slice-error ( from to seq -- * )

Vocabulary

sequences

Inputs

None

Outputs

None

Word description

Throws a slice-error.

Error description

Thrown by <slice> if one of the following invalid conditions holds:

•	The start index is negative
•	The end index is greater than the length of the sequence
•	The start index is greater than the end index

Definition

IN: sequences

ERROR: slice-error from to seq ;

Methods

USING: accessors combinators kernel math sequences summary ;

M: slice-error summary
    "Cannot create slice" swap {
        { [ dup from>> 0 < ] [ ": from < 0" ] }
        {
            [ dup [ to>> ] [ seq>> length ] bi > ]
            [ ": to > length" ]
        }
        { [ dup [ from>> ] [ to>> ] bi > ] [ ": from > to" ] }
        [ f ]
    } cond nip append ;