42 lines
738 B
Go
42 lines
738 B
Go
package set
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import (
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"errors"
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"reflect"
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"strconv"
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)
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var (
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ErrTypeConvert = errors.New("cannot convert input")
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)
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func Field(dst interface{}, fieldName string, value string) error {
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valDst := reflect.ValueOf(dst).Elem()
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dstField := valDst.FieldByName(fieldName)
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val := reflect.ValueOf(value)
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if dstField.Kind() != val.Kind() {
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// try to convert
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switch dstField.Kind() {
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case reflect.Int:
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d, err := strconv.Atoi(value)
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if err != nil {
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return ErrTypeConvert
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}
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val = reflect.ValueOf(d)
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case reflect.Float64:
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f, err := strconv.ParseFloat(value, 64)
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if err != nil {
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return ErrTypeConvert
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}
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val = reflect.ValueOf(f)
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default:
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return ErrTypeConvert
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}
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}
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dstField.Set(val)
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return nil
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}
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