refactor: unify the error handling methods in the crypto package that…

… are different from the project style

Signed-off-by: ChengenH <[email protected]>

frontend/schema/internal/reflectwalk/reflectwalk.go

@@ -110,7 +110,7 @@ func walk(v reflect.Value, w interface{}) (err error) {
 		if pointerV.Kind() == reflect.Interface {
 			if iw, ok := w.(InterfaceWalker); ok {
 				if err = iw.Interface(pointerV); err != nil {
-					if err == ErrSkipEntry {
+					if errors.Is(err, ErrSkipEntry) {
 						// Skip the rest of this entry but clear the error
 						return nil
 					}
@@ -124,7 +124,7 @@ func walk(v reflect.Value, w interface{}) (err error) {
 		if pointerV.Kind() == reflect.Ptr {
 			if pw, ok := w.(PointerValueWalker); ok {
 				if err = pw.Pointer(pointerV); err != nil {
-					if err == ErrSkipEntry {
+					if errors.Is(err, ErrSkipEntry) {
 						// Skip the rest of this entry but clear the error
 						return nil
 					}
@@ -271,7 +271,7 @@ func walkStruct(v reflect.Value, w interface{}) (err error) {
 	skip := false
 	if sw, ok := w.(StructWalker); ok {
 		err = sw.Struct(v)
-		if err == ErrSkipEntry {
+		if errors.Is(err, ErrSkipEntry) {
 			skip = true
 			err = nil
 		}
@@ -297,7 +297,7 @@ func walkStruct(v reflect.Value, w interface{}) (err error) {
 				err = sw.StructField(sf, f)
 
 				// SkipEntry just pretends this field doesn't even exist
-				if err == ErrSkipEntry {
+				if errors.Is(err, ErrSkipEntry) {
 					continue
 				}
 

frontend/schema/walk.go

@@ -1,6 +1,7 @@
 package schema
 
 import (
+	"errors"
 	"fmt"
 	"reflect"
 	"strconv"
@@ -20,7 +21,7 @@ func Walk(circuit interface{}, tLeaf reflect.Type, handler LeafHandler) (count L
 		handler:     handler,
 	}
 	err = reflectwalk.Walk(circuit, &w)
-	if err == reflectwalk.ErrSkipEntry {
+	if errors.Is(err, reflectwalk.ErrSkipEntry) {
 		err = nil
 	}
 	count.Public = w.nbPublic