[llvm-bugs] [Bug 35111] New: LLVM's YAML output has lots of trailing whitespace

via llvm-bugs llvm-bugs at lists.llvm.org
Fri Oct 27 13:08:26 PDT 2017


            Bug ID: 35111
           Summary: LLVM's YAML output has lots of trailing whitespace
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: Windows NT
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: Support Libraries
          Assignee: unassignedbugs at nondot.org
          Reporter: rnk at google.com
                CC: bigcheesegs at gmail.com, davide at freebsd.org,
                    llvm-bugs at lists.llvm.org, ruiu at google.com

This is observable in any file produced by obj2yaml, and is annoying when
checking in test YAML test cases. Git and other tools complain about trailing
whitespace, and it would be great if we could silence that without manually
removing the whitespace.

The bug is in Output::preflightKey, which pads out the column after emitting
the key name:
  bool Output::preflightKey(const char *Key, bool Required, bool SameAsDefault,
                            bool &UseDefault, void *&) {
    UseDefault = false;
    if (Required || !SameAsDefault || WriteDefaultValues) {
      auto State = StateStack.back();
      if (State == inFlowMapFirstKey || State == inFlowMapOtherKey) {
      } else {
      return true;
    return false;

If there is no value or the value flows onto the next line, the padding
whitespace is left behind trailing.

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