38 lines
684 B
Go
38 lines
684 B
Go
package egoscale
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import (
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"fmt"
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"reflect"
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)
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// Copy copies the value from from into to. The type of "from" must be convertible into the type of "to".
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func Copy(to, from interface{}) error {
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tt := reflect.TypeOf(to)
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tv := reflect.ValueOf(to)
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ft := reflect.TypeOf(from)
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fv := reflect.ValueOf(from)
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if tt.Kind() != reflect.Ptr {
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return fmt.Errorf("must copy to a pointer, got %q", tt.Name())
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}
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tt = tt.Elem()
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tv = tv.Elem()
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for {
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if ft.ConvertibleTo(tt) {
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break
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}
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if ft.Kind() == reflect.Ptr {
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ft = ft.Elem()
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fv = fv.Elem()
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} else {
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return fmt.Errorf("cannot convert %q into %q", tt.Name(), ft.Name())
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}
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}
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tv.Set(fv.Convert(tt))
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return nil
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}
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