Split test module for metavariable expressions

crates/hir-def/src/macro_expansion_tests/mbe.rs

@@ -4,6 +4,7 @@
 mod tt_conversion;
 mod matching;
 mod meta_syntax;
+mod metavar_expr;
 mod regression;
 
 use expect_test::expect;
@@ -1614,92 +1615,6 @@ struct Foo;
     )
 }
 
-#[test]
-fn test_dollar_dollar() {
-    check(
-        r#"
-macro_rules! register_struct { ($Struct:ident) => {
-    macro_rules! register_methods { ($$($method:ident),*) => {
-        macro_rules! implement_methods { ($$$$($$val:expr),*) => {
-            struct $Struct;
-            impl $Struct { $$(fn $method() -> &'static [u32] { &[$$$$($$$$val),*] })*}
-        }}
-    }}
-}}
-
-register_struct!(Foo);
-register_methods!(alpha, beta);
-implement_methods!(1, 2, 3);
-"#,
-        expect![[r#"
-macro_rules! register_struct { ($Struct:ident) => {
-    macro_rules! register_methods { ($$($method:ident),*) => {
-        macro_rules! implement_methods { ($$$$($$val:expr),*) => {
-            struct $Struct;
-            impl $Struct { $$(fn $method() -> &'static [u32] { &[$$$$($$$$val),*] })*}
-        }}
-    }}
-}}
-
-macro_rules !register_methods {
-    ($($method: ident), *) = > {
-        macro_rules!implement_methods {
-            ($$($val: expr), *) = > {
-                struct Foo;
-                impl Foo {
-                    $(fn $method()-> &'static[u32] {
-                        &[$$($$val), *]
-                    }
-                    )*
-                }
-            }
-        }
-    }
-}
-macro_rules !implement_methods {
-    ($($val: expr), *) = > {
-        struct Foo;
-        impl Foo {
-            fn alpha()-> &'static[u32] {
-                &[$($val), *]
-            }
-            fn beta()-> &'static[u32] {
-                &[$($val), *]
-            }
-        }
-    }
-}
-struct Foo;
-impl Foo {
-    fn alpha() -> &'static[u32] {
-        &[1, 2, 3]
-    }
-    fn beta() -> &'static[u32] {
-        &[1, 2, 3]
-    }
-}
-"#]],
-    )
-}
-
-#[test]
-fn test_metavar_exprs() {
-    check(
-        r#"
-macro_rules! m {
-    ( $( $t:tt )* ) => ( $( ${ignore(t)} -${index()} )-* );
-}
-const _: i32 = m!(a b c);
-    "#,
-        expect![[r#"
-macro_rules! m {
-    ( $( $t:tt )* ) => ( $( ${ignore(t)} -${index()} )-* );
-}
-const _: i32 = -0--1--2;
-    "#]],
-    );
-}
-
 #[test]
 fn test_punct_without_space() {
     // Puncts are "glued" greedily.

crates/hir-def/src/macro_expansion_tests/mbe/metavar_expr.rs

@@ -0,0 +1,91 @@
+//! Tests for RFC 3086 metavariable expressions.
+
+use expect_test::expect;
+
+use crate::macro_expansion_tests::check;
+
+#[test]
+fn test_dollar_dollar() {
+    check(
+        r#"
+macro_rules! register_struct { ($Struct:ident) => {
+    macro_rules! register_methods { ($$($method:ident),*) => {
+        macro_rules! implement_methods { ($$$$($$val:expr),*) => {
+            struct $Struct;
+            impl $Struct { $$(fn $method() -> &'static [u32] { &[$$$$($$$$val),*] })*}
+        }}
+    }}
+}}
+
+register_struct!(Foo);
+register_methods!(alpha, beta);
+implement_methods!(1, 2, 3);
+"#,
+        expect![[r#"
+macro_rules! register_struct { ($Struct:ident) => {
+    macro_rules! register_methods { ($$($method:ident),*) => {
+        macro_rules! implement_methods { ($$$$($$val:expr),*) => {
+            struct $Struct;
+            impl $Struct { $$(fn $method() -> &'static [u32] { &[$$$$($$$$val),*] })*}
+        }}
+    }}
+}}
+
+macro_rules !register_methods {
+    ($($method: ident), *) = > {
+        macro_rules!implement_methods {
+            ($$($val: expr), *) = > {
+                struct Foo;
+                impl Foo {
+                    $(fn $method()-> &'static[u32] {
+                        &[$$($$val), *]
+                    }
+                    )*
+                }
+            }
+        }
+    }
+}
+macro_rules !implement_methods {
+    ($($val: expr), *) = > {
+        struct Foo;
+        impl Foo {
+            fn alpha()-> &'static[u32] {
+                &[$($val), *]
+            }
+            fn beta()-> &'static[u32] {
+                &[$($val), *]
+            }
+        }
+    }
+}
+struct Foo;
+impl Foo {
+    fn alpha() -> &'static[u32] {
+        &[1, 2, 3]
+    }
+    fn beta() -> &'static[u32] {
+        &[1, 2, 3]
+    }
+}
+"#]],
+    )
+}
+
+#[test]
+fn test_metavar_exprs() {
+    check(
+        r#"
+macro_rules! m {
+    ( $( $t:tt )* ) => ( $( ${ignore(t)} -${index()} )-* );
+}
+const _: i32 = m!(a b c);
+    "#,
+        expect![[r#"
+macro_rules! m {
+    ( $( $t:tt )* ) => ( $( ${ignore(t)} -${index()} )-* );
+}
+const _: i32 = -0--1--2;
+    "#]],
+    );
+}