prefer-literal-enum-member.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const util_1 = require("../util");
exports.default = util_1.createRule({
name: 'prefer-literal-enum-member',
meta: {
type: 'suggestion',
docs: {
description: 'Require that all enum members be literal values to prevent unintended enum member name shadow issues',
category: 'Best Practices',
recommended: false,
requiresTypeChecking: false,
},
messages: {
notLiteral: `Explicit enum value must only be a literal value (string, number, boolean, etc).`,
},
schema: [],
},
defaultOptions: [],
create(context) {
return {
TSEnumMember(node) {
// If there is no initializer, then this node is just the name of the member, so ignore.
if (node.initializer == null) {
return;
}
// any old literal
if (node.initializer.type === experimental_utils_1.AST_NODE_TYPES.Literal) {
return;
}
// TemplateLiteral without expressions
if (node.initializer.type === experimental_utils_1.AST_NODE_TYPES.TemplateLiteral &&
node.initializer.expressions.length === 0) {
return;
}
// -1 and +1
if (node.initializer.type === experimental_utils_1.AST_NODE_TYPES.UnaryExpression &&
['+', '-'].includes(node.initializer.operator) &&
node.initializer.argument.type === experimental_utils_1.AST_NODE_TYPES.Literal) {
return;
}
context.report({
node: node.id,
messageId: 'notLiteral',
});
},
};
},
});
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