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vendor/gopkg.in/yaml.v2/decode.go

@@ -190,6 +190,7 @@ type decoder struct {
 	aliases map[string]bool
 	mapType reflect.Type
 	terrors []string
+	strict  bool
 }
 
 var (
@@ -199,8 +200,8 @@ var (
 	ifaceType      = defaultMapType.Elem()
 )
 
-func newDecoder() *decoder {
-	d := &decoder{mapType: defaultMapType}
+func newDecoder(strict bool) *decoder {
+	d := &decoder{mapType: defaultMapType, strict: strict}
 	d.aliases = make(map[string]bool)
 	return d
 }
@@ -639,6 +640,8 @@ func (d *decoder) mappingStruct(n *node, out reflect.Value) (good bool) {
 			value := reflect.New(elemType).Elem()
 			d.unmarshal(n.children[i+1], value)
 			inlineMap.SetMapIndex(name, value)
+		} else if d.strict {
+			d.terrors = append(d.terrors, fmt.Sprintf("line %d: field %s not found in struct %s", n.line+1, name.String(), out.Type()))
 		}
 	}
 	return true