[llvm-bugs] [Bug 38873] New: Unexpected breaks after 'endl'

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=38873

            Bug ID: 38873
           Summary: Unexpected breaks after 'endl'
           Product: clang
           Version: 6.0
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Formatter
          Assignee: unassignedclangbugs at nondot.org
          Reporter: jzpigtc4zsi at 0box.eu
                CC: djasper at google.com, klimek at google.com,
                    llvm-bugs at lists.llvm.org

If ColumnLimit high enough (but not zero) then the statement fits in a single
line:

$ echo -e 'void fu(void) {\ncerr << endl << endl << "A" << endl << endl << endl
<< "B" << endl;\n}' |clang-format -style="{BasedOnStyle: LLVM, ColumnLimit:
200, AlignAfterOpenBracket: DontAlign, AlignOperands: false}"

void fu(void) { cerr << endl << endl << "A" << endl << endl << endl << "B" <<
endl; }

If ColumnLimit does not allow single line, then the line is breaked (wrapped)
-- but into too many pieces:

$ echo -e 'void fu(void) {\ncerr << endl << endl << "A" << endl << endl << endl
<< "B" << endl;\n}' |clang-format -style="{BasedOnStyle: LLVM, ColumnLimit: 60,
AlignAfterOpenBracket: DontAlign, AlignOperands: false}"

void fu(void) {
  cerr << endl
       << endl
       << "A" << endl
       << endl
       << endl
       << "B" << endl;
}

After each and every 'endl' a break is introduced. Why? Any rationale or
intention?

Moreover, "ColumnLimit: 0" ("infinite limit") is NOT respected! I expected the
same behaviour as with "ColumnLimit: 220" (or 20000 or any very high value).

$ echo -e 'void fu(void) {\ncerr << endl << endl << "A" << endl << endl << endl
<< "B" << endl;\n}' |clang-format -style="{BasedOnStyle: LLVM, ColumnLimit: 0,
AlignAfterOpenBracket: DontAlign, AlignOperands: false}"

void fu(void) {
  cerr << endl
       << endl
       << "A" << endl
       << endl
       << endl
       << "B" << endl;
}

Moreover, alignment occurs, despite that alignments are prohibited (each type).

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