Operators

Put spaces between all multi-operand operators so it doesn't look like a bunch of jumbled up math. Don't put spaces for parenthesis.

Accessing an array has no spaces: a[3]

A multi operand operator is such that has a left and right value, such as 2 + 3.

A single operand operator is one that only has a single value, like -2 or ~0x32

C++

Lambdas are weird and they have weird spacing. Just treat every segment as a separate section and apply the relevant style. Here is an example of the proper spacing of a lambda:

(final int foo, final boolean bar) -> int {
    return 42;
}

The sizeof, alignof, *_cast, noexcept, and typeid operators follow the same rules of functions.

There are no spaces for the *, &, and -> (pointer accessing) operators

BAD:

std:: cout<<std::string("hello")+Blah.SPACE +"world";
int a=(1+b/-(s+2));

GOOD:

std::cout << std::string("hello") + Blah.SPACE +"world";
int a = (1 + b / -(s + 2));

Java