fp-ts/lib/StateT.js

Functional programming in TypeScript

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.of = of;
exports.map = map;
exports.ap = ap;
exports.chain = chain;
exports.flatMap = flatMap;
exports.fromState = fromState;
exports.fromF = fromF;
exports.evaluate = evaluate;
exports.execute = execute;
exports.getStateM = getStateM;
var function_1 = require("./function");
var ReadonlyTuple_1 = require("./ReadonlyTuple");
function of(F) {
    return function (a) { return function (s) { return F.of([a, s]); }; };
}
function map(F) {
    return function (f) { return function (fa) { return function (s) { return F.map(fa(s), function (_a) {
        var a = _a[0], s1 = _a[1];
        return [f(a), s1];
    }); }; }; };
}
function ap(M) {
    return function (fa) { return function (fab) { return function (s) { return M.chain(fab(s), function (_a) {
        var f = _a[0], s = _a[1];
        return M.map(fa(s), function (_a) {
            var a = _a[0], s = _a[1];
            return [f(a), s];
        });
    }); }; }; };
}
function chain(M) {
    var flatMapM = flatMap(M);
    return function (f) { return function (ma) { return flatMapM(ma, f); }; };
}
/** @internal */
function flatMap(M) {
    return function (ma, f) { return function (s) { return M.chain(ma(s), function (_a) {
        var a = _a[0], s1 = _a[1];
        return f(a)(s1);
    }); }; };
}
function fromState(F) {
    return function (sa) { return function (s) { return F.of(sa(s)); }; };
}
function fromF(F) {
    return function (ma) { return function (s) { return F.map(ma, function (a) { return [a, s]; }); }; };
}
function evaluate(F) {
    return function (s) { return function (ma) { return F.map(ma(s), function (_a) {
        var a = _a[0];
        return a;
    }); }; };
}
function execute(F) {
    return function (s) { return function (ma) { return F.map(ma(s), ReadonlyTuple_1.snd); }; };
}
/** @deprecated */
/* istanbul ignore next */
function getStateM(M) {
    var _ap = ap(M);
    var _map = map(M);
    var _chain = chain(M);
    var _evaluate = evaluate(M);
    var _execute = execute(M);
    return {
        map: function (fa, f) { return (0, function_1.pipe)(fa, _map(f)); },
        ap: function (fab, fa) { return (0, function_1.pipe)(fab, _ap(fa)); },
        of: of(M),
        chain: function (ma, f) { return (0, function_1.pipe)(ma, _chain(f)); },
        get: function () { return function (s) { return M.of([s, s]); }; },
        put: function (s) { return function () { return M.of([undefined, s]); }; },
        modify: function (f) { return function (s) { return M.of([undefined, f(s)]); }; },
        gets: function (f) { return function (s) { return M.of([f(s), s]); }; },
        fromState: fromState(M),
        fromM: fromF(M),
        evalState: function (fa, s) { return (0, function_1.pipe)(fa, _evaluate(s)); },
        execState: function (fa, s) { return (0, function_1.pipe)(fa, _execute(s)); }
    };
}