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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 utils_1 = require("../utils");
var Rule = (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);
};
return Rule;
}(Lint.Rules.AbstractRule));
/* tslint:disable:object-literal-sort-keys */
Rule.metadata = {
ruleName: "number-literal-format",
description: "Checks that decimal literals should begin with '0.' instead of just '.', and should not end with a trailing '0'.",
optionsDescription: "Not configurable.",
options: null,
optionExamples: [true],
type: "style",
typescriptOnly: false,
};
/* tslint:enable:object-literal-sort-keys */
Rule.FAILURE_STRING_LEADING_0 = "Number literal should not have a leading '0'.";
Rule.FAILURE_STRING_TRAILING_0 = "Number literal should not have a trailing '0'.";
Rule.FAILURE_STRING_TRAILING_DECIMAL = "Number literal should not end in '.'.";
Rule.FAILURE_STRING_LEADING_DECIMAL = "Number literal should begin with '0.' and not just '.'.";
Rule.FAILURE_STRING_NOT_UPPERCASE = "Hexadecimal number literal should be uppercase.";
exports.Rule = Rule;
function walk(ctx) {
var sourceFile = ctx.sourceFile;
return ts.forEachChild(sourceFile, function cb(node) {
if (tsutils_1.isNumericLiteral(node)) {
return check(node);
}
return ts.forEachChild(node, cb);
});
function check(node) {
// Apparently the number literal '0.0' has a '.text' of '0', so use '.getText()' instead.
var text = node.getText(sourceFile);
if (text.length <= 1) {
return;
}
if (text.startsWith("0")) {
// Hex/octal/binary number can't have decimal point or exponent, so no other errors possible.
switch (text[1]) {
case "x":
if (!utils_1.isUpperCase(text.slice(2))) {
ctx.addFailureAtNode(node, Rule.FAILURE_STRING_NOT_UPPERCASE);
}
return;
case "o":
case "b":
return;
case ".":
break;
default:
ctx.addFailureAtNode(node, Rule.FAILURE_STRING_LEADING_0);
return;
}
}
var _a = text.split(/e/i), num = _a[0], exp = _a[1];
if (exp !== undefined && (exp.startsWith("-0") || exp.startsWith("0"))) {
ctx.addFailureAt(node.getEnd() - exp.length, exp.length, Rule.FAILURE_STRING_LEADING_0);
}
if (!num.includes(".")) {
return;
}
if (num.startsWith(".")) {
fail(Rule.FAILURE_STRING_LEADING_DECIMAL);
}
if (num.endsWith(".")) {
fail(Rule.FAILURE_STRING_TRAILING_DECIMAL);
}
// Allow '10', but not '1.0'
if (num.endsWith("0")) {
fail(Rule.FAILURE_STRING_TRAILING_0);
}
function fail(message) {
ctx.addFailureAt(node.getStart(sourceFile), num.length, message);
}
}
}
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