melrōse musical expression player

package op import ( "fmt" "github.com/emicklei/melrose/core" ) type AtIndex struct { Target core.Sequenceable Index core.HasValue } func (a AtIndex) S() core.Sequence { s := a.Target.S() i := core.Int(a.Index) if i < 1 { return core.EmptySequence } if i > len(s.Notes) { return core.EmptySequence } return core.BuildSequence(s.At(i - 1)) } func (a AtIndex) Storex() string { return fmt.Sprintf("at(%v,%s)", core.Storex(a.Index), core.Storex(a.Target)) } func NewAtIndex(index core.HasValue, target core.Sequenceable) AtIndex { return AtIndex{Target: target, Index: index} }