Expose LambdaIntroducer::DefaultLoc in the AST's LambdaExpr.

Summary:
Source-centric tools need access to the location of a C++11
lambda expression's capture-default ('&' or '=') when it's present.
It's possible for them to find it by re-lexing and re-implementing
rules that Clang's parser has already applied, but the cost of storing
the SourceLocation and making it available to them is 32 bits per
LambdaExpr (a small delta, proportionally), and the simplification in
client code is significant.

Reviewers: rsmith

Reviewed By: rsmith

CC: cfe-commits, klimek, revane

Differential Revision: http://llvm-reviews.chandlerc.com/D1192

llvm-svn: 188121

1 files changed, 5 insertions, 3 deletions

diff --git a/clang/lib/Serialization/ASTWriterStmt.cpp b/clang/lib/Serialization/ASTWriterStmt.cpp
index d8b852136c9..533496d5dc4 100644
--- a/clang/lib/Serialization/ASTWriterStmt.cpp
+++ b/clang/lib/Serialization/ASTWriterStmt.cpp
@@ -6,9 +6,10 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-//  This file implements serialization for Statements and Expressions.
-//
+///
+/// \file
+/// \brief Implements serialization for Statements and Expressions.
+///
 //===----------------------------------------------------------------------===//
 
 #include "clang/Serialization/ASTWriter.h"
@@ -1166,6 +1167,7 @@ void ASTStmtWriter::VisitLambdaExpr(LambdaExpr *E) {
   Record.push_back(NumArrayIndexVars);
   Writer.AddSourceRange(E->IntroducerRange, Record);
   Record.push_back(E->CaptureDefault); // FIXME: stable encoding
+  Writer.AddSourceLocation(E->CaptureDefaultLoc, Record);
   Record.push_back(E->ExplicitParams);
   Record.push_back(E->ExplicitResultType);
   Writer.AddSourceLocation(E->ClosingBrace, Record);