Merge pull request #17 from tiendc/fix/allow-return-final-decode-error

Return final decode error when finish

Author: tiendc

decoder.go

@@ -256,9 +256,9 @@ func (d *Decoder) DecodeOne(v interface{}) error {
 	return err
 }
 
-func (d *Decoder) Finish() *DecodeResult {
+func (d *Decoder) Finish() (*DecodeResult, error) {
 	d.finished = true
-	return d.result
+	return d.result, d.err
 }
 
 func (d *Decoder) prepareDecode(v reflect.Value) error {

decoder_test.go

@@ -1165,7 +1165,7 @@ func Test_DecodeOne(t *testing.T) {
 		err := d.DecodeOne(&v1)
 		assert.Nil(t, err)
 		assert.Equal(t, Item{Col1: 1, Col2: 2.123}, v1)
-		_ = d.Finish()
+		_, _ = d.Finish()
 		err = d.DecodeOne(&v2)
 		assert.ErrorIs(t, err, ErrFinished)
 	})

docs/DECODING.md

@@ -379,8 +379,9 @@ tom,26,new york`)
     for decoder.DecodeOne(&student) != csvlib.ErrFinished {
         fmt.Printf("%+v\n", student)
     }
-    
-    fmt.Printf("%+v\n", *decoder.Finish())
+
+    result, err := decoder.Finish() // err is *csvlib.Errors if it's not nil
+    fmt.Printf("%+v\n", *result)
 
     // Output:
     // {Name:jerry Age:20 Address:}