Delay the parsing of the document.

src/libs/cplusplus/CppDocument.cpp

@@ -390,6 +390,9 @@ void Document::check(CheckMode mode)
 {
     Q_ASSERT(!_globalNamespace);
 
+    if (! isParsed())
+        parse();
+
     Semantic semantic(_control);
     if (mode == FastCheck)
         semantic.setSkipFunctionBodies(true);
@@ -450,7 +453,6 @@ Document::Ptr Snapshot::documentFromSource(const QByteArray &preprocessedCode,
     }
 
     newDoc->setSource(preprocessedCode);
-    newDoc->parse();
     return newDoc;
 }
 

src/plugins/cpptools/cppsemanticsearch.cpp

@@ -288,6 +288,7 @@ static void semanticSearch_helper(QFutureInterface<Core::Utils::FileSearchResult
         }
 
         Document::Ptr newDoc = snapshot.documentFromSource(source, fileName);
+        newDoc->parse();
 
         if (SemanticSearch *search = factory->create(future, newDoc, snapshot)) {
             search->setSource(source);

src/plugins/cpptools/cpptoolseditorsupport.cpp

@@ -412,6 +412,8 @@ void CppEditorSupport::checkDocumentNow()
     const QByteArray preprocessedCode = snapshot.preprocessedCode(plainText, fileName);
 
     if (Document::Ptr doc = snapshot.documentFromSource(preprocessedCode, fileName)) {
+        doc->parse();
+
         CheckDocument checkDocument(doc, snapshot);
         QList<QuickFixOperationPtr> quickFixes = checkDocument(ed->textCursor());
         if (! quickFixes.isEmpty()) {

src/shared/cplusplus/TranslationUnit.cpp

@@ -255,6 +255,8 @@ bool TranslationUnit::parse(ParseMode mode)
     if (! isTokenized())
         tokenize();
 
+    f._parsed = true;
+
     Parser parser(this);
     parser.setQtMocRunEnabled(f._qtMocRunEnabled);
     parser.setObjCEnabled(f._objCEnabled);