macros: Add test cases for macro repetition separators

Author: CohenArthur

gcc/testsuite/rust/compile/macro9.rs

@@ -0,0 +1,17 @@
+macro_rules! add {
+    ($e:expr, $($es:expr),*) => {
+        $e + add!($($es),*)
+    };
+    ($e:expr) => {
+        $e
+    };
+}
+
+fn main() -> i32 {
+    let a = add!(15 2 9); // { dg-error "Failed to match any rule within macro" }
+    let b = add!(15);
+    let b = add!(15 14); // { dg-error "Failed to match any rule within macro" }
+    let b = add!(15, 14,); // { dg-error "Failed to match any rule within macro" }
+
+    0
+}

gcc/testsuite/rust/execute/torture/macros19.rs

@@ -0,0 +1,14 @@
+macro_rules! add {
+    ($e:expr, $($es:expr),*) => {
+        $e + add!($($es),*)
+    };
+    ($e:expr) => {
+        $e
+    };
+}
+
+fn main() -> i32 {
+    let a = add!(15, 2, 9); // 26
+
+    a - 26
+}

gcc/testsuite/rust/execute/torture/macros20.rs

@@ -0,0 +1,14 @@
+macro_rules! add {
+    ($e:expr big_tok $($es:expr) big_tok *) => {
+        $e + add!($($es) big_tok *)
+    };
+    ($e:expr) => {
+        $e
+    };
+}
+
+fn main() -> i32 {
+    let a = add!(15 big_tok 2 big_tok 9); // 26
+
+    a - 26
+}