Parse error with unsafe expression

[eqrion]

Tested with syn 0.11.11.

// test.rs
pub fn test() {
    for i in 1 .. unsafe { 100 } {
        println!("{:?}", i);
    }
}

// main.rs
extern crate syn;

fn main() {
    syn::parse_crate(include_str!("test.rs")).unwrap();
}

Output:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: "failed to parse crate: \"pub fn test() {\\n    for i in 1 .. unsafe { 100 } {\\n        println!(\\\"{:?}\\\", i);\\n    }\\n}\\n\""', /checkout/src/libcore/result.rs:906:4

Changing unsafe { 100 } to be just 100 fixes the issue.

The attached rust (test.rs) compiles fine (with rustc 1.22 nightly), so I think it should be able to be parsed by syn.

Thanks for the great library!

[mystor]

The problem here is that we parse unsafe {} in the same parser as we parse {}, and in that position a normal, non-unsafe, block would not be allowed to be parsed, but an unsafe block would.

We'll need to split up the parsers for unsafe {} and {} so that we don't have to guard both.

[eqrion]

Thanks!