chore: provide missing defaults via

bindings/swift/TreeSitterHcl/hcl.h

@@ -7,7 +7,7 @@ typedef struct TSLanguage TSLanguage;
 extern "C" {
 #endif
 
-extern TSLanguage *tree_sitter_hcl();
+const TSLanguage *tree_sitter_hcl(void);
 
 #ifdef __cplusplus
 }

bindings/swift/TreeSitterHclTests/TreeSitterHclTests.swift

@@ -0,0 +1,12 @@
+import XCTest
+import SwiftTreeSitter
+import TreeSitterHcl
+
+final class TreeSitterHclTests: XCTestCase {
+    func testCanLoadGrammar() throws {
+        let parser = Parser()
+        let language = Language(language: tree_sitter_hcl())
+        XCTAssertNoThrow(try parser.setLanguage(language),
+                         "Error loading Hcl grammar")
+    }
+}