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;; -*-theme-d-*-
;; Copyright (C) 2016, 2021 Tommi Höynälänmaa
;; Distributed under GNU Lesser General Public License version 3,
;; see file doc/LGPL-3.
(define-interface (standard-library stream)
(import (standard-library core)
(standard-library promise)
(standard-library text-file-io))
(define-param-logical-type :stream (%type)
(:union (:pair (:promise %type) (:promise (:stream %type))) <null>))
(define-param-logical-type :nonempty-stream (%type)
(:pair (:promise %type) (:promise (:stream %type))))
(define-param-logical-type :nonpure-stream (%type)
(:union (:pair (:nonpure-promise %type)
(:nonpure-promise (:nonpure-stream %type))) <null>))
(define-param-logical-type :nonempty-nonpure-stream (%type)
(:pair (:nonpure-promise %type)
(:nonpure-promise (:nonpure-stream %type))))
(declare-param-method stream-next (%type) ((:stream %type))
(:stream %type)
pure)
(declare-param-method stream-value (%type) ((:stream %type))
%type
pure)
(declare-param-method stream-empty? (%type) ((:stream %type))
<boolean>
pure)
(declare-param-method stream->list (%type) ((:stream %type))
(:uniform-list %type)
pure)
(declare-param-method list->stream (%type) ((:uniform-list %type))
(:stream %type)
pure)
(declare-param-method nonpure-stream-next (%type) ((:nonpure-stream %type))
(:nonpure-stream %type)
nonpure)
(declare-param-method nonpure-stream-value (%type) ((:nonpure-stream %type))
%type
nonpure)
(declare-param-method nonpure-stream-empty? (%type) ((:nonpure-stream %type))
<boolean>
pure)
(declare-param-method nonpure-stream->list (%type) ((:nonpure-stream %type))
(:uniform-list %type)
nonpure)
(declare-param-method stream-map (%type1 %type2)
((:procedure (%type1) %type2 pure)
(:stream %type1))
(:stream %type2)
pure)
(declare-param-method stream-map-nonpure (%type1 %type2)
((:procedure (%type1) %type2 nonpure)
(:stream %type1))
(:nonpure-stream %type2)
nonpure)
(declare-param-method stream-for-each (%type1)
((:procedure (%type1) <none> nonpure)
(:stream %type1))
<none>
nonpure)
(declare-param-method nonpure-stream-map (%type1 %type2)
((:procedure (%type1) %type2 nonpure)
(:nonpure-stream %type1))
(:nonpure-stream %type2)
nonpure)
(declare-param-method nonpure-stream-for-each
(%type1)
((:procedure (%type1) <none> nonpure)
(:nonpure-stream %type1))
<none>
nonpure)
(declare-simple-method make-input-expr-stream (<input-port>)
(:nonpure-stream <object>)
nonpure))
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