/// \brief Takes a list of diagnostics that were expected to have been generated
/// but were not and produces a diagnostic to the user from this.
static unsigned PrintExpected(DiagnosticsEngine &Diags, const llvm::SourceMgr &SourceMgr,
DirectiveList &DL, DiagnosticsEngine::Level Kind) {
if (DL.empty())
return 0;
for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
Directive &D = **I;
Diags.ReportError(D.DirectiveLoc,llvm::Twine("Inconsistend verify directive: ")+D.Text);
}
return DL.size();
}
void
DiagnoseFailures(DirectiveList & DL, DirectiveMap & DM) {
for(typename DirectiveList::const_iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
Underlying & Dir = **I;
unsigned int Line = getCompilerInstance().getSourceManager().getExpansionLineNumber(Dir.getLocation());
std::pair<typename DirectiveMap::iterator, typename DirectiveMap::iterator> rng = DM.equal_range(Line);
switch (std::distance(rng.first, rng.second))
{
case 0:
Diags.Report(Dir.getLocation(), ErrVerifyDiagNoCorrespondingDecl);
break;
default:
// Delay evaluation of diagnostics until we are certain that
// none of the statements on this line match
llvm::SmallVector<MaybeDiagnostic, 4> diags;
bool isGood = false;
// TODO: If something is unexpected, then it should not appear in any of the subexpressions.
for(typename DirectiveMap::iterator it = rng.first, end = rng.second; it != end; ++it) {
MaybeDiagnostic MD = Dir.Match(it->second.second,Diags);
// unexpected-<foo> must never fail
if(Dir.isNegate()) {
if(MD.isDiagnostic()) {
diags.push_back(MD);
isGood = false;
break;
}
} else {
if(MD.isDiagnostic())
diags.push_back(MD);
else
isGood = true;
}
}
if(!isGood) {
for(std::size_t ii = 0; ii < diags.size(); ++ii)
diags[ii].maybeReport();
}
break;
}
}
}
/// CheckLists - Compare expected to seen diagnostic lists and return the
/// the difference between them.
///
static unsigned CheckLists(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
const char *Label,
DirectiveList &Left,
const_diag_iterator d2_begin,
const_diag_iterator d2_end) {
DirectiveList LeftOnly;
DiagList Right(d2_begin, d2_end);
for (DirectiveList::iterator I = Left.begin(), E = Left.end(); I != E; ++I) {
Directive& D = **I;
unsigned LineNo1 = SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
for (unsigned i = 0; i < D.Max; ++i) {
DiagList::iterator II, IE;
for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
unsigned LineNo2 = SourceMgr.getPresumedLineNumber(II->first);
if (LineNo1 != LineNo2)
continue;
if (!IsFromSameFile(SourceMgr, D.DiagnosticLoc, II->first))
continue;
const std::string &RightText = II->second;
if (D.match(RightText))
break;
}
if (II == IE) {
// Not found.
if (i >= D.Min) break;
LeftOnly.push_back(*I);
} else {
// Found. The same cannot be found twice.
Right.erase(II);
}
}
}
// Now all that's left in Right are those that were not matched.
unsigned num = PrintExpected(Diags, SourceMgr, LeftOnly, Label);
num += PrintUnexpected(Diags, &SourceMgr, Right.begin(), Right.end(), Label);
return num;
}
static unsigned PrintProblem(Diagnostic &Diags, SourceManager *SourceMgr,
DirectiveList &DL, const char *Kind,
bool Expected) {
if (DL.empty())
return 0;
llvm::SmallString<256> Fmt;
llvm::raw_svector_ostream OS(Fmt);
for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
Directive& D = **I;
if (D.Location.isInvalid() || !SourceMgr)
OS << "\n (frontend)";
else
OS << "\n Line " << SourceMgr->getInstantiationLineNumber(D.Location);
OS << ": " << D.Text;
}
Diags.Report(diag::err_verify_inconsistent_diags)
<< Kind << !Expected << OS.str();
return DL.size();
}
/// \brief Takes a list of diagnostics that were expected to have been generated
/// but were not and produces a diagnostic to the user from this.
static unsigned PrintExpected(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
DirectiveList &DL, const char *Kind) {
if (DL.empty())
return 0;
SmallString<256> Fmt;
llvm::raw_svector_ostream OS(Fmt);
for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
Directive &D = **I;
OS << "\n Line " << SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
if (D.DirectiveLoc != D.DiagnosticLoc)
OS << " (directive at "
<< SourceMgr.getFilename(D.DirectiveLoc) << ":"
<< SourceMgr.getPresumedLineNumber(D.DirectiveLoc) << ")";
OS << ": " << D.Text;
}
Diags.Report(diag::err_verify_inconsistent_diags).setForceEmit()
<< Kind << /*Unexpected=*/false << OS.str();
return DL.size();
}
/// CheckLists - Compare expected to seen diagnostic lists and return the
/// the difference between them.
///
static unsigned CheckLists(Diagnostic &Diags, SourceManager &SourceMgr,
const char *Label,
DirectiveList &Left,
const_diag_iterator d2_begin,
const_diag_iterator d2_end) {
DirectiveList LeftOnly;
DiagList Right(d2_begin, d2_end);
for (DirectiveList::iterator I = Left.begin(), E = Left.end(); I != E; ++I) {
Directive& D = **I;
unsigned LineNo1 = SourceMgr.getInstantiationLineNumber(D.Location);
for (unsigned i = 0; i < D.Count; ++i) {
DiagList::iterator II, IE;
for (II = Right.begin(), IE = Right.end(); II != IE; ++II) {
unsigned LineNo2 = SourceMgr.getInstantiationLineNumber(II->first);
if (LineNo1 != LineNo2)
continue;
const std::string &RightText = II->second;
if (D.Match(RightText))
break;
}
if (II == IE) {
// Not found.
LeftOnly.push_back(*I);
} else {
// Found. The same cannot be found twice.
Right.erase(II);
}
}
}
// Now all that's left in Right are those that were not matched.
return (PrintProblem(Diags, &SourceMgr, LeftOnly, Label, true) +
PrintProblem(Diags, &SourceMgr, Right.begin(), Right.end(),
Label, false));
}
/// \brief Takes a list of diagnostics that were expected to have been generated
/// but were not and produces a diagnostic to the user from this.
static unsigned PrintExpected(DiagnosticsEngine &Diags, llvm::SourceMgr &SourceMgr,
DirectiveList &DL, const char *Kind) {
if (DL.empty())
return 0;
SmallString<256> Fmt;
llvm::raw_svector_ostream OS(Fmt);
for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
Directive &D = **I;
OS << "\n Line " << SourceMgr.getLineAndColumn(D.DiagnosticLoc).first;
if (D.DirectiveLoc != D.DiagnosticLoc) {
int BufID = SourceMgr.FindBufferContainingLoc(D.DirectiveLoc);
OS << " (directive at "
<< SourceMgr.getMemoryBuffer(BufID)->getBufferIdentifier()
<< SourceMgr.getLineAndColumn(D.DirectiveLoc).first << ")";
}
OS << ": " << D.Text;
}
Diags.Report(SourceLocation(), diag::verify_inconsistent_diags)
<< Kind << /*Unexpected=*/false << OS.str();
return DL.size();
}
/// ParseDirective - Go through the comment and see if it indicates expected
/// diagnostics. If so, then put them in the appropriate directive list.
///
static void ParseDirective(const char *CommentStart, unsigned CommentLen,
ExpectedData &ED, Preprocessor &PP,
SourceLocation Pos) {
// A single comment may contain multiple directives.
for (ParseHelper PH(CommentStart, CommentStart+CommentLen); !PH.Done();) {
// search for token: expected
if (!PH.Search("expected"))
break;
PH.Advance();
// next token: -
if (!PH.Next("-"))
continue;
PH.Advance();
// next token: { error | warning | note }
DirectiveList* DL = NULL;
if (PH.Next("error"))
DL = &ED.Errors;
else if (PH.Next("warning"))
DL = &ED.Warnings;
else if (PH.Next("note"))
DL = &ED.Notes;
else
continue;
PH.Advance();
// default directive kind
bool RegexKind = false;
const char* KindStr = "string";
// next optional token: -
if (PH.Next("-re")) {
PH.Advance();
RegexKind = true;
KindStr = "regex";
}
// skip optional whitespace
PH.SkipWhitespace();
// next optional token: positive integer
unsigned Count = 1;
if (PH.Next(Count))
PH.Advance();
// skip optional whitespace
PH.SkipWhitespace();
// next token: {{
if (!PH.Next("{{")) {
PP.Diag(Pos.getFileLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_start) << KindStr;
continue;
}
PH.Advance();
const char* const ContentBegin = PH.C; // mark content begin
// search for token: }}
if (!PH.Search("}}")) {
PP.Diag(Pos.getFileLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_end) << KindStr;
continue;
}
const char* const ContentEnd = PH.P; // mark content end
PH.Advance();
// build directive text; convert \n to newlines
std::string Text;
llvm::StringRef NewlineStr = "\\n";
llvm::StringRef Content(ContentBegin, ContentEnd-ContentBegin);
size_t CPos = 0;
size_t FPos;
while ((FPos = Content.find(NewlineStr, CPos)) != llvm::StringRef::npos) {
Text += Content.substr(CPos, FPos-CPos);
Text += '\n';
CPos = FPos + NewlineStr.size();
}
if (Text.empty())
Text.assign(ContentBegin, ContentEnd);
// construct new directive
Directive *D = Directive::Create(RegexKind, Pos, Text, Count);
std::string Error;
if (D->isValid(Error))
DL->push_back(D);
else {
PP.Diag(Pos.getFileLocWithOffset(ContentBegin-PH.Begin),
diag::err_verify_invalid_content)
<< KindStr << Error;
}
}
}
/// Go through the comment and see if it indicates expected
/// diagnostics. If so, then put them in the appropriate directive list.
///
/// Returns true if any valid directives were found.
static bool ParseDirective(StringRef S, ExpectedData *ED,
const llvm::SourceMgr &SM,
SourceLocation Pos, DiagnosticsEngine &Diags,
VerifyDiagnosticConsumer::DirectiveStatus &Status) {
// A single comment may contain multiple directives.
bool FoundDirective = false;
for (ParseHelper PH(S); !PH.Done();) {
// Search for token: expected
if (!PH.Search("expected", true))
break;
PH.Advance();
// Next token: -
if (!PH.Next("-"))
continue;
PH.Advance();
// Next token: { error | warning | note }
DirectiveList* DL = NULL;
if (PH.Next("diag"))
DL = ED ? &ED->Errors : NULL;
else if (PH.Next("note"))
DL = ED ? &ED->Notes : NULL;
else if (PH.Next("no-diagnostics")) {
if (Status == VerifyDiagnosticConsumer::HasOtherExpectedDirectives)
Diags.Report(Pos, diag::verify_invalid_no_diags)
<< /*IsExpectedNoDiagnostics=*/true;
else
Status = VerifyDiagnosticConsumer::HasExpectedNoDiagnostics;
continue;
} else
continue;
PH.Advance();
if (Status == VerifyDiagnosticConsumer::HasExpectedNoDiagnostics) {
Diags.Report(Pos, diag::verify_invalid_no_diags)
<< /*IsExpectedNoDiagnostics=*/false;
continue;
}
Status = VerifyDiagnosticConsumer::HasOtherExpectedDirectives;
// If a directive has been found but we're not interested
// in storing the directive information, return now.
if (!DL)
return true;
// Default directive kind.
bool RegexKind = false;
const char* KindStr = "string";
// Next optional token: -
if (PH.Next("-re")) {
PH.Advance();
RegexKind = true;
KindStr = "regex";
}
// Next optional token: @
SourceLocation ExpectedLoc;
if (!PH.Next("@")) {
ExpectedLoc = Pos;
} else {
PH.Advance();
unsigned Line = 0;
bool FoundPlus = PH.Next("+");
if (FoundPlus || PH.Next("-")) {
// Relative to current line.
PH.Advance();
unsigned ExpectedLine = SM.getLineAndColumn(Pos).first;
if (PH.Next(Line) && (FoundPlus || Line < ExpectedLine)) {
if (FoundPlus) ExpectedLine += Line;
else ExpectedLine -= Line;
ExpectedLoc = locForLine(SM, Pos, ExpectedLine);
}
} else {
// Absolute line number.
if (PH.Next(Line) && Line > 0)
ExpectedLoc = locForLine(SM, Pos, Line);
}
if (!ExpectedLoc.isValid()) {
Diags.Report(Pos, diag::verify_missing_line) << KindStr;
continue;
}
PH.Advance();
}
// Skip optional whitespace.
PH.SkipWhitespace();
// Next optional token: positive integer or a '+'.
unsigned Min = 1;
unsigned Max = 1;
if (PH.Next(Min)) {
PH.Advance();
// A positive integer can be followed by a '+' meaning min
// or more, or by a '-' meaning a range from min to max.
if (PH.Next("+")) {
Max = Directive::MaxCount;
PH.Advance();
} else if (PH.Next("-")) {
PH.Advance();
if (!PH.Next(Max) || Max < Min) {
Diags.Report(Pos, diag::verify_invalid_range) << KindStr;
continue;
}
PH.Advance();
} else {
Max = Min;
}
} else if (PH.Next("+")) {
// '+' on its own means "1 or more".
Max = Directive::MaxCount;
PH.Advance();
}
// Skip optional whitespace.
PH.SkipWhitespace();
// Next token: {{
if (!PH.Next("{{")) {
Diags.Report(Pos, diag::verify_missing_start) << KindStr;
continue;
}
PH.Advance();
const char* const ContentBegin = PH.C; // mark content begin
// Search for token: }}
if (!PH.Search("}}")) {
Diags.Report(Pos, diag::verify_missing_end) << KindStr;
continue;
}
const char* const ContentEnd = PH.P; // mark content end
PH.Advance();
// Build directive text; convert \n to newlines.
std::string Text;
StringRef NewlineStr = "\\n";
StringRef Content(ContentBegin, ContentEnd-ContentBegin);
size_t CPos = 0;
size_t FPos;
while ((FPos = Content.find(NewlineStr, CPos)) != StringRef::npos) {
Text += Content.substr(CPos, FPos-CPos);
Text += '\n';
CPos = FPos + NewlineStr.size();
}
if (Text.empty())
Text.assign(ContentBegin, ContentEnd);
// Construct new directive.
Directive *D = Directive::create(RegexKind, Pos, ExpectedLoc, Text,
Min, Max);
std::string Error;
if (D->isValid(Error)) {
DL->push_back(D);
FoundDirective = true;
} else {
Diags.Report(Pos, diag::verify_invalid_content) << KindStr << Error;
}
}
return FoundDirective;
}
/// ParseDirective - Go through the comment and see if it indicates expected
/// diagnostics. If so, then put them in the appropriate directive list.
///
/// Returns true if any valid directives were found.
static bool ParseDirective(StringRef S, ExpectedData *ED, SourceManager &SM,
Preprocessor *PP, SourceLocation Pos,
VerifyDiagnosticConsumer::DirectiveStatus &Status) {
DiagnosticsEngine &Diags = PP ? PP->getDiagnostics() : SM.getDiagnostics();
// A single comment may contain multiple directives.
bool FoundDirective = false;
for (ParseHelper PH(S); !PH.Done();) {
// Search for token: expected
if (!PH.Search("expected", true))
break;
PH.Advance();
// Next token: -
if (!PH.Next("-"))
continue;
PH.Advance();
// Next token: { error | warning | note }
DirectiveList *DL = nullptr;
if (PH.Next("error"))
DL = ED ? &ED->Errors : nullptr;
else if (PH.Next("warning"))
DL = ED ? &ED->Warnings : nullptr;
else if (PH.Next("remark"))
DL = ED ? &ED->Remarks : nullptr;
else if (PH.Next("note"))
DL = ED ? &ED->Notes : nullptr;
else if (PH.Next("no-diagnostics")) {
if (Status == VerifyDiagnosticConsumer::HasOtherExpectedDirectives)
Diags.Report(Pos, diag::err_verify_invalid_no_diags)
<< /*IsExpectedNoDiagnostics=*/true;
else
Status = VerifyDiagnosticConsumer::HasExpectedNoDiagnostics;
continue;
} else
continue;
PH.Advance();
if (Status == VerifyDiagnosticConsumer::HasExpectedNoDiagnostics) {
Diags.Report(Pos, diag::err_verify_invalid_no_diags)
<< /*IsExpectedNoDiagnostics=*/false;
continue;
}
Status = VerifyDiagnosticConsumer::HasOtherExpectedDirectives;
// If a directive has been found but we're not interested
// in storing the directive information, return now.
if (!DL)
return true;
// Default directive kind.
bool RegexKind = false;
const char* KindStr = "string";
// Next optional token: -
if (PH.Next("-re")) {
PH.Advance();
RegexKind = true;
KindStr = "regex";
}
// Next optional token: @
SourceLocation ExpectedLoc;
bool MatchAnyLine = false;
if (!PH.Next("@")) {
ExpectedLoc = Pos;
} else {
PH.Advance();
unsigned Line = 0;
bool FoundPlus = PH.Next("+");
if (FoundPlus || PH.Next("-")) {
// Relative to current line.
PH.Advance();
bool Invalid = false;
unsigned ExpectedLine = SM.getSpellingLineNumber(Pos, &Invalid);
if (!Invalid && PH.Next(Line) && (FoundPlus || Line < ExpectedLine)) {
if (FoundPlus) ExpectedLine += Line;
else ExpectedLine -= Line;
ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), ExpectedLine, 1);
}
} else if (PH.Next(Line)) {
// Absolute line number.
if (Line > 0)
ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), Line, 1);
} else if (PP && PH.Search(":")) {
// Specific source file.
StringRef Filename(PH.C, PH.P-PH.C);
PH.Advance();
// Lookup file via Preprocessor, like a #include.
const DirectoryLookup *CurDir;
const FileEntry *FE =
PP->LookupFile(Pos, Filename, false, nullptr, nullptr, CurDir,
nullptr, nullptr, nullptr);
if (!FE) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_file) << Filename << KindStr;
continue;
}
if (SM.translateFile(FE).isInvalid())
SM.createFileID(FE, Pos, SrcMgr::C_User);
if (PH.Next(Line) && Line > 0)
ExpectedLoc = SM.translateFileLineCol(FE, Line, 1);
else if (PH.Next("*")) {
MatchAnyLine = true;
ExpectedLoc = SM.translateFileLineCol(FE, 1, 1);
}
}
if (ExpectedLoc.isInvalid()) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_line) << KindStr;
continue;
}
PH.Advance();
}
// Skip optional whitespace.
PH.SkipWhitespace();
// Next optional token: positive integer or a '+'.
unsigned Min = 1;
unsigned Max = 1;
if (PH.Next(Min)) {
PH.Advance();
// A positive integer can be followed by a '+' meaning min
// or more, or by a '-' meaning a range from min to max.
if (PH.Next("+")) {
Max = Directive::MaxCount;
PH.Advance();
} else if (PH.Next("-")) {
PH.Advance();
if (!PH.Next(Max) || Max < Min) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_invalid_range) << KindStr;
continue;
}
PH.Advance();
} else {
Max = Min;
}
} else if (PH.Next("+")) {
// '+' on its own means "1 or more".
Max = Directive::MaxCount;
PH.Advance();
}
// Skip optional whitespace.
PH.SkipWhitespace();
// Next token: {{
if (!PH.Next("{{")) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_start) << KindStr;
continue;
}
PH.Advance();
const char* const ContentBegin = PH.C; // mark content begin
// Search for token: }}
if (!PH.SearchClosingBrace("{{", "}}")) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_end) << KindStr;
continue;
}
const char* const ContentEnd = PH.P; // mark content end
PH.Advance();
// Build directive text; convert \n to newlines.
std::string Text;
StringRef NewlineStr = "\\n";
StringRef Content(ContentBegin, ContentEnd-ContentBegin);
size_t CPos = 0;
size_t FPos;
while ((FPos = Content.find(NewlineStr, CPos)) != StringRef::npos) {
Text += Content.substr(CPos, FPos-CPos);
Text += '\n';
CPos = FPos + NewlineStr.size();
}
if (Text.empty())
Text.assign(ContentBegin, ContentEnd);
// Check that regex directives contain at least one regex.
if (RegexKind && Text.find("{{") == StringRef::npos) {
Diags.Report(Pos.getLocWithOffset(ContentBegin-PH.Begin),
diag::err_verify_missing_regex) << Text;
return false;
}
// Construct new directive.
std::unique_ptr<Directive> D = Directive::create(
RegexKind, Pos, ExpectedLoc, MatchAnyLine, Text, Min, Max);
std::string Error;
if (D->isValid(Error)) {
DL->push_back(std::move(D));
FoundDirective = true;
} else {
Diags.Report(Pos.getLocWithOffset(ContentBegin-PH.Begin),
diag::err_verify_invalid_content)
<< KindStr << Error;
}
}
return FoundDirective;
}
/// ParseDirective - Go through the comment and see if it indicates expected
/// diagnostics. If so, then put them in the appropriate directive list.
///
/// Returns true if any valid directives were found.
static bool ParseDirective(StringRef S, ExpectedData &ED, SourceManager &SM,
SourceLocation Pos, DiagnosticsEngine &Diags) {
// A single comment may contain multiple directives.
bool FoundDirective = false;
for (ParseHelper PH(S); !PH.Done();) {
// Search for token: expected
if (!PH.Search("expected"))
break;
PH.Advance();
// Next token: -
if (!PH.Next("-"))
continue;
PH.Advance();
// Next token: { error | warning | note }
DirectiveList* DL = NULL;
if (PH.Next("error"))
DL = &ED.Errors;
else if (PH.Next("warning"))
DL = &ED.Warnings;
else if (PH.Next("note"))
DL = &ED.Notes;
else
continue;
PH.Advance();
// Default directive kind.
bool RegexKind = false;
const char* KindStr = "string";
// Next optional token: -
if (PH.Next("-re")) {
PH.Advance();
RegexKind = true;
KindStr = "regex";
}
// Next optional token: @
SourceLocation ExpectedLoc;
if (!PH.Next("@")) {
ExpectedLoc = Pos;
} else {
PH.Advance();
unsigned Line = 0;
bool FoundPlus = PH.Next("+");
if (FoundPlus || PH.Next("-")) {
// Relative to current line.
PH.Advance();
bool Invalid = false;
unsigned ExpectedLine = SM.getSpellingLineNumber(Pos, &Invalid);
if (!Invalid && PH.Next(Line) && (FoundPlus || Line < ExpectedLine)) {
if (FoundPlus) ExpectedLine += Line;
else ExpectedLine -= Line;
ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), ExpectedLine, 1);
}
} else {
// Absolute line number.
if (PH.Next(Line) && Line > 0)
ExpectedLoc = SM.translateLineCol(SM.getFileID(Pos), Line, 1);
}
if (ExpectedLoc.isInvalid()) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_line) << KindStr;
continue;
}
PH.Advance();
}
// Skip optional whitespace.
PH.SkipWhitespace();
// Next optional token: positive integer or a '+'.
unsigned Min = 1;
unsigned Max = 1;
if (PH.Next(Min)) {
PH.Advance();
// A positive integer can be followed by a '+' meaning min
// or more, or by a '-' meaning a range from min to max.
if (PH.Next("+")) {
Max = Directive::MaxCount;
PH.Advance();
} else if (PH.Next("-")) {
PH.Advance();
if (!PH.Next(Max) || Max < Min) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_invalid_range) << KindStr;
continue;
}
PH.Advance();
} else {
Max = Min;
}
} else if (PH.Next("+")) {
// '+' on its own means "1 or more".
Max = Directive::MaxCount;
PH.Advance();
}
// Skip optional whitespace.
PH.SkipWhitespace();
// Next token: {{
if (!PH.Next("{{")) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_start) << KindStr;
continue;
}
PH.Advance();
const char* const ContentBegin = PH.C; // mark content begin
// Search for token: }}
if (!PH.Search("}}")) {
Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
diag::err_verify_missing_end) << KindStr;
continue;
}
const char* const ContentEnd = PH.P; // mark content end
PH.Advance();
// Build directive text; convert \n to newlines.
std::string Text;
StringRef NewlineStr = "\\n";
StringRef Content(ContentBegin, ContentEnd-ContentBegin);
size_t CPos = 0;
size_t FPos;
while ((FPos = Content.find(NewlineStr, CPos)) != StringRef::npos) {
Text += Content.substr(CPos, FPos-CPos);
Text += '\n';
CPos = FPos + NewlineStr.size();
}
if (Text.empty())
Text.assign(ContentBegin, ContentEnd);
// Construct new directive.
Directive *D = Directive::create(RegexKind, Pos, ExpectedLoc, Text,
Min, Max);
std::string Error;
if (D->isValid(Error)) {
DL->push_back(D);
FoundDirective = true;
} else {
Diags.Report(Pos.getLocWithOffset(ContentBegin-PH.Begin),
diag::err_verify_invalid_content)
<< KindStr << Error;
}
}
return FoundDirective;
}
