[clang-format] Incorrect Formatting Between clang-format off and clang-format on

[rocfu]

Here is a snippet of isolated and formatted C++ code, but in my configuration, it causes the section between "clang-format off" and "clang-format on" to be formatted. It seems that the SeparateDefinitionBlocks option doesn't prevent formatting and still triggers it before the // clang-format on section.

// clang-format off
void function()
{

}
// clang-format on

The formatting result adds an extra line between the function and the // clang-format on comment:

// clang-format off
void function()
{

}

// clang-format on

My environment:

• clang-format version 17.0.6 and version 18.1.4

.clang-format configuration:

Language:     Cpp
SeparateDefinitionBlocks: Always

[llvmbot]

@llvm/issue-subscribers-clang-format

Author: None (rocfu)

### Title: Incorrect Formatting Between clang-format off and clang-format on

Here is a snippet of isolated and formatted C++ code, but in my configuration, it causes the section between "clang-format off" and "clang-format on" to be formatted. It seems that the SeparateDefinitionBlocks option doesn't prevent formatting and still triggers it before the // clang-format on section.

// clang-format off
void function()
{

}
// clang-format on

The formatting result adds an extra line between the function and the // clang-format on comment:

// clang-format off
void function()
{

}

// clang-format on

My environment:

• clang-format version 17.0.6 and version 18.1.4

.clang-format configuration:

Language:     Cpp
SeparateDefinitionBlocks: Always