79 lines
3.8 KiB
Plaintext
79 lines
3.8 KiB
Plaintext
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"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
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const utils_1 = require("@typescript-eslint/utils");
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const eslint_utils_1 = require("@typescript-eslint/utils/eslint-utils");
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const util_1 = require("../util");
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exports.default = (0, util_1.createRule)({
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name: 'no-confusing-non-null-assertion',
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meta: {
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type: 'problem',
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docs: {
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description: 'Disallow non-null assertion in locations that may be confusing',
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recommended: 'stylistic',
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},
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fixable: 'code',
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hasSuggestions: true,
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messages: {
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confusingEqual: 'Confusing combinations of non-null assertion and equal test like "a! == b", which looks very similar to not equal "a !== b".',
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confusingAssign: 'Confusing combinations of non-null assertion and equal test like "a! = b", which looks very similar to not equal "a != b".',
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notNeedInEqualTest: 'Unnecessary non-null assertion (!) in equal test.',
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notNeedInAssign: 'Unnecessary non-null assertion (!) in assignment left hand.',
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wrapUpLeft: 'Wrap up left hand to avoid putting non-null assertion "!" and "=" together.',
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},
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schema: [],
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},
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defaultOptions: [],
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create(context) {
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const sourceCode = (0, eslint_utils_1.getSourceCode)(context);
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return {
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'BinaryExpression, AssignmentExpression'(node) {
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function isLeftHandPrimaryExpression(node) {
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return node.type === utils_1.AST_NODE_TYPES.TSNonNullExpression;
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}
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if (node.operator === '==' ||
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node.operator === '===' ||
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node.operator === '=') {
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const isAssign = node.operator === '=';
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const leftHandFinalToken = sourceCode.getLastToken(node.left);
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const tokenAfterLeft = sourceCode.getTokenAfter(node.left);
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if (leftHandFinalToken?.type === utils_1.AST_TOKEN_TYPES.Punctuator &&
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leftHandFinalToken.value === '!' &&
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tokenAfterLeft?.value !== ')') {
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if (isLeftHandPrimaryExpression(node.left)) {
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context.report({
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node,
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messageId: isAssign ? 'confusingAssign' : 'confusingEqual',
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suggest: [
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{
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messageId: isAssign
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? 'notNeedInAssign'
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: 'notNeedInEqualTest',
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fix: (fixer) => [
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fixer.remove(leftHandFinalToken),
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],
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},
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],
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});
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}
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else {
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context.report({
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node,
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messageId: isAssign ? 'confusingAssign' : 'confusingEqual',
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suggest: [
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{
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messageId: 'wrapUpLeft',
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fix: (fixer) => [
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fixer.insertTextBefore(node.left, '('),
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fixer.insertTextAfter(node.left, ')'),
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],
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},
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],
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});
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}
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}
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}
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},
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};
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},
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});
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//# sourceMappingURL=no-confusing-non-null-assertion.js.map
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