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31 lines
488 B
Go
31 lines
488 B
Go
package common
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type WithUpstream interface {
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Upstream() any
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}
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func Cast[T any](obj any) (T, bool) {
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if c, ok := obj.(T); ok {
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return c, true
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}
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if u, ok := obj.(WithUpstream); ok {
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return Cast[T](u.Upstream())
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}
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return DefaultValue[T](), false
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}
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func MustCast[T any](obj any) T {
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value, ok := Cast[T](obj)
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if !ok {
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// make panic
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return obj.(T)
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}
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return value
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}
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func Top(obj any) any {
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if u, ok := obj.(WithUpstream); ok {
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return Top(u.Upstream())
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}
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return obj
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}
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