bendns' repos / rust-analyzer
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/hir_def/src/macro_expansion_tests/mbe.rs')
-rw-r--r--crates/hir_def/src/macro_expansion_tests/mbe.rs39
1 files changed, 39 insertions, 0 deletions
diff --git a/crates/hir_def/src/macro_expansion_tests/mbe.rs b/crates/hir_def/src/macro_expansion_tests/mbe.rs
index 06ef8f3572..c7442bade6 100644
--- a/crates/hir_def/src/macro_expansion_tests/mbe.rs
+++ b/crates/hir_def/src/macro_expansion_tests/mbe.rs
@@ -10,6 +10,45 @@ use expect_test::expect;
use crate::macro_expansion_tests::check;
#[test]
+fn mbe_smoke_test() {
+ check(
+ r#"
+macro_rules! impl_froms {
+ ($e:ident: $($v:ident),*) => {
+ $(
+ impl From<$v> for $e {
+ fn from(it: $v) -> $e { $e::$v(it) }
+ }
+ )*
+ }
+}
+impl_froms!(TokenTree: Leaf, Subtree);
+"#,
+ expect![[r#"
+macro_rules! impl_froms {
+ ($e:ident: $($v:ident),*) => {
+ $(
+ impl From<$v> for $e {
+ fn from(it: $v) -> $e { $e::$v(it) }
+ }
+ )*
+ }
+}
+impl From<Leaf> for TokenTree {
+ fn from(it:Leaf) -> TokenTree {
+ TokenTree::Leaf(it)
+ }
+}
+impl From<Subtree> for TokenTree {
+ fn from(it:Subtree) -> TokenTree {
+ TokenTree::Subtree(it)
+ }
+}
+"#]],
+ );
+}
+
+#[test]
fn expansion_does_not_parse_as_expression() {
check(
r#"