fix: apply :typecast only to potentially basic types

pkg/builder/assignment.go

@@ -351,7 +351,7 @@ func (b *assignmentBuilder) castNode(lhsType types.Type, rhs bmodel.Node) (c bmo
 		return b.castNode(lhsType, bmodel.NewStringer(rhs))
 	}
 
-	if b.opts.Typecast && types.ConvertibleTo(rhs.ExprType(), lhsType) {
+	if b.opts.Typecast && types.ConvertibleTo(rhs.ExprType(), lhsType) && util.IsBasicType(lhsType.Underlying()) {
 		c, ok = bmodel.NewTypecast(b.pkg.Types.Scope(), b.imports, lhsType, rhs)
 		if !ok {
 			logger.Warnf("%v: typecast for %v is not implemented(yet) for %v",

tests/fixtures/usecase/typecast/domain/user.go

@@ -8,4 +8,9 @@ type User struct {
 	ID     int
 	Name   string
 	Status enums.Status
+	Origin Origin
+}
+
+type Origin struct {
+	Region string
 }

tests/fixtures/usecase/typecast/model/user.go

@@ -4,4 +4,9 @@ type User struct {
 	ID     int64
 	Name   string
 	Status string
+	Origin Origin
+}
+
+type Origin struct {
+	Region string
 }