136 lines
2.7 KiB
TypeScript
136 lines
2.7 KiB
TypeScript
/*
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* Verrückte Turing-Maschinen — A turing complete game
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* Copyright (C) 2016 Christian Fraß <vidofnir@folksprak.org>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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module lib_errormonade
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{
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/**
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* @author kcf <vidofnir@folksprak.org>
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*/
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export type type_errormonade<type_value> = lib_call.type_complex<any>;
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/**
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* @author kcf <vidofnir@folksprak.org>
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*/
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export function create_nothing<type_value>
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(
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)
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: type_errormonade<type_value>
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{
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return (
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lib_call.wrap<any>
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(
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"nothing",
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{
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}
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)
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);
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}
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/**
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* @author kcf <vidofnir@folksprak.org>
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*/
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export function create_just<type_value>
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(
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value : type_value
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)
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: type_errormonade<type_value>
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{
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return (
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lib_call.wrap<any>
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(
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"just",
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{
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"value": value
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}
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)
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);
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}
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/**
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* @author kcf <vidofnir@folksprak.org>
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*/
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export function filled<type_value>
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(
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errormonade : type_errormonade<type_value>
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)
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: boolean
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{
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return (
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lib_call.distinguish<any>
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(
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errormonade,
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{
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"nothing": ({}) => false,
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"just": ({"value": value}) => true,
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}
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)
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);
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}
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/**
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* @author kcf <vidofnir@folksprak.org>
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*/
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export function read<type_value>
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(
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errormonade : type_errormonade<type_value>
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)
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: type_value
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{
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return (
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lib_call.distinguish<any>
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(
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errormonade,
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{
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"nothing": ({}) => {throw (new Error("read von nothing"));},
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"just": ({"value": value}) => value,
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}
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)
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);
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}
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/**
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* @author kcf <vidofnir@folksprak.org>
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*/
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export function propagate<type_value1, type_value2>
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(
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errormonade : type_errormonade<type_value1>,
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funktion : (value1 : type_value1)=>type_errormonade<type_value2>
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)
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: type_errormonade<type_value2>
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{
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return (
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lib_call.distinguish<any>
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(
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errormonade,
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{
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"nothing": ({}) => create_nothing<type_value2>(),
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"just": ({"value": value1}) => funktion(value1),
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}
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)
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);
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}
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}
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