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"use strict";
/**
* @license
* Copyright 2017 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 OPTION_ALWAYS = "always";
var Rule = /** @class */ (function (_super) {
tslib_1.__extends(Rule, _super);
function Rule() {
return _super !== null && _super.apply(this, arguments) || this;
}
Rule.prototype.apply = function (sourceFile) {
return this.applyWithFunction(sourceFile, walk, { always: this.ruleArguments.indexOf(OPTION_ALWAYS) !== -1 });
};
/* tslint:disable:object-literal-sort-keys */
Rule.metadata = {
ruleName: "switch-final-break",
description: "Checks whether the final clause of a switch statement ends in \`break;\`.",
optionsDescription: (_a = ["\n If no options are passed, a final 'break;' is forbidden.\n If the \"always\" option is passed this will require a 'break;' to always be present\n unless control flow is escaped in some other way."], _a.raw = ["\n If no options are passed, a final 'break;' is forbidden.\n If the \"always\" option is passed this will require a 'break;' to always be present\n unless control flow is escaped in some other way."], Lint.Utils.dedent(_a)),
options: {
type: "string",
enum: [
OPTION_ALWAYS,
],
},
optionExamples: [true, [true, OPTION_ALWAYS]],
type: "style",
typescriptOnly: false,
};
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING_ALWAYS = "Final clause in 'switch' statement should end with 'break;'.";
Rule.FAILURE_STRING_NEVER = "Final clause in 'switch' statement should not end with 'break;'.";
return Rule;
}(Lint.Rules.AbstractRule));
exports.Rule = Rule;
function walk(ctx) {
var sourceFile = ctx.sourceFile, always = ctx.options.always;
ts.forEachChild(sourceFile, function cb(node) {
if (tsutils_1.isSwitchStatement(node)) {
check(node);
}
ts.forEachChild(node, cb);
});
function check(node) {
var clause = last(node.caseBlock.clauses);
if (clause === undefined) {
return;
}
if (always) {
if (!tsutils_1.endsControlFlow(clause)) {
ctx.addFailureAtNode(clause.getChildAt(0), Rule.FAILURE_STRING_ALWAYS);
}
return;
}
if (clause.statements.length === 0) {
return;
}
var block = clause.statements[0];
var statements = clause.statements.length === 1 && tsutils_1.isBlock(block) ? block.statements : clause.statements;
var lastStatement = last(statements);
if (lastStatement !== undefined && tsutils_1.isBreakStatement(lastStatement)) {
if (lastStatement.label !== undefined) {
var parent = node.parent;
if (!tsutils_1.isLabeledStatement(parent) || parent.label === lastStatement.label) {
// break jumps somewhere else, don't complain
return;
}
}
ctx.addFailureAtNode(lastStatement, Rule.FAILURE_STRING_NEVER);
}
}
}
function last(arr) {
return arr[arr.length - 1];
}
var _a;
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