php8: resolve enums in NamespaceResolver

pkg/visitor/nsresolver/namespace_resolver.go

@@ -89,6 +89,22 @@ func (nsr *NamespaceResolver) StmtClass(n *ast.StmtClass) {
 	}
 }
 
+func (nsr *NamespaceResolver) StmtEnum(n *ast.StmtEnum) {
+	if n.Type != nil {
+		nsr.ResolveName(n.Type, "")
+	}
+
+	if n.Implements != nil {
+		for _, interfaceName := range n.Implements {
+			nsr.ResolveName(interfaceName, "")
+		}
+	}
+
+	if n.Name != nil {
+		nsr.AddNamespacedName(n, string(n.Name.(*ast.Identifier).Value))
+	}
+}
+
 func (nsr *NamespaceResolver) StmtInterface(n *ast.StmtInterface) {
 	if n.Extends != nil {
 		for _, interfaceName := range n.Extends {

pkg/visitor/nsresolver/namespace_resolver_test.go

@@ -1,9 +1,10 @@
 package nsresolver_test
 
 import (
+	"testing"
+
 	"github.com/laytan/php-parser/pkg/visitor/nsresolver"
 	"github.com/laytan/php-parser/pkg/visitor/traverser"
-	"testing"
 
 	"gotest.tools/assert"
 
@@ -463,6 +464,36 @@ func TestResolveTraitName(t *testing.T) {
 	assert.DeepEqual(t, expected, nsResolver.ResolvedNames)
 }
 
+func TestResolveEnumName(t *testing.T) {
+	nameAB := &ast.Name{Parts: []ast.Vertex{&ast.NamePart{Value: []byte("A")}, &ast.NamePart{Value: []byte("B")}}}
+	nameBC := &ast.Name{Parts: []ast.Vertex{&ast.NamePart{Value: []byte("B")}, &ast.NamePart{Value: []byte("C")}}}
+
+	enum := &ast.StmtEnum{
+		Name: &ast.Identifier{Value: []byte("A")},
+		Type: nameAB,
+		Implements: []ast.Vertex{
+			nameBC,
+		},
+	}
+
+	stxTree := &ast.StmtStmtList{
+		Stmts: []ast.Vertex{
+			enum,
+		},
+	}
+
+	expected := map[ast.Vertex]string{
+		enum:   "A",
+		nameAB: "A\\B",
+		nameBC: "B\\C",
+	}
+
+	nsResolver := nsresolver.NewNamespaceResolver()
+	traverser.NewTraverser(nsResolver).Traverse(stxTree)
+
+	assert.DeepEqual(t, expected, nsResolver.ResolvedNames)
+}
+
 func TestResolveFunctionName(t *testing.T) {
 	nameAB := &ast.Name{Parts: []ast.Vertex{&ast.NamePart{Value: []byte("A")}, &ast.NamePart{Value: []byte("B")}}}
 	nameBC := &ast.Name{Parts: []ast.Vertex{&ast.NamePart{Value: []byte("B")}, &ast.NamePart{Value: []byte("C")}}}