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// Copyright (C) 2022-2023 Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later
package diskio
// interface /////////////////////////////////////////////////////////
type Sequence[K ~int64 | ~int, V any] interface {
SeqLen() K
// Get the value at 'pos' in the sequence. Positions start at
// 0 and increment naturally. It is invalid to call
// SeqGet(pos) with a pos that is >= SeqLen().
SeqGet(pos K) V
}
// implementation: slice /////////////////////////////////////////////
type SliceSequence[K ~int64 | ~int, V any] []V
var _ Sequence[assertAddr, byte] = SliceSequence[assertAddr, byte](nil)
func (s SliceSequence[K, V]) SeqLen() K {
return K(len(s))
}
func (s SliceSequence[K, V]) SeqGet(i K) V {
return s[int(i)]
}
// implementation: string ////////////////////////////////////////////
type StringSequence[K ~int64 | ~int] string
var _ Sequence[assertAddr, byte] = StringSequence[assertAddr]("")
func (s StringSequence[K]) SeqLen() K {
return K(len(s))
}
func (s StringSequence[K]) SeqGet(i K) byte {
return s[int(i)]
}
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