Function call2_for_syn::call2_strict

pub fn call2_strict<T, P: FnOnce(ParseStream<'_>) -> T>(
    input: TokenStream, 
    parser: P
) -> stdResult<T, Incomplete<T>>

Analogous to syn::parse2 and syn::parse::ParseBuffer::call.

Errors

Iff not all of input is consumed by parser.
parser's result is still returned in the error value, in this case.

Examples

use call2_for_syn::call2_strict;
use quote::quote;
use syn::{Ident, Token};

let (hello, world) = call2_strict(quote!(Hello world!), |input| {
    let hello: Ident = input.parse()?;
    let world: Ident = input.parse()?;
    // input.parse::<Token![!]>()?;
    syn::Result::Ok((hello, world))
}).unwrap_err().parsed?;

assert_eq!(format!("{}", hello), "Hello");
assert_eq!(format!("{}", world), "world");

use call2_for_syn::call2_strict;
use quote::quote;
use syn::{Ident, Token};

let (hello, world) = call2_strict(quote!(Hello world!), |input| {
    let hello: Ident = input.parse()?;
    let world: Ident = input.parse()?;
    input.parse::<Token![!]>()?;
    syn::Result::Ok((hello, world))
})??;

assert_eq!(format!("{}", hello), "Hello");
assert_eq!(format!("{}", world), "world");