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|
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct RemoteInput {
pub attrs: Vec<syn::Attribute>,
pub ident: syn::Type,
}
impl syn::parse::Parse for RemoteInput {
fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
let attrs = input.call(syn::Attribute::parse_outer)?;
let ident = input.parse::<syn::Type>()?;
Ok(RemoteInput { attrs, ident })
}
}
impl quote::ToTokens for RemoteInput {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
fn is_outer(attr: &&syn::Attribute) -> bool {
match attr.style {
syn::AttrStyle::Outer => true,
syn::AttrStyle::Inner(_) => false,
}
}
for attr in self.attrs.iter().filter(is_outer) {
attr.to_tokens(tokens);
}
self.ident.to_tokens(tokens);
}
}
#[cfg(test)]
mod test {
use syn::parse_quote;
//use syn::parse::Parse;
use super::*;
#[test]
fn test_input() {
let p: RemoteInput = parse_quote!(u64);
assert_eq!(
p,
RemoteInput {
attrs: vec![],
ident: parse_quote!(u64),
}
);
}
#[test]
fn test_input_attr() {
let p: RemoteInput = parse_quote!(
#[nix]
u64
);
assert_eq!(
p,
RemoteInput {
attrs: vec![parse_quote!(#[nix])],
ident: parse_quote!(u64),
}
);
}
#[test]
fn test_input_attr_multiple() {
let p: RemoteInput = parse_quote!(
#[nix]
#[hello]
u64
);
assert_eq!(
p,
RemoteInput {
attrs: vec![parse_quote!(#[nix]), parse_quote!(#[hello])],
ident: parse_quote!(u64),
}
);
}
#[test]
fn test_input_attr_full() {
let p: RemoteInput = parse_quote!(
#[nix(try_from = "u64")]
usize
);
assert_eq!(
p,
RemoteInput {
attrs: vec![parse_quote!(#[nix(try_from="u64")])],
ident: parse_quote!(usize),
}
);
}
#[test]
fn test_input_attr_other() {
let p: RemoteInput = parse_quote!(
#[muh]
u64
);
assert_eq!(
p,
RemoteInput {
attrs: vec![parse_quote!(#[muh])],
ident: parse_quote!(u64),
}
);
}
}
|
