clang-format: always break all parameters, one per line

Question

I would like my function prototypes / definitions to always separate out parameters into separate lines, regardless of total length. An otherwise default .clang-format with options

BasedOnStyle: Chromium
AlignAfterOpenBracket: 'AlwaysBreak'
BinPackArguments: 'false'
BinPackParameters: 'false'
ColumnLimit: '80'

gives the following formatting

  void foo(float a, float b);

  void foo(float a, float b, float c, float d, float e, float f, float g);

  void
  foo(float a, float b, float c, float d, float e, float f, float g, float h);

  void foo(
      float a,
      float b,
      float c,
      float d,
      float e,
      float f,
      float g,
      float h,
      float i);

I would like for them to all be broken consistently, one parameter per line, like so:

  void foo(
      float a,
      float b);

  void foo(
      float a,
      float b,
      float c,
      float d,
      float e,
      float f,
      float g);

  void foo(
      float a,
      float b,
      float c,
      float d,
      float e,
      float f,
      float g,
      float h);

  void foo(
      float a,
      float b,
      float c,
      float d,
      float e,
      float f,
      float g,
      float h,
      float i);

Is there any mechanism to do this?

Bonus for the bounty: I would additionally like my member function implementations to split on the return type, class name, and function name, so e.g. instead of this:

float A::foo(float a, float b)
{
// ...
}

I'd like this:

float
A::
foo(float a,
    float b)
{
// ...
}

Answer 1

It's not possible.

The only what can be tuned is when a return type is split. By setting penalty PenaltyReturnTypeOnItsOwnLine: 1000, it turns this line

void
foo(float a, float b, ...

into

void foo(
    float a, float b, ...

and by AlwaysBreakAfterReturnType: TopLevelDefinitions format

float A::foo(float a, float b)
{
// ...
}

to

float
A::foo(float a, float b) {
  // ...
}