63 lines
1.4 KiB
Go
63 lines
1.4 KiB
Go
package form
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import (
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"reflect"
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"strconv"
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)
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// ExtractType gets the actual underlying type of field value.
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// it is exposed for use within you Custom Functions
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func ExtractType(current reflect.Value) (reflect.Value, reflect.Kind) {
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switch current.Kind() {
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case reflect.Ptr:
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if current.IsNil() {
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return current, reflect.Ptr
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}
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return ExtractType(current.Elem())
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case reflect.Interface:
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if current.IsNil() {
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return current, reflect.Interface
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}
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return ExtractType(current.Elem())
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default:
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return current, current.Kind()
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}
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}
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func parseBool(str string) (bool, error) {
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switch str {
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case "1", "t", "T", "true", "TRUE", "True", "on", "yes", "ok":
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return true, nil
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case "", "0", "f", "F", "false", "FALSE", "False", "off", "no":
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return false, nil
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}
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// strconv.NumError mimicing exactly the strconv.ParseBool(..) error and type
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// to ensure compatibility with std library and beyond.
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return false, &strconv.NumError{Func: "ParseBool", Num: str, Err: strconv.ErrSyntax}
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}
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// hasValue determines if a reflect.Value is it's default value
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func hasValue(field reflect.Value) bool {
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switch field.Kind() {
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case reflect.Slice, reflect.Map, reflect.Ptr, reflect.Interface, reflect.Chan, reflect.Func:
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return !field.IsNil()
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default:
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if !field.IsValid() {
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return false
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}
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if !field.Type().Comparable() {
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return true
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}
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return field.Interface() != reflect.Zero(field.Type()).Interface()
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}
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}
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