.config/coc/extensions/node_modules/coc-prettier/node_modules/tslint/lib/rules/noDuplicateSuperRule.js

   1 "use strict";
   2 /**
   3  * @license
   4  * Copyright 2017 Palantir Technologies, Inc.
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *     http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  */
  18 Object.defineProperty(exports, "__esModule", { value: true });
  19 var tslib_1 = require("tslib");
  20 var tsutils_1 = require("tsutils");
  21 var ts = require("typescript");
  22 var Lint = require("../index");
  23 var Rule = /** @class */ (function (_super) {
  24     tslib_1.__extends(Rule, _super);
  25     function Rule() {
  26         return _super !== null && _super.apply(this, arguments) || this;
  27     }
  28     Rule.prototype.apply = function (sourceFile) {
  29         return this.applyWithFunction(sourceFile, walk);
  30     };
  31     /* tslint:disable:object-literal-sort-keys */
  32     Rule.metadata = {
  33         ruleName: "no-duplicate-super",
  34         description: "Warns if 'super()' appears twice in a constructor.",
  35         rationale: "The second call to 'super()' will fail at runtime.",
  36         optionsDescription: "Not configurable.",
  37         options: null,
  38         optionExamples: [true],
  39         type: "functionality",
  40         typescriptOnly: false,
  41     };
  42     /* tslint:enable:object-literal-sort-keys */
  43     Rule.FAILURE_STRING_DUPLICATE = "Multiple calls to 'super()' found. It must be called only once.";
  44     Rule.FAILURE_STRING_LOOP = "'super()' called in a loop. It must be called only once.";
  45     return Rule;
  46 }(Lint.Rules.AbstractRule));
  47 exports.Rule = Rule;
  48 function walk(ctx) {
  49     return ts.forEachChild(ctx.sourceFile, function cb(node) {
  50         if (tsutils_1.isConstructorDeclaration(node) && node.body !== undefined) {
  51             getSuperForNode(node.body);
  52         }
  53         return ts.forEachChild(node, cb);
  54     });
  55     function getSuperForNode(node) {
  56         if (tsutils_1.isIterationStatement(node)) {
  57             var bodySuper = combineSequentialChildren(node);
  58             if (typeof bodySuper === "number") {
  59                 return 0 /* NoSuper */;
  60             }
  61             if (!bodySuper.break) {
  62                 ctx.addFailureAtNode(bodySuper.node, Rule.FAILURE_STRING_LOOP);
  63             }
  64             return tslib_1.__assign({}, bodySuper, { break: false });
  65         }
  66         switch (node.kind) {
  67             case ts.SyntaxKind.ReturnStatement:
  68             case ts.SyntaxKind.ThrowStatement:
  69                 return 1 /* Return */;
  70             case ts.SyntaxKind.BreakStatement:
  71                 return 2 /* Break */;
  72             case ts.SyntaxKind.ClassDeclaration:
  73             case ts.SyntaxKind.ClassExpression:
  74                 // 'super()' is bound differently inside, so ignore.
  75                 return 0 /* NoSuper */;
  76             case ts.SyntaxKind.SuperKeyword:
  77                 return node.parent.kind === ts.SyntaxKind.CallExpression &&
  78                     node.parent.expression === node
  79                     ? { node: node.parent, break: false }
  80                     : 0 /* NoSuper */;
  81             case ts.SyntaxKind.ConditionalExpression: {
  82                 var _a = node, condition = _a.condition, whenTrue = _a.whenTrue, whenFalse = _a.whenFalse;
  83                 var inCondition = getSuperForNode(condition);
  84                 var inBranches = worse(getSuperForNode(whenTrue), getSuperForNode(whenFalse));
  85                 if (typeof inCondition !== "number" && typeof inBranches !== "number") {
  86                     addDuplicateFailure(inCondition.node, inBranches.node);
  87                 }
  88                 return worse(inCondition, inBranches);
  89             }
  90             case ts.SyntaxKind.IfStatement: {
  91                 var _b = node, thenStatement = _b.thenStatement, elseStatement = _b.elseStatement;
  92                 return worse(getSuperForNode(thenStatement), elseStatement !== undefined ? getSuperForNode(elseStatement) : 0 /* NoSuper */);
  93             }
  94             case ts.SyntaxKind.SwitchStatement:
  95                 return getSuperForSwitch(node);
  96             default:
  97                 return combineSequentialChildren(node);
  98         }
  99     }
 100     function getSuperForSwitch(node) {
 101         // 'super()' from any clause. Used to track whether 'super()' happens in the switch at all.
 102         var foundSingle;
 103         // 'super()' from the previous clause if it did not 'break;'.
 104         var fallthroughSingle;
 105         for (var _i = 0, _a = node.caseBlock.clauses; _i < _a.length; _i++) {
 106             var clause = _a[_i];
 107             var clauseSuper = combineSequentialChildren(clause);
 108             switch (clauseSuper) {
 109                 case 0 /* NoSuper */:
 110                     break;
 111                 case 2 /* Break */:
 112                     fallthroughSingle = undefined;
 113                     break;
 114                 case 1 /* Return */:
 115                     return 0 /* NoSuper */;
 116                 default:
 117                     if (fallthroughSingle !== undefined) {
 118                         addDuplicateFailure(fallthroughSingle, clauseSuper.node);
 119                     }
 120                     if (!clauseSuper.break) {
 121                         fallthroughSingle = clauseSuper.node;
 122                     }
 123                     foundSingle = clauseSuper.node;
 124             }
 125         }
 126         return foundSingle !== undefined ? { node: foundSingle, break: false } : 0 /* NoSuper */;
 127     }
 128     /**
 129      * Combines children that come one after another.
 130      * (As opposed to if/else, switch, or loops, which need their own handling.)
 131      */
 132     function combineSequentialChildren(node) {
 133         var seenSingle;
 134         var res = ts.forEachChild(node, function (child) {
 135             var childSuper = getSuperForNode(child);
 136             switch (childSuper) {
 137                 case 0 /* NoSuper */:
 138                     return undefined;
 139                 case 2 /* Break */:
 140                     if (seenSingle !== undefined) {
 141                         return tslib_1.__assign({}, seenSingle, { break: true });
 142                     }
 143                     return childSuper;
 144                 case 1 /* Return */:
 145                     return childSuper;
 146                 default:
 147                     if (seenSingle !== undefined && !seenSingle.break) {
 148                         addDuplicateFailure(seenSingle.node, childSuper.node);
 149                     }
 150                     seenSingle = childSuper;
 151                     return undefined;
 152             }
 153         });
 154         return res !== undefined ? res : seenSingle !== undefined ? seenSingle : 0 /* NoSuper */;
 155     }
 156     function addDuplicateFailure(a, b) {
 157         ctx.addFailure(a.getStart(), b.end, Rule.FAILURE_STRING_DUPLICATE);
 158     }
 159 }
 160 // If/else run separately, so return the branch more likely to result in eventual errors.
 161 function worse(a, b) {
 162     return typeof a === "number"
 163         ? typeof b === "number"
 164             ? a < b
 165                 ? b
 166                 : a
 167             : b
 168         : typeof b === "number"
 169             ? a
 170             : a.break
 171                 ? b
 172                 : a;
 173 }