Multiline expressions in padding-line-between-statements rule

Tell us about your environment

• ESLint Version: 4.9.0
• Node Version: 6.11.3
• npm Version: 3.10.10

What parser (default, Babel-ESLint, etc.) are you using? AirBnb Please show your full configuration:

Configuration

{
    "parserOptions": {
        "ecmaVersion": 6,
        "sourceType": "script"
    },
    "env": {
        "node": true
    },
    "extends": "airbnb-base",
    "rules": {
        "arrow-parens": ["error", "always"],
        "comma-dangle": ["error", "never"],
        "consistent-return": "off",
        "indent": ["error", 2],
        "max-len": ["error", 200],
        "no-multiple-empty-lines": ["error", {"max": 1, "maxEOF": 1}],
        "no-plusplus": "off",
        "no-underscore-dangle": ["off"],
        "no-use-before-define": ["error", { "functions": false }],
        "object-shorthand": ["off"],
        "padding-line-between-statements": ["error", 
            {"blankLine": "always", "prev": "block", "next": "*"},
            {"blankLine": "always", "prev": "function", "next": "*"},
            {"blankLine": "always", "prev": "block", "next":"*"},
            {"blankLine": "always", "prev": ["cjs-export"], "next": "*"},
            {"blankLine": "always", "prev": ["*"], "next": "cjs-export"}
        ],
        "strict": ["error", "global"]
    }
}

What did you do? Please include the actual source code causing the issue. Would it be or is it already possible to distinguish multiline from single line expressions in the padding-line-between-statements rule? For example:

Distinguish this:

someArray.forEach((x) => doSomething(x));

From this:

someArray.forEach((x) => {
  doSomething(x);
  doAnotherThing(x);
});

What did you expect to happen? I would like to be able to identify multiline expressions in order to enforce blank lines between them and certain other statements.

What actually happened? Please include the actual, raw output from ESLint. No ability to distinguish multi line expressions from single line expressions.

[aladdin-add]

great! I’ll champion this, marked as accepted.

[not-an-aardvark]

It looks like this was also proposed in https://github.com/eslint/eslint/pull/8668 but no one on the team ended up championing the proposal. We can see if anyone is interested in supporting it this time around.