inconsistent printing extends for interface and class

Prettier 1.14.3 Playground link

--parser babylon

Input:

interface Foo extends
    VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName {}

class Foo extends
    VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName {}

Output:

interface Foo
  extends VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName {}

class Foo extends VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName {}

Expected behavior:

interface Foo extends 
    VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName {}

class Foo extends 
    VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName {}

[appleseedexm]

Since #13358 is a duplicate of this one (dunno how I missed this while searching for an hour, sorry about that), what’s the current status? That breaking works for implements and combinations with implements and extends, this is should behave exactly the same for extends only.

[alexander-akait]

@j-f1 In php we use conditionalGroup for this. Steps:

• Try to print in one line

interface Foo extends MyClass
{
}

interface Foo extends MyClass, MyOtherClass, OtherClass
{
}

• Try to print where interface and extends on same line

interface Foo extends
    VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName
{
}

interface Foo extends
    MyClass,
    MyOtherClass,
    MyOtherOtherOtherClass,
    MyVeryVeryVeryLongClassName
{
}

• Try to print where interface and extends on difference line

interface VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName
    extends VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName
{
}

interface VeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongClassName
    extends
        MyClass,
        MyOtherClass,
        MyOtherOtherOtherClass,
        MyVeryVeryVeryLongClassName
{
}

Maybe we use same logic here ❓