init component

node_modules/fp-ts/es6/BooleanAlgebra.js

@@ -0,0 +1,78 @@
+/**
+ * Boolean algebras are Heyting algebras with the additional constraint that the law of the excluded middle is true
+ * (equivalently, double-negation is true).
+ *
+ * Instances should satisfy the following laws in addition to the `HeytingAlgebra` laws:
+ *
+ * - Excluded middle: `a ∨ ¬a <-> 1`
+ *
+ * Boolean algebras generalize classical logic: one is equivalent to "true" and zero is equivalent to "false".
+ *
+ * @since 2.0.0
+ */
+import { getBooleanAlgebra } from './function';
+// -------------------------------------------------------------------------------------
+// combinators
+// -------------------------------------------------------------------------------------
+/**
+ * Every boolean algebras has a dual algebra, which involves reversing one/zero as well as join/meet.
+ *
+ * @since 2.10.0
+ */
+export var reverse = function (B) { return ({
+    meet: function (x, y) { return B.join(x, y); },
+    join: function (x, y) { return B.meet(x, y); },
+    zero: B.one,
+    one: B.zero,
+    implies: function (x, y) { return B.join(B.not(x), y); },
+    not: B.not
+}); };
+// -------------------------------------------------------------------------------------
+// instances
+// -------------------------------------------------------------------------------------
+/**
+ * @category instances
+ * @since 2.0.0
+ */
+export var booleanAlgebraVoid = {
+    meet: function () { return undefined; },
+    join: function () { return undefined; },
+    zero: undefined,
+    one: undefined,
+    implies: function () { return undefined; },
+    not: function () { return undefined; }
+};
+// -------------------------------------------------------------------------------------
+// deprecated
+// -------------------------------------------------------------------------------------
+/**
+ * Use [`reverse`](#reverse) instead.
+ *
+ * @category zone of death
+ * @since 2.0.0
+ * @deprecated
+ */
+export var getDualBooleanAlgebra = reverse;
+/**
+ * Use [`BooleanAlgebra`](./boolean.ts.html#booleanalgebra) instead.
+ *
+ * @category zone of death
+ * @since 2.0.0
+ * @deprecated
+ */
+export var booleanAlgebraBoolean = {
+    meet: function (x, y) { return x && y; },
+    join: function (x, y) { return x || y; },
+    zero: false,
+    one: true,
+    implies: function (x, y) { return !x || y; },
+    not: function (x) { return !x; }
+};
+/**
+ * Use [`getBooleanAlgebra`](./function.ts.html#getbooleanalgebra) instead.
+ *
+ * @category zone of death
+ * @since 2.0.0
+ * @deprecated
+ */
+export var getFunctionBooleanAlgebra = getBooleanAlgebra;