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d5634164cb
Closes https://github.com/denoland/deno/issues/2699 Closes https://github.com/denoland/deno/issues/2347 Uses unstable rustfmt features. Since dprint invokes `rustfmt` we do not need to switch the cargo toolchain to nightly. Do we care about formatting stability of our codebase across Rust versions? (I don't)
44 lines
1.2 KiB
Rust
44 lines
1.2 KiB
Rust
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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use syn::parse::Parse;
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use syn::parse::ParseStream;
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use syn::punctuated::Punctuated;
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use syn::Error;
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use syn::Ident;
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use syn::Result;
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use syn::Token;
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#[derive(Copy, Clone, Debug, Default)]
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pub struct Attributes {
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pub is_unstable: bool,
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pub is_v8: bool,
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pub must_be_fast: bool,
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pub deferred: bool,
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pub is_wasm: bool,
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}
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impl Parse for Attributes {
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fn parse(input: ParseStream) -> Result<Self> {
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let vars = Punctuated::<Ident, Token![,]>::parse_terminated(input)?;
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let vars: Vec<_> = vars.iter().map(Ident::to_string).collect();
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let vars: Vec<_> = vars.iter().map(String::as_str).collect();
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for var in vars.iter() {
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if !["unstable", "v8", "fast", "deferred", "wasm"].contains(var) {
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return Err(Error::new(
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input.span(),
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"invalid attribute, expected one of: unstable, v8, fast, deferred, wasm",
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));
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}
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}
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let is_wasm = vars.contains(&"wasm");
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Ok(Self {
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is_unstable: vars.contains(&"unstable"),
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is_v8: vars.contains(&"v8"),
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deferred: vars.contains(&"deferred"),
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must_be_fast: is_wasm || vars.contains(&"fast"),
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is_wasm,
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})
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}
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}
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