I’d like to format a set of C++ files so that each function or function template is defined entirely on one line. With input such as:

template <typename T>
void foo(int i)
{
  return;
}

template <int I, typename T>
struct Bar {
  Bar()
  {
  }

  static int testsmf(double d)
  {
    return 42;
  }

  template  <typename U>
  inline void testmft() const {
    int i;
    double longname1;
    double longname2;
    double longname3;
    double longname4;
    double longname5;
  }
};

int main()
{
  return 0;
}

I might look for output approximately so:

template <typename T>void foo(int i){  return;}
    
template <int I, typename T>
struct Bar {
    Bar()  {  }
    
    static int testsmf(double d)  {    return 42;  }
    
    template  <typename U>  inline void testmft() const {    int i;    double longname1;    double longname2;    double longname3;    double longname4;    double longname5;  }
};

int main(){  return 0;}

Currently my clang-format style file (named cf) is minimal:

ColumnLimit: 0
AllowShortFunctionsOnASingleLine: All

I test via clang-format -style=file:./cf test.cpp, but alas the only noticeable change in the output is that each function’s opening brace is placed on the same line as its name. I earlier tried starting with the output of clang-format -style=llvm -dump-config, and changing the two style options as above, but this also didn’t work. Setting ColumnLimit to a large value such as 1000 makes no difference either. I am using ClangFormat version 18.1.3.