Issue 153448
Summary [clang-format] bit-field that has its size specified using a variable with `::` can be misformatted
Labels clang-format
Assignees
Reporter joelhock
    clang-format version 20.1.0 (https://github.com/llvm/llvm-project.git https://github.com/llvm/llvm-project/commit/24a30daaa559829ad079f2ff7f73eb4e18095f88) correctly formatted this code:
```
struct struct_with_constexpr {
  static constexpr unsigned int i_am_a_constexpr_lengthhhhh = 2;
};

struct foo {
 uint8_t i_am_a_bit_field_this_long
      : struct_with_constexpr::i_am_a_constexpr_lengthhhhh;
};
```
whereas clang-format version 21.1.0-rc3 (https://github.com/llvm/llvm-project.git https://github.com/llvm/llvm-project/commit/6096d35ea93c75f648a253a00775b4d74915c819) misformats it, breaking on the `::`
```
struct struct_with_constexpr {
 static constexpr unsigned int i_am_a_constexpr_lengthhhhh = 2;
};

struct foo {
  uint8_t i_am_a_bit_field_this_long : struct_with_constexpr::
 i_am_a_constexpr_lengthhhhh;
};
```
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