TrueCloudLab/neo-go
8
0
Fork 0
mirror of https://github.com/nspcc-dev/neo-go.git synced 2025-05-04 09:02:28 +00:00
Code Issues Projects Releases Packages Wiki Activity

core,vm: remove System.Enumerator.* interops

Browse source 
Map iterator now returns key-value pair, while array/byte-array
iterators work like old enumerators.
Follow neo-project/neo#2190.
This commit is contained in:
Evgeniy Stratonikov 2021-01-12 12:30:21 +03:00 • committed by Roman Khimov
parent d04b000748
commit 2130e17f0c
16 changed files with 86 additions and 422 deletions
Download patch file Download diff file Expand all files Collapse all files

30
pkg/interop/iterator/iterator.go
View file

@ -3,8 +3,6 @@ Package iterator provides functions to work with Neo iterators.
*/
package iterator
import "github.com/nspcc-dev/neo-go/pkg/interop/enumerator"
// Iterator represents a Neo iterator, it's an opaque data structure that can
// be properly created by Create or storage.Find. Unlike enumerators, iterators
// range over key-value pairs, so it's convenient to use them for maps. This
@ -19,37 +17,17 @@ func Create(items interface{}) Iterator {
return Iterator{}
}
// Key returns iterator's key at current position. It's only valid to call after
// successful Next call. This function uses `System.Iterator.Key` syscall.
func Key(it Iterator) interface{} {
return nil
}
// Keys returns Enumerator ranging over keys or the given Iterator. Note that
// this Enumerator is actually directly tied to the underlying Iterator, so that
// advancing it with Next will actually advance the Iterator too. This function
// uses `System.Iterator.Keys` syscall.
func Keys(it Iterator) enumerator.Enumerator {
return enumerator.Enumerator{}
}
// Next advances the iterator returning true if it is was successful (and you
// can use Key or Value) and false otherwise (and there are no more elements in
// this Iterator). This function uses `System.Enumerator.Next` syscall.
// this Iterator). This function uses `System.Iterator.Next` syscall.
func Next(it Iterator) bool {
return true
}
// Value returns iterator's current value. It's only valid to call after
// successful Next call. This function uses `System.Enumerator.Value` syscall.
// successful Next call. This function uses `System.Iterator.Value` syscall.
// For slices the result is just value.
// For maps the result can be casted to a slice of 2 elements: key and value.
func Value(it Iterator) interface{} {
return nil
}
// Values returns Enumerator ranging over values or the given Iterator. Note that
// this Enumerator is actually directly tied to the underlying Iterator, so that
// advancing it with Next will actually advance the Iterator too. This function
// uses `System.Iterator.Values` syscall.
func Values(it Iterator) enumerator.Enumerator {
return enumerator.Enumerator{}
}