correct structonly functionality

- structonly wasn’t behaving correctly when not used with an accompanying struct validation.

README.md

@@ -2,7 +2,7 @@ Package validator
 ================
 <img align="right" src="https://raw.githubusercontent.com/go-playground/validator/v9/logo.png">
 [![Join the chat at https://gitter.im/go-playground/validator](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/go-playground/validator?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-![Project status](https://img.shields.io/badge/version-9.3.0-green.svg)
+![Project status](https://img.shields.io/badge/version-9.3.1-green.svg)
 [![Build Status](https://semaphoreci.com/api/v1/joeybloggs/validator/branches/v9/badge.svg)](https://semaphoreci.com/joeybloggs/validator)
 [![Coverage Status](https://coveralls.io/repos/go-playground/validator/badge.svg?branch=v9&service=github)](https://coveralls.io/github/go-playground/validator?branch=v9)
 [![Go Report Card](https://goreportcard.com/badge/github.com/go-playground/validator)](https://goreportcard.com/report/github.com/go-playground/validator)
@@ -66,60 +66,60 @@ Please see http://godoc.org/gopkg.in/go-playground/validator.v9 for detailed usa
 
 Benchmarks
 ------
-###### Run on MacBook Pro (Retina, 15-inch, Late 2013) 2.6 GHz Intel Core i7 16 GB 1600 MHz DDR3 using Go version go1.7.1 darwin/amd64
+###### Run on MacBook Pro (Retina, 15-inch, Late 2013) 2.6 GHz Intel Core i7 16 GB 1600 MHz DDR3 using Go version go1.7.4 darwin/amd64
 ```go
-BenchmarkFieldSuccess-8                                       	20000000	       106 ns/op
-BenchmarkFieldSuccessParallel-8                               	50000000	        33.7 ns/op
-BenchmarkFieldFailure-8                                       	 5000000	       346 ns/op
-BenchmarkFieldFailureParallel-8                               	20000000	       115 ns/op
-BenchmarkFieldDiveSuccess-8                                   	 2000000	       739 ns/op
-BenchmarkFieldDiveSuccessParallel-8                           	10000000	       246 ns/op
-BenchmarkFieldDiveFailure-8                                   	 1000000	      1043 ns/op
-BenchmarkFieldDiveFailureParallel-8                           	 5000000	       381 ns/op
-BenchmarkFieldCustomTypeSuccess-8                             	 5000000	       270 ns/op
-BenchmarkFieldCustomTypeSuccessParallel-8                     	20000000	        92.5 ns/op
-BenchmarkFieldCustomTypeFailure-8                             	 5000000	       331 ns/op
-BenchmarkFieldCustomTypeFailureParallel-8                     	20000000	       132 ns/op
-BenchmarkFieldOrTagSuccess-8                                  	 2000000	       874 ns/op
-BenchmarkFieldOrTagSuccessParallel-8                          	 5000000	       368 ns/op
-BenchmarkFieldOrTagFailure-8                                  	 3000000	       566 ns/op
-BenchmarkFieldOrTagFailureParallel-8                          	 5000000	       427 ns/op
-BenchmarkStructLevelValidationSuccess-8                       	 5000000	       335 ns/op
-BenchmarkStructLevelValidationSuccessParallel-8               	20000000	       124 ns/op
-BenchmarkStructLevelValidationFailure-8                       	 2000000	       630 ns/op
-BenchmarkStructLevelValidationFailureParallel-8               	10000000	       298 ns/op
-BenchmarkStructSimpleCustomTypeSuccess-8                      	 3000000	       535 ns/op
-BenchmarkStructSimpleCustomTypeSuccessParallel-8              	10000000	       170 ns/op
-BenchmarkStructSimpleCustomTypeFailure-8                      	 2000000	       821 ns/op
-BenchmarkStructSimpleCustomTypeFailureParallel-8              	 5000000	       379 ns/op
-BenchmarkStructFilteredSuccess-8                              	 2000000	       769 ns/op
-BenchmarkStructFilteredSuccessParallel-8                      	 5000000	       328 ns/op
-BenchmarkStructFilteredFailure-8                              	 2000000	       594 ns/op
-BenchmarkStructFilteredFailureParallel-8                      	10000000	       244 ns/op
-BenchmarkStructPartialSuccess-8                               	 2000000	       682 ns/op
-BenchmarkStructPartialSuccessParallel-8                       	 5000000	       291 ns/op
-BenchmarkStructPartialFailure-8                               	 1000000	      1034 ns/op
-BenchmarkStructPartialFailureParallel-8                       	 5000000	       392 ns/op
-BenchmarkStructExceptSuccess-8                                	 1000000	      1014 ns/op
-BenchmarkStructExceptSuccessParallel-8                        	10000000	       257 ns/op
-BenchmarkStructExceptFailure-8                                	 2000000	       875 ns/op
-BenchmarkStructExceptFailureParallel-8                        	 5000000	       405 ns/op
-BenchmarkStructSimpleCrossFieldSuccess-8                      	 3000000	       545 ns/op
-BenchmarkStructSimpleCrossFieldSuccessParallel-8              	10000000	       177 ns/op
-BenchmarkStructSimpleCrossFieldFailure-8                      	 2000000	       787 ns/op
-BenchmarkStructSimpleCrossFieldFailureParallel-8              	 5000000	       341 ns/op
-BenchmarkStructSimpleCrossStructCrossFieldSuccess-8           	 2000000	       795 ns/op
-BenchmarkStructSimpleCrossStructCrossFieldSuccessParallel-8   	10000000	       267 ns/op
-BenchmarkStructSimpleCrossStructCrossFieldFailure-8           	 1000000	      1119 ns/op
-BenchmarkStructSimpleCrossStructCrossFieldFailureParallel-8   	 3000000	       437 ns/op
-BenchmarkStructSimpleSuccess-8                                	 5000000	       377 ns/op
-BenchmarkStructSimpleSuccessParallel-8                        	20000000	       110 ns/op
-BenchmarkStructSimpleFailure-8                                	 2000000	       785 ns/op
-BenchmarkStructSimpleFailureParallel-8                        	 5000000	       302 ns/op
-BenchmarkStructComplexSuccess-8                               	 1000000	      2159 ns/op
-BenchmarkStructComplexSuccessParallel-8                       	 2000000	       723 ns/op
-BenchmarkStructComplexFailure-8                               	  300000	      5237 ns/op
-BenchmarkStructComplexFailureParallel-8                       	 1000000	      2378 ns/op
+BenchmarkFieldSuccess-8                                       	20000000	       107 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFieldSuccessParallel-8                               	50000000	        33.6 ns/op	       0 B/op	       0 allocs/op
+BenchmarkFieldFailure-8                                       	 5000000	       333 ns/op	     208 B/op	       4 allocs/op
+BenchmarkFieldFailureParallel-8                               	20000000	       117 ns/op	     208 B/op	       4 allocs/op
+BenchmarkFieldDiveSuccess-8                                   	 2000000	       766 ns/op	     201 B/op	      11 allocs/op
+BenchmarkFieldDiveSuccessParallel-8                           	10000000	       232 ns/op	     201 B/op	      11 allocs/op
+BenchmarkFieldDiveFailure-8                                   	 2000000	      1000 ns/op	     412 B/op	      16 allocs/op
+BenchmarkFieldDiveFailureParallel-8                           	 5000000	       337 ns/op	     413 B/op	      16 allocs/op
+BenchmarkFieldCustomTypeSuccess-8                             	 5000000	       264 ns/op	      32 B/op	       2 allocs/op
+BenchmarkFieldCustomTypeSuccessParallel-8                     	20000000	        83.5 ns/op	      32 B/op	       2 allocs/op
+BenchmarkFieldCustomTypeFailure-8                             	 5000000	       343 ns/op	     208 B/op	       4 allocs/op
+BenchmarkFieldCustomTypeFailureParallel-8                     	20000000	       122 ns/op	     208 B/op	       4 allocs/op
+BenchmarkFieldOrTagSuccess-8                                  	 2000000	       872 ns/op	      16 B/op	       1 allocs/op
+BenchmarkFieldOrTagSuccessParallel-8                          	 3000000	       410 ns/op	      16 B/op	       1 allocs/op
+BenchmarkFieldOrTagFailure-8                                  	 3000000	       569 ns/op	     224 B/op	       5 allocs/op
+BenchmarkFieldOrTagFailureParallel-8                          	 3000000	       407 ns/op	     224 B/op	       5 allocs/op
+BenchmarkStructLevelValidationSuccess-8                       	 5000000	       268 ns/op	      32 B/op	       2 allocs/op
+BenchmarkStructLevelValidationSuccessParallel-8               	20000000	        83.3 ns/op	      32 B/op	       2 allocs/op
+BenchmarkStructLevelValidationFailure-8                       	 3000000	       567 ns/op	     304 B/op	       8 allocs/op
+BenchmarkStructLevelValidationFailureParallel-8               	10000000	       204 ns/op	     304 B/op	       8 allocs/op
+BenchmarkStructSimpleCustomTypeSuccess-8                      	 3000000	       457 ns/op	      32 B/op	       2 allocs/op
+BenchmarkStructSimpleCustomTypeSuccessParallel-8              	10000000	       136 ns/op	      32 B/op	       2 allocs/op
+BenchmarkStructSimpleCustomTypeFailure-8                      	 2000000	       757 ns/op	     424 B/op	       9 allocs/op
+BenchmarkStructSimpleCustomTypeFailureParallel-8              	 5000000	       310 ns/op	     440 B/op	      10 allocs/op
+BenchmarkStructFilteredSuccess-8                              	 2000000	       678 ns/op	     288 B/op	       9 allocs/op
+BenchmarkStructFilteredSuccessParallel-8                      	10000000	       258 ns/op	     288 B/op	       9 allocs/op
+BenchmarkStructFilteredFailure-8                              	 3000000	       521 ns/op	     256 B/op	       7 allocs/op
+BenchmarkStructFilteredFailureParallel-8                      	10000000	       197 ns/op	     256 B/op	       7 allocs/op
+BenchmarkStructPartialSuccess-8                               	 2000000	       602 ns/op	     256 B/op	       6 allocs/op
+BenchmarkStructPartialSuccessParallel-8                       	10000000	       241 ns/op	     256 B/op	       6 allocs/op
+BenchmarkStructPartialFailure-8                               	 2000000	       866 ns/op	     480 B/op	      11 allocs/op
+BenchmarkStructPartialFailureParallel-8                       	 5000000	       347 ns/op	     480 B/op	      11 allocs/op
+BenchmarkStructExceptSuccess-8                                	 2000000	       955 ns/op	     496 B/op	      12 allocs/op
+BenchmarkStructExceptSuccessParallel-8                        	10000000	       209 ns/op	     240 B/op	       5 allocs/op
+BenchmarkStructExceptFailure-8                                	 2000000	       809 ns/op	     464 B/op	      10 allocs/op
+BenchmarkStructExceptFailureParallel-8                        	 5000000	       335 ns/op	     464 B/op	      10 allocs/op
+BenchmarkStructSimpleCrossFieldSuccess-8                      	 3000000	       469 ns/op	      72 B/op	       3 allocs/op
+BenchmarkStructSimpleCrossFieldSuccessParallel-8              	10000000	       167 ns/op	      72 B/op	       3 allocs/op
+BenchmarkStructSimpleCrossFieldFailure-8                      	 2000000	       714 ns/op	     304 B/op	       8 allocs/op
+BenchmarkStructSimpleCrossFieldFailureParallel-8              	 5000000	       278 ns/op	     304 B/op	       8 allocs/op
+BenchmarkStructSimpleCrossStructCrossFieldSuccess-8           	 2000000	       660 ns/op	      80 B/op	       4 allocs/op
+BenchmarkStructSimpleCrossStructCrossFieldSuccessParallel-8   	10000000	       244 ns/op	      80 B/op	       4 allocs/op
+BenchmarkStructSimpleCrossStructCrossFieldFailure-8           	 2000000	       939 ns/op	     320 B/op	       9 allocs/op
+BenchmarkStructSimpleCrossStructCrossFieldFailureParallel-8   	 5000000	       382 ns/op	     320 B/op	       9 allocs/op
+BenchmarkStructSimpleSuccess-8                                	 5000000	       287 ns/op	       0 B/op	       0 allocs/op
+BenchmarkStructSimpleSuccessParallel-8                        	20000000	        90.5 ns/op	       0 B/op	       0 allocs/op
+BenchmarkStructSimpleFailure-8                                	 2000000	       712 ns/op	     424 B/op	       9 allocs/op
+BenchmarkStructSimpleFailureParallel-8                        	 5000000	       298 ns/op	     424 B/op	       9 allocs/op
+BenchmarkStructComplexSuccess-8                               	 1000000	      1645 ns/op	     128 B/op	       8 allocs/op
+BenchmarkStructComplexSuccessParallel-8                       	 3000000	       544 ns/op	     128 B/op	       8 allocs/op
+BenchmarkStructComplexFailure-8                               	  300000	      4688 ns/op	    3041 B/op	      53 allocs/op
+BenchmarkStructComplexFailureParallel-8                       	 1000000	      2064 ns/op	    3041 B/op	      53 allocs/op
 ```
 
 Complimentary Software

validator.go

@@ -169,6 +169,11 @@ func (v *validate) traverseField(parent reflect.Value, current reflect.Value, ns
 		if typ != timeType {
 
 			if ct != nil {
+
+				if ct.typeof == typeStructOnly {
+					goto CONTINUE
+				}
+
 				ct = ct.next
 			}
 
@@ -176,6 +181,7 @@ func (v *validate) traverseField(parent reflect.Value, current reflect.Value, ns
 				return
 			}
 
+		CONTINUE:
 			// if len == 0 then validating using 'Var' or 'VarWithValue'
 			// Var - doesn't make much sense to do it that way, should call 'Struct', but no harm...
 			// VarWithField - this allows for validating against each field withing the struct against a specific value

validator_test.go

@@ -4391,6 +4391,49 @@ func TestStructOnlyValidation(t *testing.T) {
 
 	errs = validate.Struct(outer)
 	Equal(t, errs, nil)
+
+	// Address houses a users address information
+	type Address struct {
+		Street string `validate:"required"`
+		City   string `validate:"required"`
+		Planet string `validate:"required"`
+		Phone  string `validate:"required"`
+	}
+
+	type User struct {
+		FirstName      string     `json:"fname"`
+		LastName       string     `json:"lname"`
+		Age            uint8      `validate:"gte=0,lte=130"`
+		Email          string     `validate:"required,email"`
+		FavouriteColor string     `validate:"hexcolor|rgb|rgba"`
+		Addresses      []*Address `validate:"required"`   // a person can have a home and cottage...
+		Address        Address    `validate:"structonly"` // a person can have a home and cottage...
+	}
+
+	address := &Address{
+		Street: "Eavesdown Docks",
+		Planet: "Persphone",
+		Phone:  "none",
+		City:   "Unknown",
+	}
+
+	user := &User{
+		FirstName:      "",
+		LastName:       "",
+		Age:            45,
+		Email:          "Badger.Smith@gmail.com",
+		FavouriteColor: "#000",
+		Addresses:      []*Address{address},
+		Address: Address{
+			// Street: "Eavesdown Docks",
+			Planet: "Persphone",
+			Phone:  "none",
+			City:   "Unknown",
+		},
+	}
+
+	errs = validate.Struct(user)
+	Equal(t, errs, nil)
 }
 
 func TestGtField(t *testing.T) {