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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use syn::{
parse::{Parse, ParseStream},
punctuated::Punctuated,
Error, Ident, Result, Token,
};
#[derive(Copy, Clone, Debug, Default)]
pub struct Attributes {
pub is_unstable: bool,
pub is_v8: bool,
pub must_be_fast: bool,
pub deferred: bool,
}
impl Parse for Attributes {
fn parse(input: ParseStream) -> Result<Self> {
let vars = Punctuated::<Ident, Token![,]>::parse_terminated(input)?;
let vars: Vec<_> = vars.iter().map(Ident::to_string).collect();
let vars: Vec<_> = vars.iter().map(String::as_str).collect();
for var in vars.iter() {
if !["unstable", "v8", "fast", "deferred"].contains(var) {
return Err(Error::new(
input.span(),
"invalid attribute, expected one of: unstable, v8, fast, deferred",
));
}
}
Ok(Self {
is_unstable: vars.contains(&"unstable"),
is_v8: vars.contains(&"v8"),
must_be_fast: vars.contains(&"fast"),
deferred: vars.contains(&"deferred"),
})
}
}
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