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Tighten up the yamilizer so it stops eliding empty sequences if the embedded empty sequence is the first key/value in a map which is itself in a sequence.

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Patch with help from Nick Kledzik.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188508 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Aaron Ballman
2013-08-15 23:17:53 +00:00
parent a630cb032c
commit d5f33aa33f
3 changed files with 84 additions and 2 deletions
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6
include/llvm/Support/YAMLTraits.h
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@ -323,6 +323,7 @@ public:
virtual bool preflightElement(unsigned, void *&) = 0;
virtual void postflightElement(void*) = 0;
virtual void endSequence() = 0;
virtual bool canElideEmptySequence() = 0;
virtual unsigned beginFlowSequence() = 0;
virtual bool preflightFlowElement(unsigned, void *&) = 0;
@ -388,7 +389,7 @@ public:
typename llvm::enable_if_c<has_SequenceTraits<T>::value,void>::type
mapOptional(const char* Key, T& Val) {
// omit key/value instead of outputting empty sequence
if ( this->outputting() && !(Val.begin() != Val.end()) )
if ( this->canElideEmptySequence() && !(Val.begin() != Val.end()) )
return;
this->processKey(Key, Val, false);
}
@ -715,6 +716,7 @@ private:
virtual void endBitSetScalar();
virtual void scalarString(StringRef &);
virtual void setError(const Twine &message);
virtual bool canElideEmptySequence();
class HNode {
public:
@ -837,7 +839,7 @@ public:
virtual void endBitSetScalar();
virtual void scalarString(StringRef &);
virtual void setError(const Twine &message);
virtual bool canElideEmptySequence();
public:
// These are only used by operator<<. They could be private
// if that templated operator could be made a friend.