test: add new tests for const global vars and generic params

tests/compile/const_var_compose.rs

@@ -0,0 +1,9 @@
+use compose_idents::compose_idents;
+
+compose_idents!(my_var = [foo, _, var]; {
+    const my_var: u32 = 42;
+});
+
+fn main() {
+    assert_eq!(foo_var, 42);
+}

tests/compile/generic_param_compose.rs

@@ -0,0 +1,11 @@
+use compose_idents::compose_idents;
+
+compose_idents!(DATA_LEN = [FOO, _, BAR]; {
+    fn my_fn<T, const DATA_LEN: usize>(_data: &[T; DATA_LEN]) -> usize {
+        DATA_LEN
+    }
+});
+
+fn main() {
+    assert_eq!(my_fn(&[1, 2, 3]), 3);
+}

tests/tests.rs

@@ -4,4 +4,6 @@ fn compile_tests() {
     t.pass("tests/compile/simple_compose.rs");
     t.pass("tests/compile/nested_compose.rs");
     t.pass("tests/compile/multi_compose.rs");
+    t.pass("tests/compile/const_var_compose.rs");
+    t.pass("tests/compile/generic_param_compose.rs");
 }