333

schangxiang@126.com

2025-09-19 18966e02fb573c7e2bb0c6426ed792b38b910940

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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var ts = require("typescript");
var Lint = require("tslint");
var Rule = (function (_super) {
    tslib_1.__extends(Rule, _super);
    function Rule() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    Rule.prototype.apply = function (sourceFile) {
        var walker = new NoExtraBooleanCastWalker(sourceFile, this.getOptions());
        return this.applyWithWalker(walker);
    };
    Rule.FAILURE_STRING = {
        if: 'redundant double negation in an if statement condition',
        do: 'redundant double negation in a do while loop condition',
        while: 'redundant double negation in a while loop condition',
        ternaryif: 'redundant double negation in a ternary condition',
        for: 'redundant double negation in a for loop condition',
        unaryCast: 'redundant multiple negation',
        objectCast: 'redundant double negation in call to Boolean()',
        newCast: 'redundant double negation in Boolean constructor call'
    };
    return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
var NoExtraBooleanCastWalker = (function (_super) {
    tslib_1.__extends(NoExtraBooleanCastWalker, _super);
    function NoExtraBooleanCastWalker() {
        return _super !== null && _super.apply(this, arguments) || this;
    }
    NoExtraBooleanCastWalker.prototype.visitPrefixUnaryExpression = function (node) {
        this.validateNoExtraBoolean(node);
        _super.prototype.visitPrefixUnaryExpression.call(this, node);
    };
    NoExtraBooleanCastWalker.prototype.validateNoExtraBoolean = function (node) {
        if (!node.parent || !node.parent.parent) {
            return;
        }
        var parent = node.parent;
        var grandparent = parent.parent;
        if (node.operator !== ts.SyntaxKind.ExclamationToken ||
            parent.kind !== ts.SyntaxKind.PrefixUnaryExpression ||
            parent.operator !== ts.SyntaxKind.ExclamationToken ||
            !grandparent) {
            return;
        }
        if (grandparent.kind === ts.SyntaxKind.BinaryExpression) {
            grandparent = grandparent.parent;
        }
        if (!grandparent) {
            return;
        }
        if (grandparent.kind === ts.SyntaxKind.IfStatement) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.if));
        }
        else if (grandparent.kind === ts.SyntaxKind.DoStatement) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.do));
        }
        else if (grandparent.kind === ts.SyntaxKind.WhileStatement) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.while));
        }
        else if (grandparent.kind === ts.SyntaxKind.ConditionalExpression && parent === grandparent.condition) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.ternaryif));
        }
        else if (grandparent.kind === ts.SyntaxKind.ForStatement && parent === grandparent.condition) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.for));
        }
        else if (grandparent.kind === ts.SyntaxKind.PrefixUnaryExpression && grandparent.operator === ts.SyntaxKind.ExclamationToken) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.unaryCast));
        }
        else if (grandparent.kind === ts.SyntaxKind.CallExpression && /^Boolean/.test(grandparent.getText())) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.objectCast));
        }
        else if (grandparent.kind === ts.SyntaxKind.NewExpression && /^new Boolean/.test(grandparent.getText())) {
            this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.FAILURE_STRING.newCast));
        }
    };
    return NoExtraBooleanCastWalker;
}(Lint.RuleWalker));
 
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