1 | use syn::{ |
2 | parse::{self, Parse, ParseStream}, |
3 | punctuated::Punctuated, |
4 | Expr, LitStr, Token, |
5 | }; |
6 | |
7 | pub(crate) struct Args { |
8 | pub(crate) format_string: LitStr, |
9 | pub(crate) formatting_args: Option<Punctuated<Expr, Token![,]>>, |
10 | } |
11 | |
12 | impl Parse for Args { |
13 | fn parse(input: ParseStream) -> parse::Result<Self> { |
14 | Ok(Self { |
15 | format_string: input.parse()?, |
16 | formatting_args: if input.is_empty() { |
17 | None |
18 | } else { |
19 | let _comma: Token![,] = input.parse()?; |
20 | Some(Punctuated::parse_terminated(input)?) |
21 | }, |
22 | }) |
23 | } |
24 | } |
25 | |