35 lines
698 B
Rust
35 lines
698 B
Rust
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// check-pass
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// aux-build:issue-79242.rs
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// Regression test for issue #79242
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// Tests that compilation time doesn't blow up for a proc-macro
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// invocation with deeply nested nonterminals
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#![allow(unused)]
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extern crate issue_79242;
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macro_rules! declare_nats {
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($prev:ty) => {};
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($prev:ty, $n:literal$(, $tail:literal)*) => {
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issue_79242::dummy! {
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$prev
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}
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declare_nats!(Option<$prev>$(, $tail)*);
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};
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(0, $($n:literal),+) => {
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pub struct N0;
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declare_nats!(N0, $($n),+);
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};
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}
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declare_nats! {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
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17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28
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}
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fn main() {}
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