[PATCH] D139281: [clang-format] Fix an assertion failure in block parsing

[Owen Pan via Phabricator via cfe-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG15f121e85384: [clang-format] Fix an assertion failure in block parsing (authored by owenpan).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D139281/new/

https://reviews.llvm.org/D139281

Files:
  clang/lib/Format/FormatToken.h
  clang/lib/Format/UnwrappedLineParser.cpp
  clang/lib/Format/UnwrappedLineParser.h
  clang/unittests/Format/FormatTest.cpp


Index: clang/unittests/Format/FormatTest.cpp
===================================================================
--- clang/unittests/Format/FormatTest.cpp
+++ clang/unittests/Format/FormatTest.cpp
@@ -6602,6 +6602,13 @@
                "  x = 1;\n"
                "FOO_END(Baz)",
                Style);
+
+  Style.RemoveBracesLLVM = true;
+  verifyNoCrash("for (;;)\n"
+                "  FOO_BEGIN\n"
+                "    foo();\n"
+                "  FOO_END",
+                Style);
 }
 
 //===----------------------------------------------------------------------===//
Index: clang/lib/Format/UnwrappedLineParser.h
===================================================================
--- clang/lib/Format/UnwrappedLineParser.h
+++ clang/lib/Format/UnwrappedLineParser.h
@@ -143,6 +143,7 @@
   void parseUnbracedBody(bool CheckEOF = false);
   void handleAttributes();
   bool handleCppAttributes();
+  bool isBlockBegin(const FormatToken &Tok) const;
   FormatToken *parseIfThenElse(IfStmtKind *IfKind, bool KeepBraces = false);
   void parseTryCatch();
   void parseLoopBody(bool KeepBraces, bool WrapRightBrace);
Index: clang/lib/Format/UnwrappedLineParser.cpp
===================================================================
--- clang/lib/Format/UnwrappedLineParser.cpp
+++ clang/lib/Format/UnwrappedLineParser.cpp
@@ -2739,6 +2739,14 @@
   return false;
 }
 
+/// Returns whether \c Tok begins a block.
+bool UnwrappedLineParser::isBlockBegin(const FormatToken &Tok) const {
+  // FIXME: rename the function or make
+  // Tok.isOneOf(tok::l_brace, TT_MacroBlockBegin) work.
+  return Style.isVerilog() ? Keywords.isVerilogBegin(Tok)
+                           : Tok.is(tok::l_brace);
+}
+
 FormatToken *UnwrappedLineParser::parseIfThenElse(IfStmtKind *IfKind,
                                                   bool KeepBraces) {
   assert(FormatTok->is(tok::kw_if) && "'if' expected");
@@ -2764,7 +2772,7 @@
   FormatToken *IfLeftBrace = nullptr;
   IfStmtKind IfBlockKind = IfStmtKind::NotIf;
 
-  if (Keywords.isBlockBegin(*FormatTok, Style)) {
+  if (isBlockBegin(*FormatTok)) {
     FormatTok->setFinalizedType(TT_ControlStatementLBrace);
     IfLeftBrace = FormatTok;
     CompoundStatementIndenter Indenter(this, Style, Line->Level);
@@ -2796,7 +2804,7 @@
     }
     nextToken();
     handleAttributes();
-    if (Keywords.isBlockBegin(*FormatTok, Style)) {
+    if (isBlockBegin(*FormatTok)) {
       const bool FollowedByIf = Tokens->peekNextToken()->is(tok::kw_if);
       FormatTok->setFinalizedType(TT_ElseLBrace);
       ElseLeftBrace = FormatTok;
@@ -3063,7 +3071,7 @@
 void UnwrappedLineParser::parseLoopBody(bool KeepBraces, bool WrapRightBrace) {
   keepAncestorBraces();
 
-  if (Keywords.isBlockBegin(*FormatTok, Style)) {
+  if (isBlockBegin(*FormatTok)) {
     if (!KeepBraces)
       FormatTok->setFinalizedType(TT_ControlStatementLBrace);
     FormatToken *LeftBrace = FormatTok;
Index: clang/lib/Format/FormatToken.h
===================================================================
--- clang/lib/Format/FormatToken.h
+++ clang/lib/Format/FormatToken.h
@@ -1785,12 +1785,6 @@
                                     kw_input, kw_output, kw_sequence)));
   }
 
-  /// Whether the token begins a block.
-  bool isBlockBegin(const FormatToken &Tok, const FormatStyle &Style) const {
-    return Tok.is(TT_MacroBlockBegin) ||
-           (Style.isVerilog() ? isVerilogBegin(Tok) : Tok.is(tok::l_brace));
-  }
-
 private:
   /// The JavaScript keywords beyond the C++ keyword set.
   std::unordered_set<IdentifierInfo *> JsExtraKeywords;


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