You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: form_mapping.go
    path of file: ./repos/podman/vendor/github.com/gin-gonic/gin/binding
    
    the code of the file until where you have to start completion: // Copyright 2014 Manu Martinez-Almeida. All rights reserved.
// Use of this source code is governed by a MIT style
// license that can be found in the LICENSE file.

package binding

import (
	"errors"
	"fmt"
	"reflect"
	"strconv"
	"strings"
	"time"

	"github.com/gin-gonic/g
    
func setByForm(value reflect.Value, field reflect.StructField, form map[string][]string, tagValue string, opt setOptions) (isSet bool, err error) {
	vs, ok := form[tagValue]
	if !ok && !opt.isDefaultExists {
		return false, nil
	}

	switch value.Kind() {
	case reflect.Slice:
		if !ok {
			vs = []string{opt.defaultValue}
		}
		return true, setSlice(vs, value, field)
	case reflect.Array:
		if !ok {
			vs = []string{opt.defaultValue}
		}
		if len(vs) != value.Len() {
			return false, fmt.Errorf("%q is not valid value for %s", vs, value.Type().String())
		}
		return true, setArray(vs, value, field)
	default:
		var val string
		if !ok {
			val = opt.defaultValue
		}

		if len(vs) > 0 {
			val = vs[0]
		}
		return true, setWithProperType(val, value, field)
	}
}