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34 lines
1.1 KiB
JavaScript
34 lines
1.1 KiB
JavaScript
"use strict";
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const { validateArguments } = require("@validatem/core");
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const required = require("@validatem/required");
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const either = require("@validatem/either");
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const node = require("../ast-node");
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const unreachable = require("../unreachable");
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const tagAsType = require("../validators/tag-as-type");
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module.exports = function (operations) {
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const isExpression = require("../validators/operations/is-expression")(operations);
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const isCondition = require("../validators/operations/is-condition")(operations);
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return function not(_expression) {
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let [ expression ] = validateArguments(arguments, {
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expression: [ required, either([
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[ isExpression, tagAsType("expression") ],
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[ isCondition, tagAsType("condition") ],
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])]
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});
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// FIXME: rename expression to something clearer, that indicates its relationship to conditions?
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if (expression.type === "expression") {
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return node({ type: "notExpression", expression: expression.value });
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} else if (expression.type === "condition") {
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return node({ type: "notCondition", condition: expression.value });
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} else {
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unreachable(`Invalid tagged type '${expression.type}'`);
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}
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};
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};
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