clang-format incorrectly formats C++ lambdas with BeforeLambdaBody true

[tophoo]

Based on #51234 this issue is about the incorrect formatting of C++ lambdas with BeforeLambdaBody true. Content of .clang-format:

BreakBeforeBraces: Custom
BraceWrapping: {
    BeforeLambdaBody: true,
}
ColumnLimit: 0

The problem has been described by @kalinnikovv:
The closing brace of the lambda body always gets folded into the line before it.

foo(param, [] {
return 1;
}());

gets formatted into

foo(param, []
    {
         return 1;  });

while I expect it to become

foo(param, []
    {
         return 1;
    });

[llvmbot]

@llvm/issue-subscribers-clang-format

[fun4jimmy]

The BeforeLambdaBody: true option also does not work with the clang-format 13 option LambdaBodyIndentation: OuterScope, I think this is probably the same issue.

Input:

auto result = function([] () {
// do something
});

Expected Output:

auto result = function([] ()
{
  // do something
});

Actual Output:

auto result = function([] ()
                       {
  // do something
});

Tested with clang-format 15.0.1 bundled with Visual Studio Community 2022 17.4.33122.133.

[owenca]

Based on #51234 this issue is about the incorrect formatting of C++ lambdas with BeforeLambdaBody true. Content of .clang-format:

BreakBeforeBraces: Custom
BraceWrapping: {
    BeforeLambdaBody: true,
}
ColumnLimit: 0

The problem has been described by @kalinnikovv: The closing brace of the lambda body always gets folded into the line before it.

foo(param, [] {
return 1;
}());

gets formatted into

foo(param, []
    {
         return 1;  });

while I expect it to become

foo(param, []
    {
         return 1;
    });

This works as expected in 20.1.7 after adding AllowShortLambdasOnASingleLine: None to the config.

[owenca]

The BeforeLambdaBody: true option also does not work with the clang-format 13 option LambdaBodyIndentation: OuterScope, I think this is probably the same issue.

Input:

auto result = function([] () {
// do something
});
Expected Output:

auto result = function([] ()
{
// do something
});
Actual Output:

auto result = function([] ()
{
// do something
});
Tested with clang-format 15.0.1 bundled with Visual Studio Community 2022 17.4.33122.133.

This works as expected in 20.1.7