[libclang] Pass in the -fallow-editor-placeholders option

This will suppress any live diagnostics caused by editor placeholders in Xcode.

rdar://31833579

llvm-svn: 301542

clang/include/clang/Basic/LangOptions.def

@@ -266,7 +266,8 @@ LANGOPT(SanitizeAddressFieldPadding, 2, 0, "controls how aggressive is ASan "
 
 LANGOPT(XRayInstrument, 1, 0, "controls whether to do XRay instrumentation")
 
-LANGOPT(AllowEditorPlaceholders, 1, 0, "allow editor placeholders in source")
+BENIGN_LANGOPT(AllowEditorPlaceholders, 1, 0,
+               "allow editor placeholders in source")
 
 #undef LANGOPT
 #undef COMPATIBLE_LANGOPT

clang/test/Index/allow-editor-placeholders.cpp

@@ -0,0 +1,5 @@
+// RUN: c-index-test -test-load-source all %s 2>&1 | FileCheck %s
+
+<#placeholder#>;
+
+// CHECK-NOT: error

clang/tools/libclang/CIndex.cpp

@@ -3371,7 +3371,10 @@ clang_parseTranslationUnit_Impl(CXIndex CIdx, const char *source_filename,
     Args->push_back("-Xclang");
     Args->push_back("-detailed-preprocessing-record");
   }
-  
+
+  // Suppress any editor placeholder diagnostics.
+  Args->push_back("-fallow-editor-placeholders");
+
   unsigned NumErrors = Diags->getClient()->getNumErrors();
   std::unique_ptr<ASTUnit> ErrUnit;
   // Unless the user specified that they want the preamble on the first parse