[Syntax] Add assertion to catch invalid tokens early. NFC

To help with identifiying root cause of a crash we are seeing.

llvm-svn: 365599

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/Tooling/Syntax/Tokens.cpp b/clang/lib/Tooling/Syntax/Tokens.cpp
index b42d5a2ca64..d82dc1f35c9 100644
--- a/clang/lib/Tooling/Syntax/Tokens.cpp
+++ b/clang/lib/Tooling/Syntax/Tokens.cpp
@@ -35,6 +35,12 @@
 using namespace clang;
 using namespace clang::syntax;
 
+syntax::Token::Token(SourceLocation Location, unsigned Length,
+                     tok::TokenKind Kind)
+    : Location(Location), Length(Length), Kind(Kind) {
+  assert(Location.isValid());
+}
+
 syntax::Token::Token(const clang::Token &T)
     : Token(T.getLocation(), T.getLength(), T.getKind()) {
   assert(!T.isAnnotation());