[clang-format] More control of wrapped lambda brace indentation

[rmarker]

Recently, in #135479, the IndentBraces option was extended to apply to wrapped lambda braces.
It would be good to be able to control the indentation separately from the other braces to be able to maintain the previous behaviour.

Also, in my ever continuing quest to convince the various projects at work to adopt clang-format, it would be helpful to be able to independently control this indentation for nested and unnested lambdas.

For example:

auto foo = [] ()
  {
    return true;
  };

function(
    [] ()
    {
      return true;
    });

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: None (rmarker)

Recently, in #135479, the `IndentBraces` option was extended to apply to wrapped lambda braces. It would be good to be able to control the indentation separately from the other braces to be able to maintain the previous behaviour.

Also, in my ever continuing quest to convince the various projects at work to adopt clang-format, it would be helpful to be able to independently control this indentation for nested and unnested lambdas.

For example:

auto foo = [] ()
  {
    return true;
  };

function(
    [] ()
    {
      return true;
    });

[owenca]

Recently, in #135479, the IndentBraces option was extended to apply to wrapped lambda braces. It would be good to be able to control the indentation separately from the other braces to be able to maintain the previous behaviour.

Also, in my ever continuing quest to convince the various projects at work to adopt clang-format, it would be helpful to be able to independently control this indentation for nested and unnested lambdas.

For example:

auto foo = [] ()
{
return true;
};

function(
[] ()
{
return true;
});

@rmarker #135479 was a bug fix for GNU style, no? Do you think it caused a regression for you?

[rmarker]

@rmarker #135479 was a bug fix for GNU style, no? Do you think it caused a regression for you?

Hmm, I think I might have conflated several situations with this particular issue.

There are different opinions on indenting lambda braces across the projects at work, with the desire to control them independently.
It would be helpful to have the option to be able to maintain the prior formatting via Custom for those who prefer GNU without the lambdas indented.

It was also requested to me to allow just indenting the lambda braces and leave the rest.
Then building off that, there was also a request to be able to more selectively control to indent the unnested case.

When investigating what could be done to satisfy everyone, I landed on the solution in #143249, and ended up merging all these cases together in my head when making this issue.