object

integer

Integer data type predicates.

Availability:

logtalk_load(types(loader))

Author: Paulo Moura

Version: 1:55:0

Date: 2022-06-21

Compilation flags:

static, context_switching_calls

Extends:

public number

Remarks:

• Portability notes: This object will use the backend Prolog system between/3, plus/3, and succ/2 built-in predicates when available.

Inherited public predicates:

 (<)/2  (=:=)/2  (=<)/2  (=\=)/2  =~= / 2  (>)/2  (>=)/2  approximately_equal/2  approximately_equal/3  check/1  depth/2  essentially_equal/3  ground/1  new/1  numbervars/1  numbervars/3  occurs/2  singletons/2  subsumes/2  subterm/2  tolerance_equal/4  valid/1  variables/2  variant/2  varnumbers/2  varnumbers/3

Public predicates

between/3

Returns integers in the interval defined by the two first arguments.

Compilation flags:

static

Template:

between(Lower,Upper,Integer)

Mode and number of proofs:

between(+integer,+integer,+integer) - zero_or_one

between(+integer,+integer,-integer) - zero_or_more

---

plus/3

Reversible integer sum. At least two of the arguments must be instantiated to integers.

Compilation flags:

static

Template:

plus(I,J,Sum)

Mode and number of proofs:

plus(+integer,+integer,?integer) - zero_or_one

plus(+integer,?integer,+integer) - zero_or_one

plus(?integer,+integer,+integer) - zero_or_one

---

succ/2

Successor of a natural number. At least one of the arguments must be instantiated to a natural number.

Compilation flags:

static

Template:

succ(I,J)

Mode and number of proofs:

succ(+integer,?integer) - zero_or_one

succ(?integer,+integer) - zero_or_one

---

sequence/3

Generates a list with the sequence of all integers in the interval [Lower,Upper]. Assumes Lower =< Upper and fails otherwise.

Compilation flags:

static

Template:

sequence(Lower,Upper,List)

Mode and number of proofs:

sequence(+integer,+integer,-list(integer)) - zero_or_one

---

sequence/4

Generates a list with the sequence of integers in the interval [Lower,Upper] by Step. Assumes Lower =< Upper, Step >= 1 and fails otherwise.

Compilation flags:

static

Template:

sequence(Lower,Upper,Step,List)

Mode and number of proofs:

sequence(+integer,+integer,+integer,-list(integer)) - zero_or_one

---

Protected predicates

(no local declarations; see entity ancestors if any)

Private predicates

(no local declarations; see entity ancestors if any)

Operators

(none)