The expander is implemented similarly in both Rust Analyzer and IntelliJ Rust. 2. rs, which. 4 Compiling once_cel. 1. You signed out in another tab or window. Step 08-unrecognized-attributes wants you to handle the car where the field modifier has a misspelled portion (eac instead of each)But you can implement the many_greetings! example as a procedural macro. ( proc_macro_span #54725) Returns the source text behind a span. I think we've seen this recently, but I don't remember if we tried to minimize this编译liquid合约出错 #20. 9. 0 error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/temaklin. 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. Syn operates on the token representation provided by the proc-macro2 crate from crates. toml文件中的依赖项，但该错误并没有告诉我是哪. ) simply bumping this ASAP should be adequate to address this. 3. I do not have a lot of experience using proc_macro, but based on this answer I found it was easy to adapt it to manually replace literals in the token tree without the use of the syn or quote crates. Procedural macros most often refer to their runtime library crate by assuming that a user of the procedural macro will have an explicit dependency on the library crate and does not rename the crate, allowing the procedural macro to emit extern crate library or use ::library paths. 1. 4. rs","contentType":"file"},{"name":"extra. This chapter will introduce Rust's declarative Macro-By-Example system by explaining the system as a whole. Ch. 58 Compiling tokio v1. Milestone. Basically whenever I change something, the whole function is marked as problematic. tl;dr; tokens produced by quote! use Span::call_site() when nightly is not enabled, and Span::def_site() when nightly is enabledrust-analyzer version: 3d63abf1d 2022-01-01 nightly rustc version: rustc 1. rust-analyzer Add a standalone rust-analyzer-proc-macro-srv binary. 2. src_hash_algorithm 1. Usually, the way to go is to have a Cargo feature in your macro that will change how it expands the code. 9 error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/dov/. nightly-2020-03-24 x86_64-unknown-none. Reload to refresh your session. use proc_macro::{TokenStream, TokenTree, Literal}; use. The span of the invocation of the current procedural macro. 4. This RFC is to gather final feedback on stabilizing the new feature resolver in Cargo. Internal ImprovementsSaved searches Use saved searches to filter your results more quicklyThe latest Fedora rust package fixes this. 6. Warning: the underlying proc_macro::Span::join method is nightly-only. ⓘLet’s now set up our crate so it can use the procedural macro features. They look and behave similarly to a match expression. com> - 1. Notifications Fork 11. The tracking issue for this feature is: #54725#54725pub fn source (&self) -> Span. Steps to reproduce: VSCode Version 1. 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. A span that resolves at the macro definition site. dwarf_version 1. I tried this code: // macros/src/lib. Reading The Rust Programming Language's chapter on macros says:. Reload to refresh your session. Copy link Owner Author. to_string () != "bool" { quote_spanned! { ty. Yes; I've recently downloaded the latest plugin version of mason. I faced similiar issue instead of installing Visual studio build tools for C++, I compiled the project in WSL2, it might be similiar to installing mingwin + stable-x86_64-pc-windows-gnu. @mati865 #69519 introduced different defaults for crt-static for executables (yes) and proc-macros (no) (should apply to all dylibs really). This is the git submodule => git subtree move. #11797 fix unwrap on a None value in proc macros built with Rust 1. proc_macro_quote; 3. The tracking issue for this feature is: None. It fails even for debug build. It seems that you are using the nightly version of rust, which we don't. 15. 60 appropriately address this. Procedural macros must be defined in a crate with the crate type of proc-macro. 0 LLVM version: 16. debug_info_for_profiling 1. I've started to learn Solana and I'm on the very beginning. The feature detection just checks RUSTFLAGS directly, which does not include configuration added by Cargo itself. 2. With the latest version of Rust (1. check_cfg 1. You switched accounts on another tab or window. 5. . 2. Types from proc_macro are entirely specific to procedural macros and cannot ever exist in code outside of a procedural macro. It must use the proc_macro2 crate in place of the proc_macro crate. @Alvra, by macro_rules you can't know about enum fields. 0 (f1edd0429 2021-11-29) I've verified that proc macro support is enabled by looking at the client logs: INFO [1/1/2022. rs and main. pub fn join (&self, other: Span) -> Option < Span >. Commit 81891f7 enabled attribute proc macro by default (released in v0. 0-nightly), compilation fails with this error: error[E0635]: unknown feature `proc_macro_span_shrink` --> /home/saverio/. Panics. Use an edition specific tag for questions that refer to code which requires a particular edition, like [rust-2018]. You signed out in another tab or window. Good to know: proc macro expansion is no longer supported in toolchains older than 1. codegen_backend 1. stable version below. 0-nightly (cae0791da 2023-10-05). Crate proc_macro. lizhuohua completed in #9 on Nov 11, 2022. Panics. value () function will give you a String with the contents of that literal. 9. py --board=nrf52840_dongle_dfu --erase_storage --programmer=nordicdfu", it goes wrong showing "error[E0635]: unknown feature 'proc_macro_span_shrink'". These features are not all blocked on implementing macro hygiene per se,. Summary. Solution is downgrading proc-macro2 to 1. control_flow_guard 1. AFAIK, it applies RUSTFLAGS only to. 2, and build as nightly i'm getting the following not sure if this is a problem that can be resolved at this level error[E0635]: unknown feature proc_macro_span_shrink --> C:Us. It errors out when encountering #[feature(proc_macro_span_shrink)], but it can be very easily fixed by switching the toolchain to stable: rustup default stable. branch_protection 1. 0-nightly (839e9a6e1 2023-07-02) You signed in with another tab or window. The rustc compiler has certain pluggable operations, that is, functionality that isn't hard-coded into the language, but is implemented in libraries, with a special marker to tell the compiler it exists. 0-nightly (794d0a825 2023-10-03), rustc 1. 10. 0 (90c541806 2023-05-31) I get the fol. . dump_mono_stats 1. In your case, we can write this: let output = if ty. These flavors mainly refer to the ways in which macros are implemented, not how they are used. Basically whenever I change something, the whole function is marked as problematic. 6. This setting is implied if #[proc_macro_error] is applied to a function marked as #[proc_macro], #[proc_macro_derive] or #[proc_macro_attribute]. 4. NOTE: Rust nightly toolchain is required. 📜 Source code examples. 1. error[E0635]: unknown feature proc_macro_span_shrink. gftea added a commit to gftea/amqprs that referenced this issue Jul 31, 2023. 57. mentioned this issue. 43 . ( proc_macro_span #54725) Returns the source text behind a span. 003b79d. control_flow_guard 1. rustup default stable-x86_64-pc-windows-msvc. Compiler flags; 1. nvim. We will polyfill those nightly-only APIs back to Rust 1. 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. e. 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. 0. 0. That is, if adding macros to a batch compiler takes X amount of work, making them play nicely with all IDE features takes X². , those with the same calling interface as a macro_rules! macro), are not yet supported in stable Rust, unless you use ::proc-macro-hack. Upgrading the toolchain to the latest version (rustup update) solves it (I tested with both rustc 1. error [E0635]:. Most of the time you want to use the macros. Ready to use solutions are available (see @timotree 's comment). A wrapper around the procedural macro API of the compiler’s proc_macro crate. Compiling ppv-lite86 v0. 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. I am working on the proc macro workshop and am a little stuck on the builder portion of the workshop. Macros come in two flavors: declarative and procedural. We get to execute arbitrary Rust code to figure out what to do with those tokens, then hand some tokens back to the compiler to compile into the user's crate. 4. rust-proc-macros; rust-analyzer; or ask your own question. cargo. 9. /target/debug/gtktest. Syntax is described in the next section below. 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/. (&self, other: Creates a new span with the same line/column information as but that resolves symbols as though it were at . 0" syn = "2. Reload to refresh your session. This library serves two purposes: Bring proc-macro-like functionality to other contexts like build. Reload to refresh your session. During attribute processing, active attributes remove themselves from the thing they are on while inert attributes stay on. How to pin-point where parsing failed and give appropriate error?A-macros Area: All kinds of macros (custom derive, macro_rules!, proc macros, . What is confusing to me is that this should have been fixed by dtolnay/proc-macro2#356, which shipped in proc-macro2 1. 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. 56 Compiling unicode-ident v1. 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,. attempt to fix dtolnay/proc-macro2#401. In the Cargo. A nice recent feature is that Rust will automatically adjust the number of jobs to the number of CPUs available to Docker, rather than the total physical CPUs of the machine (rust-lang/rust/97925, rust-lang/rust/100586). We expect to remove the limitation that the attribute must be specified with an absolute. 2023-05-31 host: x86_64-unknown-linux-gnu release: 1. This is possible as of Rust 1. You signed out in another tab or window. Unfortunately rust-lang/rust#60289 has revealed that proc-macro2 is using an unstable feature when it's built on nightly, which has broken those CI builds. You could also run the executable directly after building it: $ cargo build --bin gtktest --features gtk_3_10 $ . Crate 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. As with custom derives, procedural macros may only be declared in crates of the proc-macro type, and must be public functions. 10. That rendered rust-analyzer unusable in my case. Then it spawns that toolchain's rust-analyzer proc-macro subcommand and uses that, for this proc macro. Attribute macros - # [CustomAttribute] Procedural macros allow you to run code at compile time that operates over Rust syntax, both consuming and producing Rust syntax. but which directory is that? Are there any guarantees about which directory a procedural macro will run in? And how does that interact with workspaces. codegen_backend 1. So I am trying to build a rust project using cargo build and receive: error: failed to run `rustc` to learn about target-specific information Caused by: process didn't exit successfully: `rustc - --crate-name ___ --print=file-names -C -Zshare-generics=y -Csplit-debuginfo=unpacked --crate-type bin --crate-type rlib --crate-type dylib --crate. cargo/registry. You'll need to decide how you want to. The span of the invocation of the current procedural macro. This approach involved using the litrs crate to separate out the types of literals. rust: 1. Closed. In an attempt to execute #5 , I've begun on this skeleton of a SPI-implementing macro. 0. Reload to refresh your session. control_flow_guard 1. branch_protection 1. I've searched open issues for similar requests. There should be no space before the => token. Beginner picoMini 2022 / General skill / shell / python / nc. Reload to refresh your session. export_executable_symbols 1. branch_protection 1. 0. aarch64_ver_target_feature 2. codegen_backend 1. 29+ without semver exempt features. 19 is dedicated to macros. 73. The Rust Reference - explains the different types of macros and has got code samples for each of them. 59 and a specific version of Rust. /deploy. Summary. See rust-lang/miri#2406 for details, but the summary is: with a fully loaded build cache, when I start vscode, let RA do its start-up indexing, and then quite vsocde, now if I build my project again, there are crates that it needs to rebuild. 8. Fortunately, there is a way! The interpolation via # in quote! works via the ToTokens trait. Perhaps my favorite feature in the Rust 2018 edition is procedural macros. I'm having issues enabling proc-macro expansion for rust-analyzer in VS Code. 12. 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. We then add the required dependencies for writing a procedural macro in Rust. Actually it does. I'm getting the following error: error [E0635]: unknown feature `proc_macro_span_shrink` --> ~/. - Backport pr46592 to fix local_rebuild bootstrapping. 3. 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. Hi everyone! I am a newbie to Rust programming. I don't have the VSCode Rust extension installed. 19 error[E0635]: unknown feature proc_macro_span_shrink --> /root/. 50 Compiling quote v1. 61, which is the latest stable in time of writing. Yes; Problem description. A support library for macro authors when defining new macros. #11800 fix #[macro_use] no longer importing non-macro_rules! macros. Lib. e. 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. The . 61 with latest r-a. 0. Panics if called from outside of a procedural macro. 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. dtolnay closed this as completed Jul 28, 2023. 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. For anyone having errors here, please check your Rust Analyzer Language Server logs for. procMacro. 107 error[E0635]: unknown feature `proc_macro_span_shrink. An attribute is either active or inert. Context: input of proc_macro_attribute have invalid (null) span for some input. Alternatively, if you can place the code that requires the feature in your own crate (a helper. Reload to refresh your session. 70. alexcrichton changed the title Only the presence of futures-await regresses error-chain-derive TokenStream::parse does not resolve with Span::call_site () C-bug. samuelpilz March 20, 2020, 11:25am 1. 68 release, and is no longer necessary The sparse protocol is now the default for crates. You switched accounts on another tab or window. 59 Compiling getrandom v0. That process is called the expander. 47 Compiling proc-macro-hack v0. Reload to refresh your session. Meanwhile proc_macro2 types. Syntax is described in the next section below. lib. 5. This setting is also implied if proc-macro-hack was detected. Custom #[derive] macros that specify code added with the derive attribute used on structs and. Sign up Product1. io-6f17d22bba15001f/proc-macro2-1. You signed out in another tab or window. io Compiling autocfg v1. cf_protection 1. A support library for macro authors when defining new macros. 27 Compiling proc-macro2 v1. syn. 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 developersIf you want a bit more pure rust then you can enable the feature with-parity-db and it won't use rocksdb. Restart the language server. You signed out in another tab or window. 58/src/lib. enable": true in both my User and Workspace settings, but I still get the unresolved-proc-macro lint in the editor. 0. Reload to refresh your session. Repeat with any proc macros that need expanding (which may spawn several toolchains, if different cargo workspaces. If -C target-feature=+crt-static is specified explicitly, then the compiler respects it and overrides the defaults, that's the compiler's job. This is the output when compiling: >>> rust-server 0. 36 compiler. derive type macro give you the information about fields in enum/struct/union. 1 Rust-Analyzer Version 0. 8. A support library for macro authors when defining new macros. Rust. 15. This RFC proposes an evolution of Rust's procedural macro system (aka syntax extensions, aka compiler plugins). Closed drharryhe opened this issue Sep 11, 2023 · 4 comments Closed [bug] unknown feature proc_macro_span_shrink #7805. 0. You switched accounts on another tab or window. has the side effect of updating a generated file in the end-user project that describes and utimately creates a SQLite Person table. //! //! 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. Try setting the environment variable RA_LOG (either via terminal or by specifying rust-analyzer. the trait `From<proc_macro::Span>` is not implemented for `proc_macro2::Span` | = note: required because of the. Attribute-like macros that define custom attributes usable on any item. As far as function signatures go, a proc macro is a function from a TokenStream (or two) to another TokenStream, where the output replaces the macro invocation. 8. cf_protection 1. [lib] proc-macro = true. 15 Compiling hashbrown v0. Open Source. 0. With the current nightly version rustc 1. This enables code using Syn to execute outside of the context of a procedural macro, such as in unit tests or build. py build library/std compiler/rustc src/tools/cargo)' returned a non-zero code: 1As @Carl pointed out, You can fully debug proc macros by creating yet another project that your macro project refers to. Toggle navigation. I see you switched to renovate now but I wonder if it's working correctly, since I don't see. nix you can see we set up these env vars:. Identifiers created with this span will be resolved as if they were written directly at the macro call location (call-site hygiene) and other code at the macro call site will be able to refer to them as well. It links the dynamic library and uses the same interface as the compiler to interact with procedural macros. By default, nested invocations are not supported i. #11801 avoid returning None from Span::join to fix some. 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. We’ve used macros like println! throughout this book, but we haven’t fully explored what a macro is and how it works. 0 Compiling version_check v0. This RFC specifies the. status: needs triage This issue needs to triage, applied to new issues type: bug. This method is available when building with a nightly compiler, or when building with rustc 1. A support library for macro authors when defining new macros. 13. Compiler flags; 1. rs use proc_macro::TokenStream; use quote::quote; use syn::parse_macro_input; #[proc_macro_derive(use_self)] pub fn use_self. No other public items may be declared in proc-macro crates, but private items are fine. Unlike proc_macro2::Span, the proc_macro::Span type can only exist within the context of a procedural macro. pub fn report_literals_not_allowed(ident: &str, s: &Lit) -> TokenStream { syn::Error::new_spanned(ident, s. Our flag printing service has started glitching!Rust is a systems programming language without a garbage collector focused on three goals: safety, speed, and concurrency. 9. "] and there are various different values. py build --stage 1 src/librustc_llvm Warning: no rules matched /home/jessic. How to use. dylib_lto 1. Types from proc_macro are entirely specific to procedural macros and cannot ever exist in code outside of a procedural macro. That rendered rust-analyzer unusable in my case. Or how about a radically different, test driven, approach? The whole beauty of proc-macro2 is that while the API is compatible with proc-macro it's also usable outside of proc macros. The only thing is that, the compiler does not want any compiler unknown attributes on the final expanded struct. 1. Get early access and see previews of new features. cn-8f6827c7555bfaf8/proc-macro2-1. 72. When I view cargo tree I only see dependencies on 1. Since the compression program is written in Rust, I need to obtain the file path and cannot use the browser's drag and drop file feature. Meanwhile proc_macro2. 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 siteWhat could problematic is the macro somehow getting a span which "escapes" the macro (so, eg, the span for the whole file containing the macro) and querying the source of that, but I assume that's not possible. I am writing a library which includes a custom derive macro with custom attributes. This method is available when building with a nightly compiler, or when building with rustc 1. sanitizer 1. This preserves the original source code, including spaces and comments. log after the command runs complete, I did not found the content from build. 60. This crates a pull for languages to naturally evolve more complex macro systems than can be. The vast majority (99. 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. You can use Rust workspaces to organize all these projects. This library serves two purposes: Bring proc-macro-like functionality to other contexts like build. It will be a normal (non-macro) project that your macro will refer to. In Rust, there are two types of macros: declarative and procedural. 3. Meanwhile proc_macro2 types. You can replace the macro with parse2 instead if that's what you want. 3. 24. Diagnostic::spanned(span, Level::Error, text). Q&A for Solana software users and developersHi. You signed in with another tab or window. The following snippet fails to compile: playground. 71. rs. 57. This attribute performs the setup and cleanup necessary to make things work. A-proc-macros Area: Procedural macros A-resolve Area: Path resolution C-feature-request Category: A feature request, i. [root@qlh liquid]# cargo build Compiling proc-macro2 v1. 15. 1 and 1. The # [proc_macro] for function-like macros and # [proc_macro_derive] for custom derives work the same, except they only have one TokenStream argument. A support library for macro authors when defining new macros. 0 Compiling proc-macro-error-attr v1. rust-analyzer Introduce the sysroot ABI (disabled by default) rust Convert rust-analyzer to an in-tree tool. As a consequence of being specific to procedural macros. Contribute to gfxstrand/rust-proc-macro2 development by creating an account on GitHub. Development. Identifiers created with this span will be resolved as if they were written directly at the macro call location (call-site. #11805 don’t try to resolve methods on unknown types. rs and main. ) simply bumping this ASAP should be adequate to address this.