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;; -*-theme-d-*-
;; Copyright (C) 2021, 2025 Tommi Höynälänmaa
;; Distributed under GNU Lesser General Public License version 3,
;; see file doc/LGPL-3.
(define-interface (standard-library mutable-pair)
(import (standard-library core)
(standard-library object-string-conversion))
(define-param-class :mpair
(parameters %type1 %type2)
(inheritance-access hidden)
(attributes equal-by-value)
(fields
(head %type1 public public)
(tail %type2 public public)))
(define-param-logical-type :mutable-alist (%key %value)
(:uniform-list (:mpair %key %value)))
(define-param-logical-type :nonempty-mutable-alist (%key %value)
(:nonempty-uniform-list (:mpair %key %value)))
(declare-param-method mcons (%type1 %type2)
(%type1 %type2) (:mpair %type1 %type2) pure)
(declare-param-method mcar (%type1 %type2) ((:mpair %type1 %type2))
%type1 pure)
(declare-param-method mcdr (%type1 %type2) ((:mpair %type1 %type2))
%type2 pure)
(declare-param-method m-set-car! (%type1 %type2)
((:mpair %type1 %type2) %type1) <none> nonpure)
(declare-param-method m-set-cdr! (%type1 %type2)
((:mpair %type1 %type2) %type2) <none> nonpure)
(declare-param-method m-assoc (%key %value %default)
(%key (:mutable-alist %key %value) %default)
(:union (:mpair %key %value) %default)
pure)
(declare-param-method mpair->string (%type1 %type2)
((:mpair %type1 %type2)) <string> pure)
(declare-param-virtual-method object->string (%type1 %type2)
((:mpair %type1 %type2)) <string> pure))
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