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package gojq
// Iter is an interface for an iterator.
type Iter interface {
Next() (any, bool)
}
// NewIter creates a new [Iter] from values.
func NewIter(values ...any) Iter {
switch len(values) {
case 0:
return emptyIter{}
case 1:
return &unitIter{value: values[0]}
default:
iter := sliceIter(values)
return &iter
}
}
type emptyIter struct{}
func (emptyIter) Next() (any, bool) {
return nil, false
}
type unitIter struct {
value any
done bool
}
func (iter *unitIter) Next() (any, bool) {
if iter.done {
return nil, false
}
iter.done = true
return iter.value, true
}
type sliceIter []any
func (iter *sliceIter) Next() (any, bool) {
if len(*iter) == 0 {
return nil, false
}
value := (*iter)[0]
*iter = (*iter)[1:]
return value, true
}
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