56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
// Copyright (c) 2024-2026 Celestino Amoroso (celestino.amoroso@gmail.com).
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// All rights reserved.
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// iter-factory.go
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package expr
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import (
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"slices"
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"git.portale-stac.it/go-pkg/expr/kern"
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"git.portale-stac.it/go-pkg/expr/scan"
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)
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func NewFormalIterator(value any) (it kern.Iterator) {
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if value == nil {
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it = NewArrayIterator([]any{})
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} else {
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it = NewArrayIterator([]any{value})
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}
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return
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}
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func NewIterator(ctx kern.ExprContext, value any, ops []*scan.Term) (it kern.Iterator, err error) {
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if value == nil {
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return NewArrayIterator([]any{}), nil
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}
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switch v := value.(type) {
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case *kern.ListType:
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it = NewListIterator(v, nil)
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case *kern.LinkedList:
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it = NewLinkedListIterator(v, nil)
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case *kern.DictType:
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it, err = NewDictIterator(v, nil)
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case []any:
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it = NewArrayIterator(v)
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case kern.Iterator:
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// var exprs []*scan.Term
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it, err = NewIterIter(v, ctx, ops)
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default:
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it = NewArrayIterator([]any{value})
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}
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return
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}
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func HasIterStandardOperations(name string) bool {
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return slices.Contains([]string{kern.NextName, kern.ResetName, kern.IndexName, kern.CountName, kern.CurrentName, kern.CleanName}, name)
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}
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// func HasIterOperations(name string, ops ...string) bool {
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// return slices.Contains([]string{
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// kern.NextName, kern.ResetName, kern.IndexName, kern.CountName, kern.CurrentName, kern.CleanName,
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// }, name) ||
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// slices.Contains(ops, name)
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// }
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