diff --git a/.github/workflows/generate_visit.yml b/.github/workflows/generate_visit.yml
new file mode 100644
index 0000000..acaf3a1
--- /dev/null
+++ b/.github/workflows/generate_visit.yml
@@ -0,0 +1,36 @@
+name: Generate visit.go
+
+on:
+  push:
+    paths:
+      - 'ast/**'
+      - '!ast/visit.go'
+  workflow_dispatch:
+
+jobs:
+  generate-visit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.21' 
+
+    - name: Generate visit.go
+      run: go run ast/gen_visit.go
+
+    - name: Check for changes
+      id: git-check
+      run: |
+        git diff --exit-code ast/visit.go || echo "changes=true" >> $GITHUB_OUTPUT
+
+    - name: Commit changes
+      if: steps.git-check.outputs.changes == 'true'
+      run: |
+        git config --local user.email "action@github.com"
+        git config --local user.name "GitHub Action"
+        git add ast/visit.go
+        git commit -m "Auto-generate visit.go"
+        git push
diff --git a/ast/ident.go b/ast/ident.go
index 22ad42d..c09b461 100644
--- a/ast/ident.go
+++ b/ast/ident.go
@@ -18,5 +18,5 @@ type (
 func (n *Identifier) ToId() Id {
 	return Id{Name: n.Name, ScopeContext: n.ScopeContext}
 }
-
-func (*Identifier) _expr() {}
+func (i *Id) String() string { return i.Name }
+func (*Identifier) _expr()   {}
diff --git a/generator/generator.go b/generator/generator.go
index 37984b9..8883cc4 100644
--- a/generator/generator.go
+++ b/generator/generator.go
@@ -518,7 +518,7 @@ func (g *GenVisitor) VisitTryStatement(n *ast.TryStatement) {
 
 	if n.Catch != nil {
 		g.out.WriteString(" catch ")
-		if n.Catch.Parameter != nil {
+		if n.Catch.Parameter != nil && n.Catch.Parameter.Target != nil {
 			g.out.WriteString("(")
 			g.gen(n.Catch.Parameter)
 			g.out.WriteString(") ")
diff --git a/parser/statement.go b/parser/statement.go
index f10fd83..9e3562e 100644
--- a/parser/statement.go
+++ b/parser/statement.go
@@ -128,15 +128,15 @@ func (p *parser) parseTryStatement() ast.Stmt {
 	if p.token == token.Catch {
 		catch := p.idx
 		p.next()
-		var parameter ast.Target
+		var parameter *ast.BindingTarget
 		if p.token == token.LeftParenthesis {
 			p.next()
-			parameter = p.parseBindingTarget()
+			parameter = &ast.BindingTarget{Target: p.parseBindingTarget()}
 			p.expect(token.RightParenthesis)
 		}
 		node.Catch = &ast.CatchStatement{
 			Catch:     catch,
-			Parameter: &ast.BindingTarget{Target: parameter},
+			Parameter: parameter,
 			Body:      p.parseBlockStatement(),
 		}
 	}