//===--- Diagnostic.cpp - Fortran Language Diagnostic Handling ------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file defines the Diagnostic-related interfaces.
//
//===----------------------------------------------------------------------===//

#include "flang/Basic/Diagnostic.h"
#include "flang/Basic/IdentifierTable.h"
#include "flang/AST/Type.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/Twine.h"

namespace flang {

bool DiagnosticsEngine::hadErrors() {
  return Client->getNumErrors() != 0;
}

bool DiagnosticsEngine::hadWarnings() {
  return Client->getNumWarnings() != 0;
}

void DiagnosticsEngine::Reset() {
  ErrorOccurred = false;
  UncompilableErrorOccurred = false;
  FatalErrorOccurred = false;
  UnrecoverableErrorOccurred = false;

  NumWarnings = 0;
  NumErrors = 0;
  NumErrorsSuppressed = 0;
  TrapNumErrorsOccurred = 0;
  TrapNumUnrecoverableErrorsOccurred = 0;

  CurDiagID = ~0U;
  LastDiagLevel = DiagnosticIDs::Ignored;
  DelayedDiagID = 0;

  // Clear state related to #pragma diagnostic.
  DiagStates.clear();
  DiagStatePoints.clear();
  DiagStateOnPushStack.clear();

  // Create a DiagState and DiagStatePoint representing diagnostic changes
  // through command-line.
  DiagStates.push_back(DiagState());
  DiagStatePoints.push_back(DiagStatePoint(&DiagStates.back(), SourceLocation()));
}

void DiagnosticsEngine::ReportDelayed() {
  Report(DelayedDiagID) << DelayedDiagArg1 << DelayedDiagArg2;
  DelayedDiagID = 0;
  DelayedDiagArg1.clear();
  DelayedDiagArg2.clear();
}

DiagnosticsEngine::DiagStatePointsTy::iterator
DiagnosticsEngine::GetDiagStatePointForLoc(SourceLocation L) const {
  return DiagStatePoints.end() - 1;

  assert(!DiagStatePoints.empty());
  assert(DiagStatePoints.front().Loc.isValid() &&
         "Should have created a DiagStatePoint for command-line");

  if (!SrcMgr)
    return DiagStatePoints.end() - 1;

  if (!L.isValid())
    return DiagStatePoints.end() - 1;

  DiagStatePointsTy::iterator Pos = DiagStatePoints.end();
  SourceLocation LastStateChangePos = DiagStatePoints.back().Loc;
  if (DiagStatePoints.back().Loc.isValid() &&
      L.getPointer() < LastStateChangePos.getPointer())
    Pos = std::upper_bound(DiagStatePoints.begin(), DiagStatePoints.end(),
                           DiagStatePoint(0, L));
  --Pos;
  return Pos;
}

void DiagnosticsEngine::setDiagnosticMapping(diag::kind Diag, diag::Mapping Map,
                                             SourceLocation L) {
  assert(Diag < diag::DIAG_UPPER_LIMIT &&
         "Can only map builtin diagnostics");
  assert((Diags->isBuiltinWarningOrExtension(Diag) ||
          (Map == diag::MAP_FATAL || Map == diag::MAP_ERROR)) &&
         "Cannot map errors into warnings!");
  assert(!DiagStatePoints.empty());
  assert((L.isValid() || SrcMgr) && "No SourceMgr for valid location");

  SourceLocation Loc = L;
  SourceLocation LastStateChangePos = DiagStatePoints.back().Loc;
  // Don't allow a mapping to a warning override an error/fatal mapping.
  if (Map == diag::MAP_WARNING) {
    DiagnosticMappingInfo &Info = GetCurDiagState()->getOrAddMappingInfo(Diag);
    if (Info.getMapping() == diag::MAP_ERROR ||
        Info.getMapping() == diag::MAP_FATAL)
      Map = Info.getMapping();
  }
  DiagnosticMappingInfo MappingInfo = makeMappingInfo(Map, L);

  // Common case; setting all the diagnostics of a group in one place.
  if (!Loc.isValid() || Loc == LastStateChangePos) {
    GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
    return;
  }

  // Another common case; modifying diagnostic state in a source location
  // after the previous one.
  if ((Loc.isValid() && !LastStateChangePos.isValid()) ||
      LastStateChangePos.getPointer() < Loc.getPointer()) {
    // A diagnostic pragma occurred, create a new DiagState initialized with
    // the current one and a new DiagStatePoint to record at which location
    // the new state became active.
    DiagStates.push_back(*GetCurDiagState());
    PushDiagStatePoint(&DiagStates.back(), Loc);
    GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
    return;
  }

  // We allow setting the diagnostic state in random source order for
  // completeness but it should not be actually happening in normal practice.

  DiagStatePointsTy::iterator Pos = GetDiagStatePointForLoc(Loc);
  assert(Pos != DiagStatePoints.end());

  // Update all diagnostic states that are active after the given location.
  for (DiagStatePointsTy::iterator
         I = Pos+1, E = DiagStatePoints.end(); I != E; ++I) {
    GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
  }

  // If the location corresponds to an existing point, just update its state.
  if (Pos->Loc == Loc) {
    GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
    return;
  }

  // Create a new state/point and fit it into the vector of DiagStatePoints
  // so that the vector is always ordered according to location.
  DiagStates.push_back(*Pos->State);
  DiagState *NewState = &DiagStates.back();
  GetCurDiagState()->setMappingInfo(Diag, MappingInfo);
  DiagStatePoints.insert(Pos+1, DiagStatePoint(NewState,
                                               Loc));
}

bool DiagnosticsEngine::EmitCurrentDiagnostic(bool Force) {
  assert(getClient() && "DiagnosticClient not set!");

  bool Emitted;
  if (Force) {
    Diagnostic Info(this);

    // Figure out the diagnostic level of this message.
    DiagnosticIDs::Level DiagLevel
      = Diags->getDiagnosticLevel(Info.getID(), Info.getLocation(), *this);

    Emitted = (DiagLevel != DiagnosticIDs::Ignored);
    if (Emitted) {
      // Emit the diagnostic regardless of suppression level.
      Diags->EmitDiag(*this, DiagLevel);
    }
  } else {
    // Process the diagnostic, sending the accumulated information to the
    // DiagnosticConsumer.
    Emitted = ProcessDiag();
  }

  // Clear out the current diagnostic object.
  unsigned DiagID = CurDiagID;
  Clear();

  // If there was a delayed diagnostic, emit it now.
  if (!Force && DelayedDiagID && DelayedDiagID != DiagID)
    ReportDelayed();


  return Emitted;
}

/// ReportError - Emit an error at the location \arg L, with the message \arg
/// Msg.
///
/// \return The return value is always true, as an idiomatic convenience to
/// clients.
bool DiagnosticsEngine::ReportError(SourceLocation L, const llvm::Twine &Msg) {
  Client->HandleDiagnostic(Error, L, Msg);
  return true;
}

/// ReportWarning - Emit a warning at the location \arg L, with the message \arg
/// Msg.
///
/// \return The return value is always true, as an idiomatic convenience to
/// clients.
bool DiagnosticsEngine::ReportWarning(SourceLocation L, const llvm::Twine &Msg) {
  Client->HandleDiagnostic(Warning, L, Msg);
  return true;
}

/// ReportNote - Emit a warning at the location \arg L, with the message \arg
/// Msg.
///
/// \return The return value is always true, as an idiomatic convenience to
/// clients.
bool DiagnosticsEngine::ReportNote(SourceLocation L, const llvm::Twine &Msg) {
  Client->HandleDiagnostic(Note, L, Msg);
  return true;
}

DiagnosticClient::~DiagnosticClient() {}

void DiagnosticClient::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
                                        SourceLocation,
                                        const llvm::Twine &,
                                        llvm::ArrayRef<SourceRange>,
                                        llvm::ArrayRef<FixItHint>) {
  if (!IncludeInDiagnosticCounts())
    return;

  if (DiagLevel == DiagnosticsEngine::Warning)
    ++NumWarnings;
  else if (DiagLevel >= DiagnosticsEngine::Error)
    ++NumErrors;
}

static inline bool isDigit(char c) {
  return c >= '0' && c <= '9';
}
static inline bool isPunctuation(char c) {
  return c == '.' || c == ',' || c == ';' || c == ':' || c == '-' || c == '!' || c == '?';
}


/// ModifierIs - Return true if the specified modifier matches specified string.
template <std::size_t StrLen>
static bool ModifierIs(const char *Modifier, unsigned ModifierLen,
                       const char (&Str)[StrLen]) {
  return StrLen-1 == ModifierLen && !memcmp(Modifier, Str, StrLen-1);
}

/// ScanForward - Scans forward, looking for the given character, skipping
/// nested clauses and escaped characters.
static const char *ScanFormat(const char *I, const char *E, char Target) {
  unsigned Depth = 0;

  for ( ; I != E; ++I) {
    if (Depth == 0 && *I == Target) return I;
    if (Depth != 0 && *I == '}') Depth--;

    if (*I == '%') {
      I++;
      if (I == E) break;

      // Escaped characters get implicitly skipped here.

      // Format specifier.
      if (!isDigit(*I) && !isPunctuation(*I)) {
        for (I++; I != E && !isDigit(*I) && *I != '{'; I++) ;
        if (I == E) break;
        if (*I == '{')
          Depth++;
      }
    }
  }
  return E;
}

using llvm::SmallVectorImpl;
using llvm::SmallVector;

/// HandleSelectModifier - Handle the integer 'select' modifier.  This is used
/// like this:  %select{foo|bar|baz}2.  This means that the integer argument
/// "%2" has a value from 0-2.  If the value is 0, the diagnostic prints 'foo'.
/// If the value is 1, it prints 'bar'.  If it has the value 2, it prints 'baz'.
/// This is very useful for certain classes of variant diagnostics.
static void HandleSelectModifier(const Diagnostic &DInfo, unsigned ValNo,
                                 const char *Argument, unsigned ArgumentLen,
                                 SmallVectorImpl<char> &OutStr) {
  const char *ArgumentEnd = Argument+ArgumentLen;

  // Skip over 'ValNo' |'s.
  while (ValNo) {
    const char *NextVal = ScanFormat(Argument, ArgumentEnd, '|');
    assert(NextVal != ArgumentEnd && "Value for integer select modifier was"
           " larger than the number of options in the diagnostic string!");
    Argument = NextVal+1;  // Skip this string.
    --ValNo;
  }

  // Get the end of the value.  This is either the } or the |.
  const char *EndPtr = ScanFormat(Argument, ArgumentEnd, '|');

  // Recursively format the result of the select clause into the output string.
  DInfo.FormatDiagnostic(Argument, EndPtr, OutStr);
}

/// HandleIntegerSModifier - Handle the integer 's' modifier.  This adds the
/// letter 's' to the string if the value is not 1.  This is used in cases like
/// this:  "you idiot, you have %4 parameter%s4!".
static void HandleIntegerSModifier(unsigned ValNo,
                                   SmallVectorImpl<char> &OutStr) {
  if (ValNo != 1)
    OutStr.push_back('s');
}

/// HandleOrdinalModifier - Handle the integer 'ord' modifier.  This
/// prints the ordinal form of the given integer, with 1 corresponding
/// to the first ordinal.  Currently this is hard-coded to use the
/// English form.
static void HandleOrdinalModifier(unsigned ValNo,
                                  SmallVectorImpl<char> &OutStr) {
  assert(ValNo != 0 && "ValNo must be strictly positive!");

  llvm::raw_svector_ostream Out(OutStr);

  // We could use text forms for the first N ordinals, but the numeric
  // forms are actually nicer in diagnostics because they stand out.
  Out << ValNo << llvm::getOrdinalSuffix(ValNo);
}


/// PluralNumber - Parse an unsigned integer and advance Start.
static unsigned PluralNumber(const char *&Start, const char *End) {
  // Programming 101: Parse a decimal number :-)
  unsigned Val = 0;
  while (Start != End && *Start >= '0' && *Start <= '9') {
    Val *= 10;
    Val += *Start - '0';
    ++Start;
  }
  return Val;
}

/// TestPluralRange - Test if Val is in the parsed range. Modifies Start.
static bool TestPluralRange(unsigned Val, const char *&Start, const char *End) {
  if (*Start != '[') {
    unsigned Ref = PluralNumber(Start, End);
    return Ref == Val;
  }

  ++Start;
  unsigned Low = PluralNumber(Start, End);
  assert(*Start == ',' && "Bad plural expression syntax: expected ,");
  ++Start;
  unsigned High = PluralNumber(Start, End);
  assert(*Start == ']' && "Bad plural expression syntax: expected )");
  ++Start;
  return Low <= Val && Val <= High;
}

/// EvalPluralExpr - Actual expression evaluator for HandlePluralModifier.
static bool EvalPluralExpr(unsigned ValNo, const char *Start, const char *End) {
  // Empty condition?
  if (*Start == ':')
    return true;

  while (1) {
    char C = *Start;
    if (C == '%') {
      // Modulo expression
      ++Start;
      unsigned Arg = PluralNumber(Start, End);
      assert(*Start == '=' && "Bad plural expression syntax: expected =");
      ++Start;
      unsigned ValMod = ValNo % Arg;
      if (TestPluralRange(ValMod, Start, End))
        return true;
    } else {
      assert((C == '[' || (C >= '0' && C <= '9')) &&
             "Bad plural expression syntax: unexpected character");
      // Range expression
      if (TestPluralRange(ValNo, Start, End))
        return true;
    }

    // Scan for next or-expr part.
    Start = std::find(Start, End, ',');
    if (Start == End)
      break;
    ++Start;
  }
  return false;
}

/// HandlePluralModifier - Handle the integer 'plural' modifier. This is used
/// for complex plural forms, or in languages where all plurals are complex.
/// The syntax is: %plural{cond1:form1|cond2:form2|:form3}, where condn are
/// conditions that are tested in order, the form corresponding to the first
/// that applies being emitted. The empty condition is always true, making the
/// last form a default case.
/// Conditions are simple boolean expressions, where n is the number argument.
/// Here are the rules.
/// condition  := expression | empty
/// empty      :=                             -> always true
/// expression := numeric [',' expression]    -> logical or
/// numeric    := range                       -> true if n in range
///             | '%' number '=' range        -> true if n % number in range
/// range      := number
///             | '[' number ',' number ']'   -> ranges are inclusive both ends
///
/// Here are some examples from the GNU gettext manual written in this form:
/// English:
/// {1:form0|:form1}
/// Latvian:
/// {0:form2|%100=11,%10=0,%10=[2,9]:form1|:form0}
/// Gaeilge:
/// {1:form0|2:form1|:form2}
/// Romanian:
/// {1:form0|0,%100=[1,19]:form1|:form2}
/// Lithuanian:
/// {%10=0,%100=[10,19]:form2|%10=1:form0|:form1}
/// Russian (requires repeated form):
/// {%100=[11,14]:form2|%10=1:form0|%10=[2,4]:form1|:form2}
/// Slovak
/// {1:form0|[2,4]:form1|:form2}
/// Polish (requires repeated form):
/// {1:form0|%100=[10,20]:form2|%10=[2,4]:form1|:form2}
static void HandlePluralModifier(const Diagnostic &DInfo, unsigned ValNo,
                                 const char *Argument, unsigned ArgumentLen,
                                 SmallVectorImpl<char> &OutStr) {
  const char *ArgumentEnd = Argument + ArgumentLen;
  while (1) {
    assert(Argument < ArgumentEnd && "Plural expression didn't match.");
    const char *ExprEnd = Argument;
    while (*ExprEnd != ':') {
      assert(ExprEnd != ArgumentEnd && "Plural missing expression end");
      ++ExprEnd;
    }
    if (EvalPluralExpr(ValNo, Argument, ExprEnd)) {
      Argument = ExprEnd + 1;
      ExprEnd = ScanFormat(Argument, ArgumentEnd, '|');

      // Recursively format the result of the plural clause into the
      // output string.
      DInfo.FormatDiagnostic(Argument, ExprEnd, OutStr);
      return;
    }
    Argument = ScanFormat(Argument, ArgumentEnd - 1, '|') + 1;
  }
}

/// FormatDiagnostic - Format this diagnostic into a string, substituting the
/// formal arguments into the %0 slots.  The result is appended onto the Str
/// array.
void Diagnostic::
FormatDiagnostic(SmallVectorImpl<char> &OutStr) const {
  if (!StoredDiagMessage.empty()) {
    OutStr.append(StoredDiagMessage.begin(), StoredDiagMessage.end());
    return;
  }

  llvm::StringRef Diag =
    getDiags()->getDiagnosticIDs()->getDescription(getID());

  FormatDiagnostic(Diag.begin(), Diag.end(), OutStr);
}

void Diagnostic::
FormatDiagnostic(const char *DiagStr, const char *DiagEnd,
                 SmallVectorImpl<char> &OutStr) const {

  /// FormattedArgs - Keep track of all of the arguments formatted by
  /// ConvertArgToString and pass them into subsequent calls to
  /// ConvertArgToString, allowing the implementation to avoid redundancies in
  /// obvious cases.
  SmallVector<DiagnosticsEngine::ArgumentValue, 8> FormattedArgs;

  /// QualTypeVals - Pass a vector of arrays so that QualType names can be
  /// compared to see if more information is needed to be printed.
  SmallVector<intptr_t, 2> QualTypeVals;
  SmallVector<char, 64> Tree;

  for (unsigned i = 0, e = getNumArgs(); i < e; ++i)
    if (getArgKind(i) == DiagnosticsEngine::ak_qualtype)
      QualTypeVals.push_back(getRawArg(i));

  while (DiagStr != DiagEnd) {
    if (DiagStr[0] != '%') {
      // Append non-%0 substrings to Str if we have one.
      const char *StrEnd = std::find(DiagStr, DiagEnd, '%');
      OutStr.append(DiagStr, StrEnd);
      DiagStr = StrEnd;
      continue;
    } else if (isPunctuation(DiagStr[1])) {
      OutStr.push_back(DiagStr[1]);  // %% -> %.
      DiagStr += 2;
      continue;
    }

    // Skip the %.
    ++DiagStr;

    // This must be a placeholder for a diagnostic argument.  The format for a
    // placeholder is one of "%0", "%modifier0", or "%modifier{arguments}0".
    // The digit is a number from 0-9 indicating which argument this comes from.
    // The modifier is a string of digits from the set [-a-z]+, arguments is a
    // brace enclosed string.
    const char *Modifier = 0, *Argument = 0;
    unsigned ModifierLen = 0, ArgumentLen = 0;

    // Check to see if we have a modifier.  If so eat it.
    if (!isDigit(DiagStr[0])) {
      Modifier = DiagStr;
      while (DiagStr[0] == '-' ||
             (DiagStr[0] >= 'a' && DiagStr[0] <= 'z'))
        ++DiagStr;
      ModifierLen = DiagStr-Modifier;

      // If we have an argument, get it next.
      if (DiagStr[0] == '{') {
        ++DiagStr; // Skip {.
        Argument = DiagStr;

        DiagStr = ScanFormat(DiagStr, DiagEnd, '}');
        assert(DiagStr != DiagEnd && "Mismatched {}'s in diagnostic string!");
        ArgumentLen = DiagStr-Argument;
        ++DiagStr;  // Skip }.
      }
    }

    assert(isDigit(*DiagStr) && "Invalid format for argument in diagnostic");
    unsigned ArgNo = *DiagStr++ - '0';

    // Only used for type diffing.
    unsigned ArgNo2 = ArgNo;

    DiagnosticsEngine::ArgumentKind Kind = getArgKind(ArgNo);
    if (ModifierIs(Modifier, ModifierLen, "diff")) {
      assert(*DiagStr == ',' && isDigit(*(DiagStr + 1)) &&
             "Invalid format for diff modifier");
      ++DiagStr;  // Comma.
      ArgNo2 = *DiagStr++ - '0';
      DiagnosticsEngine::ArgumentKind Kind2 = getArgKind(ArgNo2);
      if (Kind == DiagnosticsEngine::ak_qualtype &&
          Kind2 == DiagnosticsEngine::ak_qualtype)
        Kind = DiagnosticsEngine::ak_qualtype_pair;
      else {
        // %diff only supports QualTypes.  For other kinds of arguments,
        // use the default printing.  For example, if the modifier is:
        //   "%diff{compare $ to $|other text}1,2"
        // treat it as:
        //   "compare %1 to %2"
        const char *Pipe = ScanFormat(Argument, Argument + ArgumentLen, '|');
        const char *FirstDollar = ScanFormat(Argument, Pipe, '$');
        const char *SecondDollar = ScanFormat(FirstDollar + 1, Pipe, '$');
        const char ArgStr1[] = { '%', static_cast<char>('0' + ArgNo) };
        const char ArgStr2[] = { '%', static_cast<char>('0' + ArgNo2) };
        FormatDiagnostic(Argument, FirstDollar, OutStr);
        FormatDiagnostic(ArgStr1, ArgStr1 + 2, OutStr);
        FormatDiagnostic(FirstDollar + 1, SecondDollar, OutStr);
        FormatDiagnostic(ArgStr2, ArgStr2 + 2, OutStr);
        FormatDiagnostic(SecondDollar + 1, Pipe, OutStr);
        continue;
      }
    }

    switch (Kind) {
    // ---- STRINGS ----
    case DiagnosticsEngine::ak_std_string: {
      const std::string &S = getArgStdStr(ArgNo);
      assert(ModifierLen == 0 && "No modifiers for strings yet");
      OutStr.append(S.begin(), S.end());
      break;
    }
    case DiagnosticsEngine::ak_c_string: {
      const char *S = getArgCStr(ArgNo);
      assert(ModifierLen == 0 && "No modifiers for strings yet");

      // Don't crash if get passed a null pointer by accident.
      if (!S)
        S = "(null)";

      OutStr.append(S, S + strlen(S));
      break;
    }
    // ---- INTEGERS ----
    case DiagnosticsEngine::ak_sint: {
      int Val = getArgSInt(ArgNo);

      if (ModifierIs(Modifier, ModifierLen, "select")) {
        HandleSelectModifier(*this, (unsigned)Val, Argument, ArgumentLen,
                             OutStr);
      } else if (ModifierIs(Modifier, ModifierLen, "s")) {
        HandleIntegerSModifier(Val, OutStr);
      } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
        HandlePluralModifier(*this, (unsigned)Val, Argument, ArgumentLen,
                             OutStr);
      } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
        HandleOrdinalModifier((unsigned)Val, OutStr);
      } else {
        assert(ModifierLen == 0 && "Unknown integer modifier");
        llvm::raw_svector_ostream(OutStr) << Val;
      }
      break;
    }
    case DiagnosticsEngine::ak_uint: {
      unsigned Val = getArgUInt(ArgNo);

      if (ModifierIs(Modifier, ModifierLen, "select")) {
        HandleSelectModifier(*this, Val, Argument, ArgumentLen, OutStr);
      } else if (ModifierIs(Modifier, ModifierLen, "s")) {
        HandleIntegerSModifier(Val, OutStr);
      } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
        HandlePluralModifier(*this, (unsigned)Val, Argument, ArgumentLen,
                             OutStr);
      } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
        HandleOrdinalModifier(Val, OutStr);
      } else {
        assert(ModifierLen == 0 && "Unknown integer modifier");
        llvm::raw_svector_ostream(OutStr) << Val;
      }
      break;
    }
    // ---- NAMES and TYPES ----
    case DiagnosticsEngine::ak_identifierinfo: {
      const IdentifierInfo *II = getArgIdentifier(ArgNo);
      assert(ModifierLen == 0 && "No modifiers for strings yet");

      // Don't crash if get passed a null pointer by accident.
      if (!II) {
        const char *S = "(null)";
        OutStr.append(S, S + strlen(S));
        continue;
      }

      llvm::raw_svector_ostream(OutStr) << '\'' << II->getName() << '\'';
      break;
    }
    case DiagnosticsEngine::ak_qualtype: {
      QualType T = QualType::getFromOpaquePtr((void*)getRawArg(ArgNo));
      llvm::raw_svector_ostream Stream(OutStr);
      Stream << '\'';
      T.print(Stream);
      Stream << '\'';
      break;
    }
    }

    // Remember this argument info for subsequent formatting operations.  Turn
    // std::strings into a null terminated string to make it be the same case as
    // all the other ones.
    if (Kind == DiagnosticsEngine::ak_qualtype_pair)
      continue;
    else if (Kind != DiagnosticsEngine::ak_std_string)
      FormattedArgs.push_back(std::make_pair(Kind, getRawArg(ArgNo)));
    else
      FormattedArgs.push_back(std::make_pair(DiagnosticsEngine::ak_c_string,
                                        (intptr_t)getArgStdStr(ArgNo).c_str()));

  }

  // Append the type tree to the end of the diagnostics.
  OutStr.append(Tree.begin(), Tree.end());
}


} //namespace flang