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[dotfiles/.git] / .config / coc / extensions / node_modules / coc-prettier / node_modules / tslint / lib / rules / noNullUndefinedUnionRule.js

diff --git a/.config/coc/extensions/node_modules/coc-prettier/node_modules/tslint/lib/rules/noNullUndefinedUnionRule.js b/.config/coc/extensions/node_modules/coc-prettier/node_modules/tslint/lib/rules/noNullUndefinedUnionRule.js
new file mode 100644 (file)
index 0000000..ef8203b
--- /dev/null
+++ b/.config/coc/extensions/node_modules/coc-prettier/node_modules/tslint/lib/rules/noNullUndefinedUnionRule.js
@@ -0,0 +1,88 @@
+"use strict";
+/**
+ * @license
+ * Copyright 2019 Palantir Technologies, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+var tslib_1 = require("tslib");
+var tsutils_1 = require("tsutils");
+var ts = require("typescript");
+var Lint = require("../index");
+var Rule = /** @class */ (function (_super) {
+    tslib_1.__extends(Rule, _super);
+    function Rule() {
+        return _super !== null && _super.apply(this, arguments) || this;
+    }
+    Rule.prototype.applyWithProgram = function (sourceFile, program) {
+        return this.applyWithFunction(sourceFile, walk, undefined, program.getTypeChecker());
+    };
+    /* tslint:disable:object-literal-sort-keys */
+    Rule.metadata = {
+        ruleName: "no-null-undefined-union",
+        description: Lint.Utils.dedent(templateObject_1 || (templateObject_1 = tslib_1.__makeTemplateObject(["\n            Disallows explicitly declared or implicitly returned union types with both `null` and\n            `undefined` as members.\n        "], ["\n            Disallows explicitly declared or implicitly returned union types with both \\`null\\` and\n            \\`undefined\\` as members.\n        "]))),
+        rationale: Lint.Utils.dedent(templateObject_2 || (templateObject_2 = tslib_1.__makeTemplateObject(["\n            A union type that includes both `null` and `undefined` is either redundant or fragile.\n            Enforcing the choice between the two allows the `triple-equals` rule to exist without\n            exceptions, and is essentially a more flexible version of the `no-null-keyword` rule.\n            Optional parameters are not considered to have the type `undefined`.\n        "], ["\n            A union type that includes both \\`null\\` and \\`undefined\\` is either redundant or fragile.\n            Enforcing the choice between the two allows the \\`triple-equals\\` rule to exist without\n            exceptions, and is essentially a more flexible version of the \\`no-null-keyword\\` rule.\n            Optional parameters are not considered to have the type \\`undefined\\`.\n        "]))),
+        optionsDescription: "Not configurable.",
+        options: null,
+        optionExamples: [true],
+        type: "functionality",
+        typescriptOnly: true,
+        requiresTypeInfo: true,
+    };
+    /* tslint:enable:object-literal-sort-keys */
+    Rule.FAILURE_STRING = "Union type cannot include both 'null' and 'undefined'.";
+    return Rule;
+}(Lint.Rules.TypedRule));
+exports.Rule = Rule;
+function walk(ctx, tc) {
+    return ts.forEachChild(ctx.sourceFile, function cb(node) {
+        var type = getType(node, tc);
+        if (type !== undefined && isNullUndefinedUnion(type)) {
+            ctx.addFailureAtNode(node, Rule.FAILURE_STRING);
+        }
+        return ts.forEachChild(node, cb);
+    });
+}
+function getType(node, tc) {
+    if (tsutils_1.isUnionTypeNode(node)) {
+        return tc.getTypeAtLocation(node);
+    }
+    else if (tsutils_1.isSignatureDeclaration(node) && node.type === undefined) {
+        // Explicit types should be handled by the first case.
+        var signature = tc.getSignatureFromDeclaration(node);
+        return signature === undefined ? undefined : signature.getReturnType();
+    }
+    else {
+        return undefined;
+    }
+}
+function isNullUndefinedUnion(type) {
+    if (tsutils_1.isTypeReference(type) && type.typeArguments !== undefined) {
+        return type.typeArguments.some(isNullUndefinedUnion);
+    }
+    if (tsutils_1.isUnionType(type)) {
+        var hasNull = false;
+        var hasUndefined = false;
+        for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+            var subType = _a[_i];
+            hasNull = hasNull || subType.getFlags() === ts.TypeFlags.Null;
+            hasUndefined = hasUndefined || subType.getFlags() === ts.TypeFlags.Undefined;
+            if (hasNull && hasUndefined) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+var templateObject_1, templateObject_2;