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|
//@ edition:2024
// ignore-tidy-linelength
macro_rules! demo1 {
( $a:tt ) => { println!("one tokens") };
}
macro_rules! demo2 {
( $a:tt $b:tt ) => { println!("two tokens") };
}
macro_rules! demo3 {
( $a:tt $b:tt $c:tt ) => { println!("three tokens") };
}
macro_rules! demo4 {
( $a:tt $b:tt $c:tt $d:tt ) => { println!("four tokens") };
}
macro_rules! demo5 {
( $a:tt $b:tt $c:tt $d:tt $e:tt ) => { println!("five tokens") };
}
macro_rules! demo6 {
( $a:tt $b:tt $c:tt $d:tt $e:tt $f:tt ) => { println!("six tokens") };
}
macro_rules! demo7 {
( $a:tt $b:tt $c:tt $d:tt $e:tt $f:tt $g:tt ) => { println!("seven tokens") };
}
macro_rules! demon {
( $($n:tt)* ) => { println!("unknown number of tokens") };
}
fn main() {
demo1!("");
demo2!(# "");
demo3!(# ""#);
demo2!(# "foo");
demo3!(# "foo"#);
demo2!("foo"#);
demo2!(blah"xx"); //~ ERROR prefix `blah` is unknown
demo2!(blah#"xx"#);
//~^ ERROR prefix `blah` is unknown
//~| ERROR invalid string literal
demo2!(## "foo"); //~ reserved multi-hash token is forbidden
demo3!("foo"###); //~ reserved multi-hash token is forbidden
demo3!(### "foo"); //~ reserved multi-hash token is forbidden
demo3!(## "foo"#); //~ reserved multi-hash token is forbidden
demo5!(### "foo"###);
//~^ reserved multi-hash token is forbidden
//~| reserved multi-hash token is forbidden
demo1!(#""); //~ ERROR invalid string literal
demo1!(#""#); //~ ERROR invalid string literal
demo1!(####""); //~ ERROR invalid string literal
demo1!(#"foo"); //~ ERROR invalid string literal
demo1!(###"foo"); //~ ERROR invalid string literal
demo1!(#"foo"#); //~ ERROR invalid string literal
demo1!(###"foo"#); //~ ERROR invalid string literal
demo1!(###"foo"##); //~ ERROR invalid string literal
demo1!(###"foo"###); //~ ERROR invalid string literal
demo2!(#"foo"###);
//~^ ERROR invalid string literal
//~| ERROR reserved multi-hash token is forbidden
// More than 255 hashes
demon!(####################################################################################################################################################################################################################################################################"foo");
//~^ ERROR invalid string literal
}
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