interface as a macro_rules! macro), are not yet supported in stable Rust, unless you use ::proc-macro-hack. 0 Compiling proc-macro-error-attr v1. The crate name is with dash and that's how it needs to be specified in Cargo. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have You signed in with another tab or window. Get early access and see previews of new features. There is even a macro in quote which makes this easier: quote_spanned!. I'm trying to test building just librustc_llvm for the purposes of git bisecting, but am getting the following error: . 7. 9. 0 Compiling version_check v0. Development. error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/runner/. Types from proc_macro are entirely specific to procedural macros and cannot ever exist in code outside of a procedural macro. My project structure, thus, is as follows: ├── pg-worm │ ├── pg-worm-derive │ │ ├──. Most of the time you want to use the macros. You can easily do that with macro_rules! like this:2. Milestone. Related: extract_rust_hdl_interface, rust_hls, rust_hls, rust_hls_macro, rust_hls_macro_lib, wrap_verilog_in_rust_hdl_macro See also: cargo-careful, serde_spanned, rmp, queued, mpi, janus_messages, rmpv, prodash, crossbeam-channel, minitrace, cargo-all-features. : pub fn source_text (&self) -> Option < String > [src] [ −] 🔬 This is a nightly-only experimental API. You switched accounts on another tab or window. You switched accounts on another tab or window. 14. Yes; I've recently downloaded the latest plugin version of mason. . 15. No milestone. Function-like macros define macros that look like function calls. Use an edition specific tag for questions that refer to code which requires a particular edition, like [rust-2018]. It is fixed in proc-macro2 1. There are 3 kinds of hygiene (which can be seen by the constructors of the Span type): definition site ( unstable ): A span that resolves at the macro definition site. 43 due to it needing proc_macro_span_shrink from a later Rust version. cargo/registry/src/rsproxy. That rendered rust-analyzer unusable in my case. A wrapper around the procedural macro API of the compiler's proc_macro crate. Summary: you can't yet use hygienic identifiers with proc macros on stable Rust. Yes, if you managed to minimize examle, it definitelly makes sense to open an issue to get a . 9. During attribute processing, active attributes remove themselves from the thing they are on while inert attributes stay on. If we ever get proc macros 2. Here is a macro. 45. dump_mono_stats 1. rs:92:30 |. The term macro refers to a family of features in Rust: declarative macros with macro_rules! and three kinds of procedural macros: Custom # [derive] macros that specify code added with the derive attribute used on structs and enums. toml directly. Share. Moreover, a function-like procedural macro (i. 5. Hi, Just a heads up, it looks like there is an issue with the proc_macro_span_shrink feature in the rust 1. In cargo, it is possible to conditionally activate a feature on a dependency based on the main crate features, using the crate/feature syntax: [features] # Enables parallel processing support by. Reserves capacity in a collection for the given number of additional elements. io-6f17d22bba15001fproc-macro2. With the current nightly version rustc 1. Follow asked May 19 at 14:41. the trait `From<proc_macro::Span>` is not implemented for `proc_macro2::Span` | = note: required because of the. The problem has been fixed in 1. cargo/registry/src/index. toml rust-toolchain src x86_64-unknown-none. check_cfg 1. 2 [Optional] Relevant system information Windows / ndk: 25. Unable to compile substrate template `error: failed to run custom build command for `librocksdb-sys v0. Repository owner locked and limited conversation to collaborators Nov 16, 2023. unknown feature `proc_macro_span_shrink`//could not compile xxx lib问题解决，此解决方案不管是在哪一个系统都可以解决此问题。 rust 开发语言 一个在本地很久没有编译过的项目，或者说从网上下载下来了一个开源的项目，只要开始编译就会报unknown feture的错误，或者could not. Summary. Meanwhile proc_macro2. crates. 1 and 1. Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I haven't even tried to compile it yet. So the macro just needs to write the absolute path. The span expression should be brief -- use a variable for anything more than a few characters. A support library for macro authors when defining new macros. What happend Failed to install/compile latest taplo-cli (v0. You signed in with another tab or window. 3. cf_protection 1. use proc_macro::TokenStream; use syn:: {parse_macro_input, LitStr}; use quote::quote; # [proc_macro] pub fn my_macro (input. 4 Compiling lock_api v0. 0. 0. Macros are disproportionally hard to support in an IDE. Macros come in two flavors: declarative and procedural. 🔬 This is a nightly-only experimental API. No branches or pull requests. This library serves two purposes: Bring proc-macro-like functionality to other contexts like build. into() } Which reports exactly where the user is passing a literal, which is a feature not allowed in the arguments of the attribute. 15. After much messing around I think I have something that works, although I'm happy to accept other answers that are better as I feel this is a bit messy: extern crate proc_macro; use proc_macro2:: {Span, TokenStream}; use quote::quote; use syn:: {parse_macro_input, Attribute, DeriveInput, Ident, Result}; # [proc_macro_derive. This enables code using Syn to execute outside of the context of a procedural macro, such as in unit tests or build. Using Rust variables. AFAIK, it applies RUSTFLAGS only to. Each rule has two parts: a matcher, describing the syntax that it matches, and a transcriber , describing the syntax. attempt to fix dtolnay/proc-macro2#401. A wrapper around the procedural macro API of the compiler’s proc_macro crate. 0. 2 BacktraceThe term macro refers to a family of features in Rust: declarative macros with macro_rules! and three kinds of procedural macros: Custom # [derive] macros that specify code added with the derive attribute used on structs and enums. Attribute macros - # [CustomAttribute] Procedural macros allow you to run code at compile time that operates over Rust syntax, both consuming and producing Rust syntax. Fixes Issue #7 #9. Reload to refresh your session. Here, I use the s! macro in TensorBase as an example, which makes your writing C, Java like codes in your Rust sources in a free. You switched accounts on another tab or window. 43 due to it needing proc_macro_span_shrink from a later Rust version. 63+? the issue has recently (quite literally since I started typing this up lol) been resolved within proc-macro2, and versions >=1. rs). This happens when initialising a project with anchor. 5. The borsh and yew macros work fine for me on rustc 1. The Unstable Book; 1. 59 or above is needed, 1. 59/src/lib. Reload to refresh your session. lang_items. noticed when i'm using a crate that relies on der-parsers 8. 54. rustc fails with unknown feature proc_macro_span_shrink #113170. 3 Compiling lazy_static v1. In the Cargo. – oli_obk. error: could not compile `proc-macro-hack` due to 2 previous errors Build completed unsuccessfully in 0:04:28 The command '/bin/sh -c (cd rust && python3 x. Repeat with any proc macros that need expanding (which may spawn several toolchains, if different cargo workspaces. tls_model 2. 0. 278. TrendRadars. I even tried adding crate-type = ["rlib", "staticlib", "cdylib"] and to lib section and it still succeeded. cargo/registry/src/index. 0. 0 error[E0635]: unknown feature `proc_macro_span_shrink` -->. 0. You can also generate custom functions if you wanted to. I'm having issues enabling proc-macro expansion for rust-analyzer in VS Code. 58/src/lib. 0-nightly (cae0791da 2023-10-05). Copy link Owner Author. * and rust-analyzer. However, we can't yet expand macros into statements on stable -- that's what the #![feature(proc_macro_hygiene)] is for. rust: 1. This causes problems in environments where that configuration may change whether or not backtrace is available (or compiles):warning: flag `-Z sparse-registry` has been stabilized in the 1. rust; cargo; build-bpf; Share. 1. branch_protection 1. In that crate, create the implementation, annotated with # [proc_macro_attribute]. Procedural macros, on the other hand, allow you to operate on the abstract syntax tree (AST) of the Rust code it is given. Share. 0. Feature gate: #! [feature (proc_macro_span_shrink)] This feature adds span. procMacro. rs and main. A simple way is to write impl #impl_gen Trait for #ident #type_gen, the downside is everytime the caller must import Trait to scope. It fails even for debug build. This topic was automatically closed 90 days after the last reply. It sounds similarly. toml文件中的依赖项，但该错误并没有告诉我是哪. 3. 15. The first crate being rebuilt is libc. proc macros; decl macros; You can find all the pedagogical examples of macros shown in this article in this repo 🌟 Please star the r3bl-open-core repo on github if you like it 🙏. Panics. pub fn source_text (&self) -> Option < String > [src] [ −] 🔬 This is a nightly-only experimental API. . 408 git clone Methodical Introduction. Syntax. A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, . Ah, I used the "full" feature set from Tokio. In procedural macros there is currently no easy way to get this path. They also differ in the ways the compiler and. 0-nightly (839e9a6e1 2023-07-02) You signed in with another tab or window. It is fixed in proc-macro2 1. 47 error[E0635]: unknown feature `proc_macro_span_shrink` --> . Also using winget you can install rust both for msvc or gnu. Ready to use solutions are available (see @timotree 's comment). I'm getting the following error: error[E0635]: unknown feature `proc_macro_span_shrink` --> ~/. 8. You switched. You signed in with another tab or window. 4. The following snippet fails to compile: playground. 0. Based on the nature of the DSL, it is not possible for me to use any Span from the input TokenStream. By developing foundational libraries like syn and quote against proc_macro2 rather than proc_macro, the procedural macro ecosystem becomes easily applicable to many other use cases and we avoid reimplementing non-macro equivalents of those libraries. 10. Access private key data account or program from within Anchor program. Question: how to re-write this macro in normal module? It sounds a bit like you're asking how you can express it as a macro in a "normal" module. 13. proc_macro_span. dump_mono_stats 1. Sorry for the inconvenience. Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this siteThis feature flag guards the new procedural macro features as laid out by RFC 1566, which alongside the now-stable custom derives, provide stabilizable alternatives to the compiler plugin API (which requires the use of perma-unstable internal APIs) for programmatically modifying Rust code at compile-time. Motivation. 3. report_time 1. Version. 1. The following snippet fails to compile: playground. 0" [lib] proc-macro =. 4. This caused the compiler to search for meaning for. toml文件中的依赖项，但该错误并没有告诉我是哪. This library, provided by the standard distribution, provides the types consumed in the interfaces of procedurally defined macro definitions such as function-like macros # [proc_macro], macro attributes # [proc_macro_attribute] and custom derive attributes. lizhuohua added a commit that referenced this issue on Nov 11, 2022. These features are not all blocked on implementing macro hygiene per se,. 61 with latest r-a. The output of this proc-macro is the same as its input so foo!(x + y) expands into x + y. The feature gate for the issue is #![feature(proc_macro_is_available)]. A support library for macro authors when defining new macros. crates. Compile error: rror[E0635]: unknown feature `proc_macro_span_shrink` --> /Users/xus/. 9 Compiling memoffset v0. Closed drharryhe opened this issue Sep 11, 2023 · 4 comments Closed [bug] unknown feature proc_macro_span_shrink #7805. Feature Name: proc_macro_sandbox Start Date: 2023-08-20 Summary Procedural macro crates can opt-in to precompilation to WebAssembly as part of the publish process. 0. I'm not familiar w/ the rust build system, but I was able to fix this. I'm having issues enabling proc-macro expansion for rust-analyzer in VS Code. 8. On the current nightly (1. 2023-05-31 host: x86_64-unknown-linux-gnu release: 1. cargo/registry. io-6f17d22bba15001f/proc-macro2. 3. 1 hygiene works; however, the derive macros are stable, so this is an undesirable thing. 8. This token will. How to use. 003b79d. MSVC. We expect to remove the limitation that the attribute must be specified with an absolute. 0" quote = "1. So when I clone the proc_macro2 repo and do a cargo build --release it completes successfully. 13. This setting is implied if #[proc_macro_error] is applied to a function marked as #[proc_macro], #[proc_macro_derive] or #[proc_macro_attribute]. Ah, I used the "full" feature set from Tokio. When defining a procedural macro it is possible to control the span of identifiers in order to bypass hygiene, but as far as I can tell there is no way for a procedural macro to define a new procedural macro. mentioned this issue. Meanwhile proc_macro2. into()), "No literals allowed in the `macro` proc-macro" ). . 0 · source. Modify the. 768). stable version below. error[E0635]: unknown feature proc_macro_span_shrink. . crates. Please see this wiki page for instructions on how to get full permissions. (proc_macro_span #54725) 创建一个包含 self 和 other 的新跨度。. Macros. This setting is also implied if proc-macro-hack was detected. rs and main. 15 Compiling hashbrown v0. proc_macro_internals; 3. py build --stage 1 src/librustc_llvm Warning: no rules matched /home/jessic. server. Procedural macros must be defined in a crate with the crate type of proc-macro. This library, provided by the standard distribution, provides the types consumed in the interfaces of procedurally defined macro definitions such as function-like macros # [proc_macro], macro attributes # [proc_macro_attribute] and custom derive attributes. 3. The Most Interesting Articles, Mysteries and Discoveries. rust-proc-macros; rust-analyzer; or ask your own question. //# HELP auth label metric_type to create 2nd line. The issue of attribute macros invoked at the crate root is being tracked in rust-lang/rust#41430. Cannot build - unknown feature `proc_macro_span_shrink`. A span that represents macro_rules hygiene, and sometimes resolves at the macro definition site (local variables, labels, $crate) and sometimes at the macro call site. before () and span. This preserves the original source code, including spaces and comments. Attribute macros are active. 0 (90c541806 2023-05-31) I get the fol. 70. toml. Please see. They are also uses as hubs connecting to other relevant issues, e. A match expression takes as input an expression and matches it with a set. /target/debug/gtktest. Types from proc_macro are entirely specific to procedural macros and cannot ever exist in code outside of a procedural macro. server that's just the "rustup" string, but using an in-band value / picking "rustup" as a niche feels odd. When emitting PTX code, all vanilla Rust functions (fn) get translated to "device" functions. rs, and we avoid needing incompatible ecosystems. rust#98223. Yes; Problem description. Unlike proc_macro2::Span, the proc_macro::Span type can only exist within the context of a procedural macro. control_flow_guard 1. ) A-proc-macros Area: Procedural macros C-enhancement Category: An issue proposing an enhancement or a PR with one. jsonAnd it turns out that this is the same thing that has happened with your from_byte identifier: your code was emitting a from_byte with private hygiene / a def_site() span, which is something that normally never happens for method names when using classic macros, or classic proc-macros (i. In an attempt to execute #5 , I've begun on this skeleton of a SPI-implementing macro. I also had to pin proc-macros2 at =1. Compiler flags; 1. Reload to refresh your session. Contribute to gfxstrand/rust-proc-macro2 development by creating an account on GitHub. This is the output when compiling: >>> rust-server 0. This is why it's possible to write things like: let mut xs = vec! []; xs. 2. cargo new --bin test rustup component add rust-src cargo install cargo-xbuild cd test ls test Cargo. 9. span () => compile_error! ("expected bool"); } } else { quote! { const #name: #ty = false; } }; For your faulty input, the compiler now prints this: Q&A for Solana software users and developers error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/runner/. Data structures — Syn provides a complete syntax tree that can represent any valid Rust source code. 🔬 This is a nightly-only experimental API. md at main · krasimirgg/bootstrap-proc-macro-issueThe nightly has introduced “Procedural Macro Diagnostics” APIs [3] under the feature “proc_macro_diagnostic” as friendly diag-info-show tool which is seamlessly integrated into the proc macro output. 15 Compiling crossbeam-utils v0. 11. I tried this code: // macros/src/lib. emit_stack_sizes 1. Crate proc_macro. Can anybody help me with my issue?. rs with this. 8. Compiling proc-macro2 v1. 0. Language features 2. 0. crates. Use input. crates. Reload to refresh your session. status: needs triage This issue needs to triage, applied to new issues type: bug. 1. **This attribute MUST be present on the top level of your macro** (the function //! annotated with any of `#[proc_macro]`, `#[proc_macro_derive]`, `#[proc_macro_attribute]`).