58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
|
package objects
|
||
|
|
|
||
|
|
import "github.com/d5/tengo/compiler/token"
|
||
|
|
|
||
|
|
// StringIterator represents an iterator for a string.
|
||
|
|
type StringIterator struct {
|
||
|
|
v []rune
|
||
|
|
i int
|
||
|
|
l int
|
||
|
|
}
|
||
|
|
|
||
|
|
// TypeName returns the name of the type.
|
||
|
|
func (i *StringIterator) TypeName() string {
|
||
|
|
return "string-iterator"
|
||
|
|
}
|
||
|
|
|
||
|
|
func (i *StringIterator) String() string {
|
||
|
|
return "<string-iterator>"
|
||
|
|
}
|
||
|
|
|
||
|
|
// BinaryOp returns another object that is the result of
|
||
|
|
// a given binary operator and a right-hand side object.
|
||
|
|
func (i *StringIterator) BinaryOp(op token.Token, rhs Object) (Object, error) {
|
||
|
|
return nil, ErrInvalidOperator
|
||
|
|
}
|
||
|
|
|
||
|
|
// IsFalsy returns true if the value of the type is falsy.
|
||
|
|
func (i *StringIterator) IsFalsy() bool {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
// Equals returns true if the value of the type
|
||
|
|
// is equal to the value of another object.
|
||
|
|
func (i *StringIterator) Equals(Object) bool {
|
||
|
|
return false
|
||
|
|
}
|
||
|
|
|
||
|
|
// Copy returns a copy of the type.
|
||
|
|
func (i *StringIterator) Copy() Object {
|
||
|
|
return &StringIterator{v: i.v, i: i.i, l: i.l}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Next returns true if there are more elements to iterate.
|
||
|
|
func (i *StringIterator) Next() bool {
|
||
|
|
i.i++
|
||
|
|
return i.i <= i.l
|
||
|
|
}
|
||
|
|
|
||
|
|
// Key returns the key or index value of the current element.
|
||
|
|
func (i *StringIterator) Key() Object {
|
||
|
|
return &Int{Value: int64(i.i - 1)}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Value returns the value of the current element.
|
||
|
|
func (i *StringIterator) Value() Object {
|
||
|
|
return &Char{Value: i.v[i.i-1]}
|
||
|
|
}
|