[Support][YAML] Add support for accessing tags and tag handle substitution.

llvm-svn: 193004

1 files changed, 18 insertions, 4 deletions

diff --git a/llvm/utils/yaml-bench/YAMLBench.cpp b/llvm/utils/yaml-bench/YAMLBench.cpp
index eef4a725a1a..f20a4ccc819 100644
--- a/llvm/utils/yaml-bench/YAMLBench.cpp
+++ b/llvm/utils/yaml-bench/YAMLBench.cpp
@@ -63,6 +63,20 @@ static raw_ostream &operator <<(raw_ostream &os, const indent &in) {
   return os;
 }
 
+/// \brief Pretty print a tag by replacing tag:yaml.org,2002: with !!.
+static std::string prettyTag(yaml::Node *N) {
+  std::string Tag = N->getVerbatimTag();
+  if (StringRef(Tag).startswith("tag:yaml.org,2002:")) {
+    std::string Ret = "!!";
+    Ret += StringRef(Tag).substr(18);
+    return std::move(Ret);
+  }
+  std::string Ret = "!<";
+  Ret += Tag;
+  Ret += ">";
+  return Ret;
+}
+
 static void dumpNode( yaml::Node *n
                     , unsigned Indent = 0
                     , bool SuppressFirstIndent = false) {
@@ -76,9 +90,9 @@ static void dumpNode( yaml::Node *n
   if (yaml::ScalarNode *sn = dyn_cast<yaml::ScalarNode>(n)) {
     SmallString<32> Storage;
     StringRef Val = sn->getValue(Storage);
-    outs() << "!!str \"" << yaml::escape(Val) << "\"";
+    outs() << prettyTag(n) << " \"" << yaml::escape(Val) << "\"";
   } else if (yaml::SequenceNode *sn = dyn_cast<yaml::SequenceNode>(n)) {
-    outs() << "!!seq [\n";
+    outs() << prettyTag(n) << " [\n";
     ++Indent;
     for (yaml::SequenceNode::iterator i = sn->begin(), e = sn->end();
                                       i != e; ++i) {
@@ -88,7 +102,7 @@ static void dumpNode( yaml::Node *n
     --Indent;
     outs() << indent(Indent) << "]";
   } else if (yaml::MappingNode *mn = dyn_cast<yaml::MappingNode>(n)) {
-    outs() << "!!map {\n";
+    outs() << prettyTag(n) << " {\n";
     ++Indent;
     for (yaml::MappingNode::iterator i = mn->begin(), e = mn->end();
                                      i != e; ++i) {
@@ -104,7 +118,7 @@ static void dumpNode( yaml::Node *n
   } else if (yaml::AliasNode *an = dyn_cast<yaml::AliasNode>(n)){
     outs() << "*" << an->getName();
   } else if (dyn_cast<yaml::NullNode>(n)) {
-    outs() << "!!null null";
+    outs() << prettyTag(n) << " null";
   }
 }