nitpicking

Signed-off-by: Pierre Fenoll <pierrefenoll@gmail.com>

maps.sh

@@ -110,8 +110,8 @@ func (${name} ${type}) JSONLookup(token string) (interface{}, error) {
 	}
 
 	if v != nil {
-		if v.Ref != "" {
-			return &Ref{Ref: v.Ref}, nil
+		if ref := v.Ref; ref != "" {
+			return &Ref{Ref: ref}, nil
 		}
 		return v, nil
 	}

openapi3/components.go

@@ -139,10 +139,10 @@ func (components *Components) Validate(ctx context.Context, opts ...ValidationOp
 	}
 	sort.Strings(responses)
 	for _, k := range responses {
-		v := components.Responses.Value(k)
 		if err = ValidateIdentifier(k); err != nil {
 			return fmt.Errorf("response %q: %w", k, err)
 		}
+		v := components.Responses.Value(k)
 		if err = v.Validate(ctx); err != nil {
 			return fmt.Errorf("response %q: %w", k, err)
 		}

openapi3/maplike.go

@@ -62,8 +62,8 @@ func (responses *Responses) JSONLookup(token string) (interface{}, error) {
 	}
 
 	if v != nil {
-		if v.Ref != "" {
-			return &Ref{Ref: v.Ref}, nil
+		if ref := v.Ref; ref != "" {
+			return &Ref{Ref: ref}, nil
 		}
 		return v, nil
 	}
@@ -176,8 +176,8 @@ func (callback *Callback) JSONLookup(token string) (interface{}, error) {
 	}
 
 	if v != nil {
-		if v.Ref != "" {
-			return &Ref{Ref: v.Ref}, nil
+		if ref := v.Ref; ref != "" {
+			return &Ref{Ref: ref}, nil
 		}
 		return v, nil
 	}
@@ -290,8 +290,8 @@ func (paths *Paths) JSONLookup(token string) (interface{}, error) {
 	}
 
 	if v != nil {
-		if v.Ref != "" {
-			return &Ref{Ref: v.Ref}, nil
+		if ref := v.Ref; ref != "" {
+			return &Ref{Ref: ref}, nil
 		}
 		return v, nil
 	}

openapi3/openapi3.go

@@ -75,6 +75,9 @@ func (doc *T) AddOperation(path string, method string, operation *Operation) {
 	pathItem := doc.Paths.Value(path)
 	if pathItem == nil {
 		pathItem = &PathItem{}
+		if doc.Paths == nil {
+			doc.Paths = NewPaths()
+		}
 		doc.Paths.Set(path, pathItem)
 	}
 	pathItem.SetOperation(method, operation)