summaryrefslogtreecommitdiffstats
path: root/tests/ui/macros/rfc-3086-metavar-expr/out-of-bounds-arguments.rs
blob: 6a0d68bd6b16a73ffb060d55f71ea384cc8a7803 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
#![feature(macro_metavar_expr)]

macro_rules! a {
    ( $( { $( [ $( ( $( $foo:ident )* ) )* ] )* } )* ) => {
        (
            ${count(foo, 0)},
            ${count(foo, 10)},
            //~^ ERROR depth parameter on meta-variable expression `count` must be less than 4
        )
    };
}

macro_rules! b {
    ( $( { $( [ $( $foo:ident )* ] )* } )* ) => {
        (
            $( $( $(
                ${ignore(foo)}
                ${index(0)},
                ${index(10)},
                //~^ ERROR depth parameter on meta-variable expression `index` must be less than 3
            )* )* )*
        )
    };
}

macro_rules! c {
    ( $( { $( $foo:ident )* } )* ) => {
        (
            $( $(
                ${ignore(foo)}
                ${length(0)}
                ${length(10)}
                //~^ ERROR depth parameter on meta-variable expression `length` must be less than 2
            )* )*
        )
    };
}

fn main() {
    a!( { [ (a) ] [ (b c) ] } );
    b!( { [ a b ] } );
    c!({ a });
}