[PATCH] D116318: [clang-format][NFC] Fix a bug in getPreviousToken() in the parser

[Owen Pan via Phabricator via cfe-commits]

This revision was not accepted when it landed; it landed in state "Needs Revision".
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rGd97025ad3a70: [clang-format][NFC] Fix a bug in getPreviousToken() in the parser (authored by owenpan).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D116318/new/

https://reviews.llvm.org/D116318

Files:
  clang/lib/Format/UnwrappedLineParser.cpp


Index: clang/lib/Format/UnwrappedLineParser.cpp
===================================================================
--- clang/lib/Format/UnwrappedLineParser.cpp
+++ clang/lib/Format/UnwrappedLineParser.cpp
@@ -32,7 +32,7 @@
   // Returns the next token in the token stream.
   virtual FormatToken *getNextToken() = 0;
 
-  // Returns the token precedint the token returned by the last call to
+  // Returns the token preceding the token returned by the last call to
   // getNextToken() in the token stream, or nullptr if no such token exists.
   virtual FormatToken *getPreviousToken() = 0;
 
@@ -246,8 +246,7 @@
   }
 
   FormatToken *getPreviousToken() override {
-    assert(Position > 0);
-    return Tokens[Position - 1];
+    return Position > 0 ? Tokens[Position - 1] : nullptr;
   }
 
   FormatToken *peekNextToken() override {


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