forked from typescript-eslint/typescript-eslint
/
lines-between-class-members.ts
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/
lines-between-class-members.ts
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import {
AST_NODE_TYPES,
TSESTree,
} from '@typescript-eslint/experimental-utils';
import baseRule from 'eslint/lib/rules/lines-between-class-members';
import * as util from '../util';
type Options = util.InferOptionsTypeFromRule<typeof baseRule>;
type MessageIds = util.InferMessageIdsTypeFromRule<typeof baseRule>;
const schema = util.deepMerge(
{ ...baseRule.meta.schema },
{
1: {
exceptAfterOverload: {
type: 'boolean',
default: true,
},
},
},
);
export default util.createRule<Options, MessageIds>({
name: 'lines-between-class-members',
meta: {
type: 'layout',
docs: {
description: 'Require or disallow an empty line between class members',
category: 'Stylistic Issues',
recommended: false,
extendsBaseRule: true,
},
fixable: 'whitespace',
schema,
messages: baseRule.meta.messages ?? {
never: 'Unexpected blank line between class members.',
always: 'Expected blank line between class members.',
},
},
defaultOptions: [
'always',
{
exceptAfterOverload: true,
exceptAfterSingleLine: false,
},
],
create(context, options) {
const rules = baseRule.create(context);
const exceptAfterOverload =
options[1]?.exceptAfterOverload && options[0] === 'always';
function isOverload(node: TSESTree.Node): boolean {
return (
node.type === AST_NODE_TYPES.MethodDefinition &&
node.value.type === AST_NODE_TYPES.TSEmptyBodyFunctionExpression
);
}
return {
ClassBody(node): void {
const body = exceptAfterOverload
? node.body.filter(node => !isOverload(node))
: node.body;
rules.ClassBody({ ...node, body });
},
};
},
});