rust/src/test/ui/run-pass/issues/issue-47364.rs

// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// run-pass
// compile-flags: -C codegen-units=8 -O

fn main() {
    nom_sql::selection(b"x ");
}

pub enum Err<P>{
    Position(P),
    NodePosition(u32),
}

pub enum IResult<I,O> {
    Done(I,O),
    Error(Err<I>),
    Incomplete(u32, u64)
}

pub fn multispace<T: Copy>(input: T) -> ::IResult<i8, i8> {
    ::IResult::Done(0, 0)
}

mod nom_sql {
    fn where_clause(i: &[u8]) -> ::IResult<&[u8], Option<String>> {
        let X = match ::multispace(i) {
            ::IResult::Done(..) => ::IResult::Done(i, None::<String>),
            _ => ::IResult::Error(::Err::NodePosition(0)),
        };
        match X {
            ::IResult::Done(_, _) => ::IResult::Done(i, None),
            _ => X
        }
    }

    pub fn selection(i: &[u8]) {
        let Y = match {
            match {
                where_clause(i)
            } {
                ::IResult::Done(_, o) => ::IResult::Done(i, Some(o)),
                ::IResult::Error(_) => ::IResult::Done(i, None),
                _ => ::IResult::Incomplete(0, 0),
            }
        } {
            ::IResult::Done(z, _) => ::IResult::Done(z, None::<String>),
            _ => return ()
        };
        match Y {
            ::IResult::Done(x, _) => {
                let bytes = b";   ";
                let len = x.len();
                bytes[len];
            }
            _ => ()
        }
    }
}