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