Yes, if you managed to minimize examle, it definitelly makes sense to open an issue to get a . proc_macro_hygiene. The span expression should be brief -- use a variable for anything more than a few characters. codegen_backend 1. 55 proc macro ABI for 1. The feature detection just checks RUSTFLAGS directly, which does not include configuration added by Cargo itself. alexcrichton added a commit to alexcrichton/rust that referenced this issue Oct 1, 2018. Types from proc_macro are entirely specific to procedural macros and cannot ever exist in code outside of a procedural macro. The tracking issue for this feature is: #87552#87552Tour 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 site## Problem `cargo +nightly doc` is giving a lot of warnings: broken links, naked URLs, etc. Unlike proc_macro2::Span, the proc_macro::Span type can only exist within the context of a procedural macro. The downside of having an option like rust-analyzer. The LSP allows various code editors, like VS Code, Emacs or Vim, to implement semantic features like. 63+?the issue has recently (quite literally since I started typing this up lol) been resolved within proc-macro2, and versions >=1. " Eventually, procedural macros will allow for all sorts of advanced metaprogramming in Rust, but today, they're only for custom derive. You signed in with another tab or window. proc_macro_span. 0" [lib] proc-macro =. 1. crates. Reload to refresh your session. 50/src/lib. crates. The span of the invocation of the current procedural macro. cargo/registry/src/github. aarch64_ver_target_feature 2. You switched accounts on another tab or window. They also differ in the ways the compiler and. proc_macro_span_shrink. This library serves two purposes: Bring proc-macro-like functionality to other contexts like build. proc-macro2. Codegen logs with RUST_LOG=debug environment variable Compiling proc-macro2 v1. source. 61 with latest r-a. log after the command runs complete, I did not found the content from build. 1. rs, when run in the. macro_rules allows users to define syntax extension in a declarative way. The crate compiles locally (as already done by cargo publish) and then is securely verified by a crates. Reload to refresh your session. fennel-language-server is unable to install. ERROR test_me % cargo build Compiling libc v0. You can find “real world” examples of both declarative and procedural macros in the r3bl_rs_utils crate. With the changes from #1555 we are now attempting to build with something equivalent to what will be the 1. Based on the nature of the DSL, it is not possible for me to use any Span from the input TokenStream. Contains a detailed walk-through on how to write a derive macro. lizhuohua completed in #9 on Nov 11, 2022. You are creating identifiers (in particular, f ) by using quote! . I want to generate prometheus metric by just annotating variables. 0. The cfg and cfg_attr attributes are active. move_size_limit 1. Empowering everyone to build reliable and efficient software. Custom #[derive] macros that specify code added with the derive attribute used on structs and. 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. proc_macro_internals; 3. Diagnostic::spanned(span, Level::Error, text). //# HELP auth label metric_type to create 2nd line. procMacro. , when not using the unstable ::proc_macro::quote! macro Yes, if you managed to minimize examle, it definitelly makes sense to open an issue to get a . Toggle navigation. The following snippet fails to compile: playground. Feature gate: #! [feature (proc_macro_span_shrink)] This feature adds span. 8. You'll need to decide how you. The proc_macro_attribute does not support other sub-attributes. 0. Meanwhile proc_macro2. I'm getting the following error: error [E0635]: unknown feature `proc_macro_span_shrink` --> ~/. Crate proc_macro. 71. This RFC specifies syntax for the definition of procedural macros, a high-level view of their implementation in the compiler, and outlines how they interact with the compilation process. pub fn f64_suffixed (n: f64) -> Literal. Hi, Just a heads up, it looks like there is an issue with the proc_macro_span_shrink feature in the rust 1. . In your case, we can write this: let output = if ty. Contribute to gfxstrand/rust-proc-macro2 development by creating an account on GitHub. (&self, other: Creates a new span with the same line/column information as but that resolves symbols as though it were at . 39 is used. Procedural macros have had a long and storied history in Rust (and will continue to have a storied future!), and now is perhaps one of the best times to get involved with them because the 2018 edition has so. 0 Compiling version_check v0. Feature gate: #! [feature (proc_macro_span_shrink)] This feature adds span. The Unstable Book; 1. 0. adding use proc_macro2::Span; makes this compile successfully. abi_amdgpu_kernel 2. pub fn source (&self) -> Span. rs and main. When rust-analyzer proc-macros are enabled, apparently the macro gets called for every keystroke, so if I edit the name of the struct to PersonTwo, I end up with Person, PersonT. This preserves the original source code, including spaces and comments. 63+? the issue has recently (quite literally since I started typing this up lol) been resolved within proc-macro2, and versions >=1. Follow asked Jan 31 at 16:14. dwarf_version 1. It seems that you are using the nightly version of rust, which we don't. py --board=nrf52840_dongle_dfu --erase_storage --programmer=nordicdfu", it goes wrong showing "error[E0635]: unknown feature 'proc_macro_span_shrink'". 1. Both ::proc-macro-hack and the need to sometimes export custom types or traits lead to the two-crate pattern. Usually, the way to go is to have a Cargo feature in your macro that will change how it expands the code. The problem has been fixed in 1. How to pin-point where parsing failed and give appropriate error?A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, . Cannot build - unknown feature `proc_macro_span_shrink`. toml conditional feature on optional dev dependency. I also had to pin proc-macros2 at =1. . I was expanding the struct within the #[component] macro but leaving as-is the #[prop] attribute. Function-like macros define macros that look like function calls. [bug] unknown feature proc_macro_span_shrink #7805. 7. drharryhe opened this issue Sep 11, 2023 · 4 comments Labels. Each macro by example has a name, and one or more rules. e. syn. What is confusing to me is that this should have been fixed by dtolnay/proc-macro2#356, which shipped in proc-macro2 1. Hi wang13245, I checked the issue and and can confirm it is associated with proc-macro2 v1. However, macro_rules! macros can be defined only using the. cargo/registry/src/index. ] square brackets around the input. You signed in with another tab or window. 6. One alternative is to have a special value for rust-analyzer. Panics if called from outside of a procedural macro. The marker is the attribute # [lang = ". crates. You switched. gftea added a commit to gftea/amqprs that referenced this issue Jul 31, 2023. io-6f17d22bba15001f/proc-macro2. However, with rust edition 2018 and dropping extern crate declarations from lib. You. json rust-toolchain. This RFC proposes an evolution of Rust's procedural macro system (aka syntax extensions, aka compiler plugins). 276. This attribute performs the setup and cleanup necessary to make things work. The following snippet fails to compile: playground. To produce a global. proc_macro_span. – oli_obk. We invite you to open a new topic if you have further questions or comments. branch_protection 1. Reload to refresh your session. Development. Home; News. The problem here is that println!("{}", file!()); is executed at compile time and not at runtime. 如题，出错信息如下： error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/wsl/. 0 Compiling proc-macro-error-attr v1. rs and main. {"payload":{"allShortcutsEnabled":false,"fileTree":{"library/proc_macro/src":{"items":[{"name":"bridge","path":"library/proc_macro/src/bridge","contentType. It must use the proc_macro2 crate in place of the proc_macro crate. export_executable_symbols 1. rustc --version --verbose. 1. check_cfg 1. This setting is implied if #[proc_macro_error] is applied to a function marked as #[proc_macro], #[proc_macro_derive] or #[proc_macro_attribute]. Most of the time you want to use the macros. The span for the origin source code that self was generated from. Creates a new suffixed floating-point literal. 0. This chapter will introduce Rust's declarative Macro-By-Example system by explaining the system as a whole. before () and span. self_profile 1. into()), "No literals allowed in the `macro` proc-macro" ). It seems that you are using the nightly version of rust, which we don't recommend using, as our project also aims at providing stability. 1 Answer. issue with loading proc-macro during rust bootstrapping - bootstrap-proc-macro-issue/README. proc_macro_expand; 3. 11. 768). Unlike proc_macro2::Span, the proc_macro::Span type can only exist within the context of a procedural macro. Similarly to macro_rules! macros, they’re more flexible than functions; for example, they can take an unknown number of arguments. enable": true in both my User and Workspace settings, but I still get the unresolved-proc-macro lint in the editor. 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. The rustc I compiled the same commit hash as 1. When emitting PTX code, all vanilla Rust functions (fn) get translated to "device" functions. 23 Compiling unicode-ident v1. Tracking issues are used to record the overall progress of implementation. rs: #! [feature (proc_macro_span) error [E0635]: unknown feature. 0. A proc-macro is at its core just a function exported from a crate with the proc-macro crate. cargo new --bin test rustup component add rust-src cargo install cargo-xbuild cd test ls test Cargo. 1. Help on spans for proc macros : r/rust. 9. 0. Meanwhile proc_macro2 types. 0-nightly (839e9a6e1 2023-07-02) You signed in with another tab or window. 19 is dedicated to macros. 2. The term macro refers to a family of features in Rust: declarative macro s with macro _rules! and three kinds of procedural macro s: Custom # [derive] macro s that specify code added with the derive attribute used on structs and enums. the code emitted by a proc-macro-hack macro invocation cannot contain recursive calls to the same proc-macro-hack macro nor calls to any other proc-macro-hack macros. NOTE: Rust nightly toolchain is required. cargo egistrysrcindex. Currently this library is geared toward use in Rust procedural macros, but contains some APIs that may be useful more generally. The Unstable Book; 1. 2. control_flow_guard 1. You can also generate custom functions if you wanted to. Reload to refresh your session. Internal ImprovementsSaved searches Use saved searches to filter your results more quicklyThe latest Fedora rust package fixes this. With the latest version of Rust (1. I've searched open issues for similar requests. rs uses first dash - this is the crate name in crates. 4. You obtain the Field struct by checking the syn::MacroInput 's body field for the Struct variant and then calling the fields method to obtain the list of Field s. In an attempt to execute #5 , I've begun on this skeleton of a SPI-implementing macro. {"payload":{"allShortcutsEnabled":false,"fileTree":{"src":{"items":[{"name":"detection. into_compile_error(). /target/debug/gtktest. Make it easy to use external-macro-backtrace cargo#6049; A quick skim of that ticket makes it sound like Cargo is explicitly reifying rustc flags, so one explanation for this UX. sanitizer 1. Which I interpret as using macro_rules, given that the hex proc macro is simply adding [. 字符串 我通过将我的rust版本设置为特定的较旧的夜间构建版本找到了一个修复方法，但这对另一个项目不起作用，我真的想要一个更好的解决方案。我假设我使用的是某个东西的过时版本，或者我可以删除cargo. 3. 2. When running deploy script(develop branch) to build openSK or erase_storage for nrf52840_dongle with ". 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. I had used a nightly version I had on hand, unaware that rustup should be used to install the project-specific version of the toolchain as specificied in the project's rust-toolchain file. 2. 1. . Meanwhile proc_macro2 types. Solution is downgrading proc-macro2 to 1. Which seems to be depending on syn. 0. 0 error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/temaklin. I am breaking my head against the wall trying to figure this one out. . 43 : cargo update -p proc-macro2 --precise 1. 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 # [proc. This enables code using Syn to execute outside of the context of a procedural macro, such as in unit tests or build. 59 and a specific version of Rust. A support library for macro authors when defining new macros. 61, which is the latest stable in time of writing. This is the git submodule => git subtree move. 0. Thanks for the video and code. You switched accounts on another tab or window. . IMO, it's always good to follow the latest Polkadot release CI's Rust toolchain. json rust-toolchain. This wouldn't be possible if vec! had to. 003b79d. The suggested fix is to keep your rust-analyzer updated. You switched accounts on another tab or window. I see you switched to renovate now but I wonder if it's working correctly, since I don't see. procMacro. toml. e1fb347. I tried this code: // macros/src/lib. control_flow_guard 1. server that's just the "rustup" string, but using an in-band value / picking "rustup" as a niche feels odd. Featured on Meta Update: New Colors Launched. Solution is downgrading proc-macro2 to 1. #11801 avoid returning None from Span::join to fix some. 9%+) of SpanData instances can be made to fit within. If you want to do this yourself, have more flexibility or learn, you can write a procedural macro that will parse a backtrace (obtained from inside the function that. 43 : cargo update -p proc-macro2 --precise 1. 13. codegen_backend 1. Functionality in proc_macro that is not yet stable is not exposed by proc-macro2 by default. i'm tring to making a time_it attribute like macro that can calculate the time of function execution like python decorators, i think i follow the steps in the rust book but the rust book is not clear enough it only goes with Derive macro only and skip the others. 71. These functions are not callable from the host via the CUDA API so a crate with only device functions is not too useful!. 0-nightly (83964c156 2023-07-08), I get error[E0635]: unknown feature 'proc_macro_span_shrink'. 如果 self 和 other 来自不同的文件，则返回 None 。. It had the following fixes in it. For instance, we can parse the previous token stream x + y into a binary expression, which is. jtmoon79 changed the title cargo build nightly fails: _error[E0635]: unknown feature proc_macro_span_shrink_ cargo build nightly fails: error[E0635]: unknown feature proc_macro_span_shrink Jul 4, 2023. 10. 0. 51 somewhere that needs to be bumped to 1. T-libs-api Relevant to the library API team, which will review and decide on the PR/issue. cargo/registry/src/index. 1. This approach involved using the litrs crate to separate out the types of literals. 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/. What is confusing to me is that this should have been fixed by dtolnay/proc-macro2#356, which shipped in proc-macro2 1. The syn crate provides parsing functionality. The term macro refers to a family of features in Rust: declarative macros with macro_rules! and three kinds of procedural macros:. Current strategy: Look for binops, calculate the type of the operands using cx. Version. 3. stable version below. At its core, rust-analyzer is a library for semantic analysis of Rust code as it changes over time. For anyone having errors here, please check your Rust Analyzer Language Server logs for. dump_mono_stats 1. noticed when i'm using a crate that relies on der-parsers 8. rust; Share. Reload to refresh your session. The span of the invocation of the current procedural macro. Add a comment |. Same as quote!, but applies a given span to all tokens originating within the macro invocation. This library serves two purposes: Bring proc-macro-like functionality to other contexts like build. location_detail 1. dump_mono_stats 1. 6. Which is failing to be built. Rust is a systems programming language without a garbage collector focused on three goals: safety, speed, and concurrency. 1. 14. We can accomplish this task through a feature of Rust called "procedural macros. Connect and share knowledge within a single location that is structured and easy to search. There should be no space before the => token. The Unstable Book; 1. 2. 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. Anchor build fails due to a current Rust version (1. (see dtolnay/proc-macro2#391 for additional context. Repository owner locked and limited conversation to collaborators Nov 16, 2023. 1 error[E0635]: unknown feature `proc_macro_span_shrink. You signed out in another tab or window. I even tried adding crate-type = ["rlib", "staticlib", "cdylib"] and to lib section and it still succeeded. @mati865 #69519 introduced different defaults for crt-static for executables (yes) and proc-macros (no) (should apply to all dylibs really). If you are using syn, then you can access the fields' attributes by accessing the attr field of the Field struct. 0. 9 Compiling num-traits v0. 2. It parses a TokenStream into a Rust Abstract Syntax Tree (AST), which is easier to work with than "raw tokens". 56 Compiling unicode-ident v1. 2. 0. Share. //! //! 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. 0" First, we declare our crate as a procedural macro crate. Please see. An attribute is either active or inert. crates. I was told that the rustup installer script at sh. Attribute-like macro s that define custom attributes usable on any item. //# TYPE auth_errors. io-managed service, conceptually similar to docs. Judging by this GitHub issue, and in particular this comment, it seems that proc macro expansion is quite dependent on the version of the Rust compiler. rs:92:30 | 92 | feature (proc_macro_span, proc_macro_span_shrink) | Just trying to use some p. The expander is implemented similarly in both Rust Analyzer and IntelliJ Rust. 10. dylib_lto 1. 15. 9. You switched accounts on another tab or window. Macros. Create an array of two elements 1) Identifier fooIdent (Ident::new ("foo", Span::mixed_site ())) 2) A group with round brackets in which we place the macro body Group (Group::new (Delimiter::Parenthesis, body)). So I used attribute proc macro and used it as a InnerAttribute( just did not want to write the attribute for each single function). - Backport pr46592 to fix local_rebuild bootstrapping. Could you try to bump your proc-macro2 version? Also, could you maybe provide either the full code or a smaller reproduction of the suggestion (if possible), I can't seem to reproduce the suggestion for your pattern on stable. 72. cargo. 15. 11. into() } Which reports exactly where the user is passing a literal, which is a feature not allowed in the arguments of the attribute. I'm having issues enabling proc-macro expansion for rust-analyzer in VS Code. Attribute-like macros that define custom attributes usable on any item. Error error[E0635]: unknown feature `proc. #11797 fix unwrap on a None value in proc macros built with Rust 1. In Rust, there are two types of macros: declarative and procedural. I've only written a few lines of Rust, and never a macro, so this is based on reading the relevant documentation and following the examples of the other macros in the directory (namely serial. However, when writing a #[proc_macro] macro, it is common to want to define a custom domain specific. 43 . Rusty_retiree_5659. 1. A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, . cargo build-bpf rustc version. A support library for macro authors when defining new macros.