documentation parsing. Patch to do typo correction for
documentation commands. Patch was reviewed, along with
great suggestions for improvement, by Doug.
// rdar://12381408
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@181458 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/AST/CommentCommandTraits.h b/include/clang/AST/CommentCommandTraits.h
index d1f5209..629329d 100644
--- a/include/clang/AST/CommentCommandTraits.h
+++ b/include/clang/AST/CommentCommandTraits.h
@@ -142,6 +142,8 @@
llvm_unreachable("the command should be known");
}
+ const CommandInfo *getTypoCorrectCommandInfo(StringRef Typo) const;
+
const CommandInfo *getCommandInfo(unsigned CommandID) const;
const CommandInfo *registerUnknownCommand(StringRef CommandName);
diff --git a/include/clang/Basic/DiagnosticCommentKinds.td b/include/clang/Basic/DiagnosticCommentKinds.td
index 3df03cd..4619e8a 100644
--- a/include/clang/Basic/DiagnosticCommentKinds.td
+++ b/include/clang/Basic/DiagnosticCommentKinds.td
@@ -159,5 +159,9 @@
def warn_unknown_comment_command_name : Warning<
"unknown command tag name">, InGroup<Documentation>, DefaultIgnore;
+def warn_correct_comment_command_name : Warning<
+ "unknown command tag name '%0'; did you mean '%1'?">,
+ InGroup<Documentation>;
+
} // end of documentation issue category
} // end of AST component
diff --git a/lib/AST/CommentCommandTraits.cpp b/lib/AST/CommentCommandTraits.cpp
index e24d542..e4cc84a 100644
--- a/lib/AST/CommentCommandTraits.cpp
+++ b/lib/AST/CommentCommandTraits.cpp
@@ -43,6 +43,33 @@
return getRegisteredCommandInfo(CommandID);
}
+const CommandInfo *
+CommandTraits::getTypoCorrectCommandInfo(StringRef Typo) const {
+ const unsigned MaxEditDistance = 1;
+ unsigned BestEditDistance = MaxEditDistance + 1;
+ SmallVector<const CommandInfo *, 2> BestCommand;
+
+ int NumOfCommands = sizeof(Commands) / sizeof(CommandInfo);
+ for (int i = 0; i < NumOfCommands; i++) {
+ StringRef Name = Commands[i].Name;
+ unsigned MinPossibleEditDistance = abs((int)Name.size() - (int)Typo.size());
+ if (MinPossibleEditDistance > 0 &&
+ Typo.size() / MinPossibleEditDistance < 1)
+ continue;
+ unsigned EditDistance = Typo.edit_distance(Name, true, MaxEditDistance);
+ if (EditDistance > MaxEditDistance)
+ continue;
+ if (EditDistance == BestEditDistance)
+ BestCommand.push_back(&Commands[i]);
+ else if (EditDistance < BestEditDistance) {
+ BestCommand.clear();
+ BestCommand.push_back(&Commands[i]);
+ BestEditDistance = EditDistance;
+ }
+ }
+ return (BestCommand.size() != 1) ? NULL : BestCommand[0];
+}
+
CommandInfo *CommandTraits::createCommandInfoWithName(StringRef CommandName) {
char *Name = Allocator.Allocate<char>(CommandName.size() + 1);
memcpy(Name, CommandName.data(), CommandName.size());
diff --git a/lib/AST/CommentLexer.cpp b/lib/AST/CommentLexer.cpp
index 70410d6..a59bada 100644
--- a/lib/AST/CommentLexer.cpp
+++ b/lib/AST/CommentLexer.cpp
@@ -265,6 +265,7 @@
}
llvm_unreachable("buffer end hit before '*/' was seen");
}
+
} // unnamed namespace
void Lexer::lexCommentText(Token &T) {
@@ -354,8 +355,17 @@
if (!Info) {
formTokenWithChars(T, TokenPtr, tok::unknown_command);
T.setUnknownCommandName(CommandName);
- Diag(T.getLocation(), diag::warn_unknown_comment_command_name);
- return;
+ if (Info = Traits.getTypoCorrectCommandInfo(CommandName)) {
+ StringRef CorrectedName = Info->Name;
+ SourceRange CommandRange(T.getLocation().getLocWithOffset(1),
+ T.getEndLocation());
+ Diag(T.getLocation(), diag::warn_correct_comment_command_name)
+ << CommandName << CorrectedName
+ << FixItHint::CreateReplacement(CommandRange, CorrectedName);
+ } else {
+ Diag(T.getLocation(), diag::warn_unknown_comment_command_name);
+ return;
+ }
}
if (Info->IsVerbatimBlockCommand) {
setupAndLexVerbatimBlock(T, TokenPtr, *BufferPtr, Info);
diff --git a/test/Sema/warn-documentation-fixits.cpp b/test/Sema/warn-documentation-fixits.cpp
index a47b776..79bf769 100644
--- a/test/Sema/warn-documentation-fixits.cpp
+++ b/test/Sema/warn-documentation-fixits.cpp
@@ -57,6 +57,12 @@
/// \deprecated
void test_deprecated_9(int a);
+// rdar://12381408
+// expected-warning@+2 {{unknown command tag name 'retur'; did you mean 'return'?}}
+/// \brief testing fixit
+/// \retur int in FooBar
+int FooBar();
+
// CHECK: fix-it:"{{.*}}":{5:12-5:22}:"a"
// CHECK: fix-it:"{{.*}}":{9:12-9:15}:"aaa"
// CHECK: fix-it:"{{.*}}":{13:13-13:23}:"T"
@@ -68,4 +74,4 @@
// CHECK: fix-it:"{{.*}}":{46:27-46:27}:" __attribute__((deprecated))"
// CHECK: fix-it:"{{.*}}":{50:27-50:27}:" __attribute__((deprecated))"
// CHECK: fix-it:"{{.*}}":{58:30-58:30}:" MY_ATTR_DEPRECATED"
-
+// CHECK: fix-it:"{{.*}}":{63:6-63:11}:"return"
