cgp-macro-lib 0.7.0

Context-generic programming core component macros implemented as a library.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

use quote::ToTokens;
use syn::parse::{Parse, ParseStream};
use syn::token::Lt;
use syn::{AngleBracketedGenericArguments, Ident};

#[derive(Clone)]
pub struct SimpleType<Generics = AngleBracketedGenericArguments> {
    pub name: Ident,
    pub generics: Option<Generics>,
}

impl<Generics> Parse for SimpleType<Generics>
where
    Generics: Parse,
{
    fn parse(input: ParseStream) -> syn::Result<Self> {
        let name: Ident = input.parse()?;
        let generics = if input.peek(Lt) {
            Some(input.parse()?)
        } else {
            None
        };

        Ok(Self { name, generics })
    }
}

impl ToTokens for SimpleType {
    fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
        self.name.to_tokens(tokens);
        self.generics.to_tokens(tokens);
    }
}