[clang-tidy] readability-braces-around-statements false positive with char literals

Summary:
Single-line if statements cause a false positive when the last token in the conditional statement is a char constant:

```
if (condition)
  return 'a';
```

For some reason `findEndLocation` seems to skips too many (vertical) whitespaces in this case. The same problem already occured with string literals (https://reviews.llvm.org/D25558), and was fixed by adding a special check for this very case. I just extended the condition to also include char constants. No idea what really causes the issue though.

Reviewers: alexfh

Reviewed By: alexfh

Subscribers: xazax.hun, cfe-commits

Patch by Florian Gross!
Differential Revision: https://reviews.llvm.org/D33354

llvm-svn: 303551

diff --git a/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp b/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
index 6f35fe2..4a96b19 100644 (file)
--- a/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
+++ b/clang-tools-extra/clang-tidy/readability/BracesAroundStatementsCheck.cpp
@@ -54,14 +54,15 @@ SourceLocation forwardSkipWhitespaceAndComments(SourceLocation Loc,
 SourceLocation findEndLocation(SourceLocation LastTokenLoc,
                                const SourceManager &SM,
                                const ASTContext *Context) {
-  SourceLocation Loc = LastTokenLoc;
+  SourceLocation Loc =
+      Lexer::GetBeginningOfToken(LastTokenLoc, SM, Context->getLangOpts());
   // Loc points to the beginning of the last (non-comment non-ws) token
   // before end or ';'.
   assert(Loc.isValid());
   bool SkipEndWhitespaceAndComments = true;
   tok::TokenKind TokKind = getTokenKind(Loc, SM, Context);
   if (TokKind == tok::NUM_TOKENS || TokKind == tok::semi ||
-      TokKind == tok::r_brace || isStringLiteral(TokKind)) {
+      TokKind == tok::r_brace) {
     // If we are at ";" or "}", we found the last token. We could use as well
     // `if (isa<NullStmt>(S))`, but it wouldn't work for nested statements.
     SkipEndWhitespaceAndComments = false;