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31 lines
593 B
Go
31 lines
593 B
Go
package iter
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import (
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"constraints"
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)
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type span[T constraints.Integer] struct {
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next T
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final T
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step T
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}
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func (s *span[T]) Next(n *T) bool {
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if s.next >= s.final {
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return false
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}
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*n = s.next
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s.next += s.step
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return true
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}
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// Span creates a span of integers between start and end
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func Span[T constraints.Integer](start, end T) Ator[T] {
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return &span[T]{next: start, final: end, step: 1}
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}
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// Step is the same as span, but allows for step sizes greater than 1
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func Step[T constraints.Integer](start, end, step T) Ator[T] {
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return &span[T]{next: start, final: end, step: step}
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}
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