From 881dff36831f30d6b4792e398bc5a28775ac2757 Mon Sep 17 00:00:00 2001
From: Reid Kleckner <reid@kleckner.net>
Date: Fri, 13 Sep 2013 22:00:30 +0000
Subject: Lex and ignore Microsoft's #pragma warning(...)

Summary:
This fixes PR17145 and avoids unknown pragma warnings.

This change does not attempt to map MSVC warning numbers to clang
warning flags.  Perhaps in the future we will implement a mapping for
some common subset of Microsoft warnings, but for now we don't.

Reviewers: rsmith

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1652

llvm-svn: 190726
---
 clang/lib/Frontend/PrintPreprocessedOutput.cpp | 34 ++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'clang/lib/Frontend/PrintPreprocessedOutput.cpp')

diff --git a/clang/lib/Frontend/PrintPreprocessedOutput.cpp b/clang/lib/Frontend/PrintPreprocessedOutput.cpp
index e0ec08fb90a..3e45fc79f40 100644
--- a/clang/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/clang/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -152,6 +152,10 @@ public:
                                    StringRef Namespace);
   virtual void PragmaDiagnostic(SourceLocation Loc, StringRef Namespace,
                                 diag::Mapping Map, StringRef Str);
+  virtual void PragmaWarning(SourceLocation Loc, StringRef WarningSpec,
+                             ArrayRef<int> Ids);
+  virtual void PragmaWarningPush(SourceLocation Loc, int Level);
+  virtual void PragmaWarningPop(SourceLocation Loc);
 
   bool HandleFirstTokOnLine(Token &Tok);
 
@@ -507,6 +511,36 @@ PragmaDiagnostic(SourceLocation Loc, StringRef Namespace,
   setEmittedDirectiveOnThisLine();
 }
 
+void PrintPPOutputPPCallbacks::PragmaWarning(SourceLocation Loc,
+                                             StringRef WarningSpec,
+                                             ArrayRef<int> Ids) {
+  startNewLineIfNeeded();
+  MoveToLine(Loc);
+  OS << "#pragma warning(" << WarningSpec << ':';
+  for (ArrayRef<int>::iterator I = Ids.begin(), E = Ids.end(); I != E; ++I)
+    OS << ' ' << *I;
+  OS << ')';
+  setEmittedDirectiveOnThisLine();
+}
+
+void PrintPPOutputPPCallbacks::PragmaWarningPush(SourceLocation Loc,
+                                                 int Level) {
+  startNewLineIfNeeded();
+  MoveToLine(Loc);
+  OS << "#pragma warning(push";
+  if (Level)
+    OS << ", " << Level;
+  OS << ')';
+  setEmittedDirectiveOnThisLine();
+}
+
+void PrintPPOutputPPCallbacks::PragmaWarningPop(SourceLocation Loc) {
+  startNewLineIfNeeded();
+  MoveToLine(Loc);
+  OS << "#pragma warning(pop)";
+  setEmittedDirectiveOnThisLine();
+}
+
 /// HandleFirstTokOnLine - When emitting a preprocessed file in -E mode, this
 /// is called for the first token on each new line.  If this really is the start
 /// of a new logical line, handle it and return true, otherwise return false.
-- 
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