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swift-module-digester: print node matching details in verbose mode for debugging purposes, NFC.

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Xi Ge
2018-09-28 13:00:29 -07:00
parent b9c1cdefed
commit e31b04495e
1 changed files with 31 additions and 0 deletions
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31
tools/swift-api-digester/swift-api-digester.cpp
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@@ -897,10 +897,41 @@ class PrunePass : public MatchedNodeListener, public SDKTreeDiffPass {
SDKContext &Ctx;
UpdatedNodesMap &UpdateMap;
static void printSpaces(llvm::raw_ostream &OS, SDKNode *N) {
assert(N);
for (auto P = N; !isa<SDKNodeRoot>(P); P = P->getParent())
OS << " ";
}
static void debugMatch(SDKNode *Left, SDKNode *Right, NodeMatchReason Reason,
llvm::raw_ostream &OS) {
if (Left && isa<SDKNodeType>(Left))
return;
if (Right && isa<SDKNodeType>(Right))
return;
StringRef Arrow = " <--------> ";
switch (Reason) {
case NodeMatchReason::Added:
printSpaces(OS, Right);
OS << "<NULL>" << Arrow << Right->getPrintedName() << "\n";
return;
case NodeMatchReason::Removed:
printSpaces(OS, Left);
OS << Left->getPrintedName() << Arrow << "<NULL>\n";
return;
default:
printSpaces(OS, Left);
OS << Left->getPrintedName() << Arrow << Right->getPrintedName() << "\n";
return;
}
}
public:
PrunePass(SDKContext &Ctx): Ctx(Ctx), UpdateMap(Ctx.getNodeUpdateMap()) {}
void foundMatch(NodePtr Left, NodePtr Right, NodeMatchReason Reason) override {
if (options::Verbose)
debugMatch(Left, Right, Reason, llvm::errs());
switch (Reason) {
case NodeMatchReason::Added:
assert(!Left);