/
stitch.go
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/
stitch.go
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//go:generate stringer -type=Stitch
package buttery
import (
"fmt"
)
// Stitch models a loop continuity strategy.
type Stitch int
const (
// None ends the incoming sequence as-is.
None Stitch = iota
// Mirror follows the end of the incoming sequence by replaying the sequence backwards.
Mirror
// FlipH follows the end of the incoming sequence by replaying the sequence reflected horizontally.
FlipH
// FlipV follows the end of the incoming sequence by replaying the sequence reflected vertically.
FlipV
// Shuffle randomizes the incoming sequence.
Shuffle
)
// ParseStitch generates a Stitch from a string value.
func ParseStitch(s string) (*Stitch, bool) {
for i := None; i <= Shuffle; i++ {
if s == i.String() {
return &i, true
}
}
return nil, false
}
// Validate rejects out of bound values.
func (o Stitch) Validate() error {
if o < None || o > Shuffle {
return fmt.Errorf("invalid stitch value: %d", o)
}
return nil
}