mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-27 13:58:05 +00:00
49 lines
1.5 KiB
Go
49 lines
1.5 KiB
Go
package stack
|
|
|
|
import (
|
|
"errors"
|
|
)
|
|
|
|
//Item is an interface which represents object that can be placed on the stack
|
|
type Item interface {
|
|
Integer() (*Int, error)
|
|
Boolean() (*Boolean, error)
|
|
ByteArray() (*ByteArray, error)
|
|
Array() (*Array, error)
|
|
Context() (*Context, error)
|
|
}
|
|
|
|
// Represents an `abstract` stack item
|
|
// which will hold default values for stack items
|
|
// this is intended to be embedded into types that you will use on the stack
|
|
type abstractItem struct{}
|
|
|
|
// Integer is the default implementation for a stackItem
|
|
// Implements Item interface
|
|
func (a *abstractItem) Integer() (*Int, error) {
|
|
return nil, errors.New("This stack item is not an Integer")
|
|
}
|
|
|
|
// Boolean is the default implementation for a stackItem
|
|
// Implements Item interface
|
|
func (a *abstractItem) Boolean() (*Boolean, error) {
|
|
return nil, errors.New("This stack item is not a Boolean")
|
|
}
|
|
|
|
// ByteArray is the default implementation for a stackItem
|
|
// Implements Item interface
|
|
func (a *abstractItem) ByteArray() (*ByteArray, error) {
|
|
return nil, errors.New("This stack item is not a byte array")
|
|
}
|
|
|
|
// Array is the default implementation for a stackItem
|
|
// Implements Item interface
|
|
func (a *abstractItem) Array() (*Array, error) {
|
|
return nil, errors.New("This stack item is not an array")
|
|
}
|
|
|
|
// Context is the default implementation for a stackItem
|
|
// Implements Item interface
|
|
func (a *abstractItem) Context() (*Context, error) {
|
|
return nil, errors.New("This stack item is not of type context")
|
|
}
|