fix: arrays of user defined types

fixtures/solc-0.8/input/Foo.sol

@@ -12,4 +12,10 @@ contract Foo is Bar {
      * @dev and a function
      */
     function foo(BarTestStruct calldata a, BarTestEnum b) external {}
+
+    function bar(BarTestStruct[] calldata a) external pure returns (BarTestStruct[] memory) {
+        return a;
+    }
+
+    function baz(BarTestEnum[] calldata b) external {}
 }

src/cli.test.ts.md

@@ -319,6 +319,18 @@ Generated by [AVA](https://avajs.dev).
     ␊
     and a function␊
     ␊
+    ### \`bar([struct TestStruct[]](fixtures/solc-0.8/output/Bar#teststruct) a) → [struct TestStruct[]](fixtures/solc-0.8/output/Bar#teststruct)\` (external)␊
+    ␊
+    ␊
+    ␊
+    ␊
+    ␊
+    ### \`baz([enum TestEnum[]](fixtures/solc-0.8/output/Bar#testenum) b)\` (external)␊
+    ␊
+    ␊
+    ␊
+    ␊
+    ␊
     ␊
     ␊
     ␊

src/source.ts

@@ -791,22 +791,55 @@ export class SourceTypedVariable {
   }
 
   get isLinkable(): boolean {
-    return (
-      this.variableDeclaration.typeName?.nodeType === "UserDefinedTypeName"
-    );
+    if (!this.variableDeclaration.typeName) {
+      return false;
+    }
+
+    if (this.variableDeclaration.typeName.nodeType === "UserDefinedTypeName") {
+      return true;
+    }
+
+    if (this.variableDeclaration.typeName.nodeType === "ArrayTypeName") {
+      if (
+        this.variableDeclaration.typeName.baseType.nodeType ===
+        "UserDefinedTypeName"
+      ) {
+        return true;
+      }
+    }
+
+    return false;
   }
 
   get link(): string {
     if (!this.isLinkable) {
       throw new Error("Only UserDefinedTypeName can be linked");
     }
 
-    if (this.variableDeclaration.typeName?.nodeType !== "UserDefinedTypeName") {
-      throw new Error("Only UserDefinedTypeName can be linked");
+    if (!this.variableDeclaration.typeName) {
+      throw new Error("Only linkable types can be linked");
     }
 
-    const referencedNodeId =
-      this.variableDeclaration.typeName.referencedDeclaration;
+    let referencedNodeId: number;
+
+    if (this.variableDeclaration.typeName.nodeType === "ArrayTypeName") {
+      if (
+        this.variableDeclaration.typeName.baseType.nodeType ===
+        "UserDefinedTypeName"
+      ) {
+        referencedNodeId =
+          this.variableDeclaration.typeName.baseType.referencedDeclaration;
+      } else {
+        throw new Error("Only arrays of UserDefinedTypeName can be linked");
+      }
+    } else if (
+      this.variableDeclaration.typeName.nodeType === "UserDefinedTypeName"
+    ) {
+      referencedNodeId =
+        this.variableDeclaration.typeName.referencedDeclaration;
+    } else {
+      throw new Error("Only UserDefinedTypeName can be linked");
+    }
 
     const { node } =
       this.func.contract.source.resolveNodeById(referencedNodeId);