mirror of https://github.com/rust-lang/rust
81 lines
1.6 KiB
Rust
81 lines
1.6 KiB
Rust
// Regression test for #57597.
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//
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// Make sure that nested matchers work correctly rather than causing an infinite loop or crash.
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//@ edition:2018
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macro_rules! foo1 {
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($($($i:ident)?)+) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo2 {
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($($($i:ident)?)*) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo3 {
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($($($i:ident)?)?) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo4 {
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($($($($i:ident)?)?)?) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo5 {
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($($($($i:ident)*)?)?) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo6 {
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($($($($i:ident)?)*)?) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo7 {
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($($($($i:ident)?)?)*) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo8 {
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($($($($i:ident)*)*)?) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo9 {
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($($($($i:ident)?)*)*) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo10 {
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($($($($i:ident)?)*)+) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo11 {
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($($($($i:ident)+)?)*) => {};
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//~^ ERROR repetition matches empty token tree
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}
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macro_rules! foo12 {
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($($($($i:ident)+)*)?) => {};
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//~^ ERROR repetition matches empty token tree
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}
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fn main() {
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foo1!();
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foo2!();
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foo3!();
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foo4!();
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foo5!();
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foo6!();
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foo7!();
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foo8!();
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foo9!();
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foo10!();
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foo11!();
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foo12!();
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}
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