tests/ui/rfcs/rfc-2294-if-let-guard/macro-expanded.rs


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// Expression macros can't expand to a let match guard.

#![feature(if_let_guard)]
#![feature(let_chains)]

macro_rules! m {
    ($e:expr) => { let Some(x) = $e }
    //~^ ERROR expected expression, found `let` statement
}

fn main() {
    match () {
        () if m!(Some(5)) => {}
        _ => {}
    }
}