edition-macro-pats.rs

//@ run-pass
//@ edition:2021

macro_rules! foo {
    (a $x:pat_param) => {};
    (b $x:pat) => {};
}

fn main() {
    foo!(a None);
    foo!(b 1 | 2);
}

// ferrocene-annotations: fls_xa7lp0zg1ol2
// Declarative Macros
//
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// Macro Expansion
//
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// Macro Invocation
//
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// Macro Matching
//
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// Macro Transcription
//
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// Metavariables
//
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// Repetition
//
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// Rule Matching
//
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// Token Matching