mirror of https://github.com/rust-lang/rust
37 lines
918 B
Rust
37 lines
918 B
Rust
//@ edition:2021
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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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fn main() {
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demo3!(foo#bar); //~ ERROR prefix `foo` is unknown
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demo2!(foo"bar"); //~ ERROR prefix `foo` is unknown
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demo2!(foo'b'); //~ ERROR prefix `foo` is unknown
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demo2!(foo'b); //~ ERROR prefix `foo` is unknown
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demo3!(foo# bar); //~ ERROR prefix `foo` is unknown
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demo4!(foo#! bar); //~ ERROR prefix `foo` is unknown
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demo4!(foo## bar); //~ ERROR prefix `foo` is unknown
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demo4!(foo#bar#);
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//~^ ERROR prefix `foo` is unknown
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//~| ERROR prefix `bar` is unknown
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demo3!(foo # bar);
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demo3!(foo #bar);
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demo4!(foo!#bar);
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demo4!(foo ##bar);
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demo3!(r"foo"#bar);
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demo3!(r#foo#bar);
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}
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