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Add regression test.

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This commit is contained in:
Jeffrey Seyfried 2016-07-19 20:16:23 +00:00
parent b40b7ef0c4
commit 485e2df1b1
1 changed files with 9 additions and 0 deletions
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9
src/test/run-pass/macro-of-higher-order.rs
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@ -16,7 +16,16 @@ macro_rules! higher_order {
}); });
} }
macro_rules! outer {
($x:expr; $fragment:ident) => {
macro_rules! inner { ($y:$fragment) => { $x + $y } }
}
}
fn main() { fn main() {
let val = higher_order!(subst ($x:expr, $y:expr, $foo:expr) => (($x + $y, $foo))); let val = higher_order!(subst ($x:expr, $y:expr, $foo:expr) => (($x + $y, $foo)));
assert_eq!(val, (3, "foo")); assert_eq!(val, (3, "foo"));
outer!(2; expr);
assert_eq!(inner!(3), 5);
} }