1 files changed, 0 insertions, 550 deletions

diff --git a/contrib/llvm/tools/clang/lib/Parse/ParseInit.cpp b/contrib/llvm/tools/clang/lib/Parse/ParseInit.cpp
deleted file mode 100644
index 7a455484b902..000000000000
--- a/contrib/llvm/tools/clang/lib/Parse/ParseInit.cpp
+++ /dev/null
@@ -1,550 +0,0 @@
-//===--- ParseInit.cpp - Initializer Parsing ------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-//
-// This file implements initializer parsing as specified by C99 6.7.8.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Parse/ParseDiagnostic.h"
-#include "clang/Parse/Parser.h"
-#include "clang/Parse/RAIIObjectsForParser.h"
-#include "clang/Sema/Designator.h"
-#include "clang/Sema/Scope.h"
-#include "llvm/ADT/SmallString.h"
-using namespace clang;
-
-
-/// MayBeDesignationStart - Return true if the current token might be the start
-/// of a designator.  If we can tell it is impossible that it is a designator,
-/// return false.
-bool Parser::MayBeDesignationStart() {
-  switch (Tok.getKind()) {
-  default:
-    return false;
-
-  case tok::period:      // designator: '.' identifier
-    return true;
-
-  case tok::l_square: {  // designator: array-designator
-    if (!PP.getLangOpts().CPlusPlus11)
-      return true;
-
-    // C++11 lambda expressions and C99 designators can be ambiguous all the
-    // way through the closing ']' and to the next character. Handle the easy
-    // cases here, and fall back to tentative parsing if those fail.
-    switch (PP.LookAhead(0).getKind()) {
-    case tok::equal:
-    case tok::r_square:
-      // Definitely starts a lambda expression.
-      return false;
-
-    case tok::amp:
-    case tok::kw_this:
-    case tok::identifier:
-      // We have to do additional analysis, because these could be the
-      // start of a constant expression or a lambda capture list.
-      break;
-
-    default:
-      // Anything not mentioned above cannot occur following a '[' in a
-      // lambda expression.
-      return true;
-    }
-
-    // Handle the complicated case below.
-    break;
-  }
-  case tok::identifier:  // designation: identifier ':'
-    return PP.LookAhead(0).is(tok::colon);
-  }
-
-  // Parse up to (at most) the token after the closing ']' to determine
-  // whether this is a C99 designator or a lambda.
-  RevertingTentativeParsingAction Tentative(*this);
-
-  LambdaIntroducer Intro;
-  LambdaIntroducerTentativeParse ParseResult;
-  if (ParseLambdaIntroducer(Intro, &ParseResult)) {
-    // Hit and diagnosed an error in a lambda.
-    // FIXME: Tell the caller this happened so they can recover.
-    return true;
-  }
-
-  switch (ParseResult) {
-  case LambdaIntroducerTentativeParse::Success:
-  case LambdaIntroducerTentativeParse::Incomplete:
-    // Might be a lambda-expression. Keep looking.
-    // FIXME: If our tentative parse was not incomplete, parse the lambda from
-    // here rather than throwing away then reparsing the LambdaIntroducer.
-    break;
-
-  case LambdaIntroducerTentativeParse::MessageSend:
-  case LambdaIntroducerTentativeParse::Invalid:
-    // Can't be a lambda-expression. Treat it as a designator.
-    // FIXME: Should we disambiguate against a message-send?
-    return true;
-  }
-
-  // Once we hit the closing square bracket, we look at the next
-  // token. If it's an '=', this is a designator. Otherwise, it's a
-  // lambda expression. This decision favors lambdas over the older
-  // GNU designator syntax, which allows one to omit the '=', but is
-  // consistent with GCC.
-  return Tok.is(tok::equal);
-}
-
-static void CheckArrayDesignatorSyntax(Parser &P, SourceLocation Loc,
-                                       Designation &Desig) {
-  // If we have exactly one array designator, this used the GNU
-  // 'designation: array-designator' extension, otherwise there should be no
-  // designators at all!
-  if (Desig.getNumDesignators() == 1 &&
-      (Desig.getDesignator(0).isArrayDesignator() ||
-       Desig.getDesignator(0).isArrayRangeDesignator()))
-    P.Diag(Loc, diag::ext_gnu_missing_equal_designator);
-  else if (Desig.getNumDesignators() > 0)
-    P.Diag(Loc, diag::err_expected_equal_designator);
-}
-
-/// ParseInitializerWithPotentialDesignator - Parse the 'initializer' production
-/// checking to see if the token stream starts with a designator.
-///
-///       designation:
-///         designator-list '='
-/// [GNU]   array-designator
-/// [GNU]   identifier ':'
-///
-///       designator-list:
-///         designator
-///         designator-list designator
-///
-///       designator:
-///         array-designator
-///         '.' identifier
-///
-///       array-designator:
-///         '[' constant-expression ']'
-/// [GNU]   '[' constant-expression '...' constant-expression ']'
-///
-/// NOTE: [OBC] allows '[ objc-receiver objc-message-args ]' as an
-/// initializer (because it is an expression).  We need to consider this case
-/// when parsing array designators.
-///
-ExprResult Parser::ParseInitializerWithPotentialDesignator() {
-
-  // If this is the old-style GNU extension:
-  //   designation ::= identifier ':'
-  // Handle it as a field designator.  Otherwise, this must be the start of a
-  // normal expression.
-  if (Tok.is(tok::identifier)) {
-    const IdentifierInfo *FieldName = Tok.getIdentifierInfo();
-
-    SmallString<256> NewSyntax;
-    llvm::raw_svector_ostream(NewSyntax) << '.' << FieldName->getName()
-                                         << " = ";
-
-    SourceLocation NameLoc = ConsumeToken(); // Eat the identifier.
-
-    assert(Tok.is(tok::colon) && "MayBeDesignationStart not working properly!");
-    SourceLocation ColonLoc = ConsumeToken();
-
-    Diag(NameLoc, diag::ext_gnu_old_style_field_designator)
-      << FixItHint::CreateReplacement(SourceRange(NameLoc, ColonLoc),
-                                      NewSyntax);
-
-    Designation D;
-    D.AddDesignator(Designator::getField(FieldName, SourceLocation(), NameLoc));
-    return Actions.ActOnDesignatedInitializer(D, ColonLoc, true,
-                                              ParseInitializer());
-  }
-
-  // Desig - This is initialized when we see our first designator.  We may have
-  // an objc message send with no designator, so we don't want to create this
-  // eagerly.
-  Designation Desig;
-
-  // Parse each designator in the designator list until we find an initializer.
-  while (Tok.is(tok::period) || Tok.is(tok::l_square)) {
-    if (Tok.is(tok::period)) {
-      // designator: '.' identifier
-      SourceLocation DotLoc = ConsumeToken();
-
-      if (Tok.isNot(tok::identifier)) {
-        Diag(Tok.getLocation(), diag::err_expected_field_designator);
-        return ExprError();
-      }
-
-      Desig.AddDesignator(Designator::getField(Tok.getIdentifierInfo(), DotLoc,
-                                               Tok.getLocation()));
-      ConsumeToken(); // Eat the identifier.
-      continue;
-    }
-
-    // We must have either an array designator now or an objc message send.
-    assert(Tok.is(tok::l_square) && "Unexpected token!");
-
-    // Handle the two forms of array designator:
-    //   array-designator: '[' constant-expression ']'
-    //   array-designator: '[' constant-expression '...' constant-expression ']'
-    //
-    // Also, we have to handle the case where the expression after the
-    // designator an an objc message send: '[' objc-message-expr ']'.
-    // Interesting cases are:
-    //   [foo bar]         -> objc message send
-    //   [foo]             -> array designator
-    //   [foo ... bar]     -> array designator
-    //   [4][foo bar]      -> obsolete GNU designation with objc message send.
-    //
-    // We do not need to check for an expression starting with [[ here. If it
-    // contains an Objective-C message send, then it is not an ill-formed
-    // attribute. If it is a lambda-expression within an array-designator, then
-    // it will be rejected because a constant-expression cannot begin with a
-    // lambda-expression.
-    InMessageExpressionRAIIObject InMessage(*this, true);
-
-    BalancedDelimiterTracker T(*this, tok::l_square);
-    T.consumeOpen();
-    SourceLocation StartLoc = T.getOpenLocation();
-
-    ExprResult Idx;
-
-    // If Objective-C is enabled and this is a typename (class message
-    // send) or send to 'super', parse this as a message send
-    // expression.  We handle C++ and C separately, since C++ requires
-    // much more complicated parsing.
-    if  (getLangOpts().ObjC && getLangOpts().CPlusPlus) {
-      // Send to 'super'.
-      if (Tok.is(tok::identifier) && Tok.getIdentifierInfo() == Ident_super &&
-          NextToken().isNot(tok::period) &&
-          getCurScope()->isInObjcMethodScope()) {
-        CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
-        return ParseAssignmentExprWithObjCMessageExprStart(
-            StartLoc, ConsumeToken(), nullptr, nullptr);
-      }
-
-      // Parse the receiver, which is either a type or an expression.
-      bool IsExpr;
-      void *TypeOrExpr;
-      if (ParseObjCXXMessageReceiver(IsExpr, TypeOrExpr)) {
-        SkipUntil(tok::r_square, StopAtSemi);
-        return ExprError();
-      }
-
-      // If the receiver was a type, we have a class message; parse
-      // the rest of it.
-      if (!IsExpr) {
-        CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
-        return ParseAssignmentExprWithObjCMessageExprStart(StartLoc,
-                                                           SourceLocation(),
-                                   ParsedType::getFromOpaquePtr(TypeOrExpr),
-                                                           nullptr);
-      }
-
-      // If the receiver was an expression, we still don't know
-      // whether we have a message send or an array designator; just
-      // adopt the expression for further analysis below.
-      // FIXME: potentially-potentially evaluated expression above?
-      Idx = ExprResult(static_cast<Expr*>(TypeOrExpr));
-    } else if (getLangOpts().ObjC && Tok.is(tok::identifier)) {
-      IdentifierInfo *II = Tok.getIdentifierInfo();
-      SourceLocation IILoc = Tok.getLocation();
-      ParsedType ReceiverType;
-      // Three cases. This is a message send to a type: [type foo]
-      // This is a message send to super:  [super foo]
-      // This is a message sent to an expr:  [super.bar foo]
-      switch (Actions.getObjCMessageKind(
-          getCurScope(), II, IILoc, II == Ident_super,
-          NextToken().is(tok::period), ReceiverType)) {
-      case Sema::ObjCSuperMessage:
-        CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
-        return ParseAssignmentExprWithObjCMessageExprStart(
-            StartLoc, ConsumeToken(), nullptr, nullptr);
-
-      case Sema::ObjCClassMessage:
-        CheckArrayDesignatorSyntax(*this, StartLoc, Desig);
-        ConsumeToken(); // the identifier
-        if (!ReceiverType) {
-          SkipUntil(tok::r_square, StopAtSemi);
-          return ExprError();
-        }
-
-        // Parse type arguments and protocol qualifiers.
-        if (Tok.is(tok::less)) {
-          SourceLocation NewEndLoc;
-          TypeResult NewReceiverType
-            = parseObjCTypeArgsAndProtocolQualifiers(IILoc, ReceiverType,
-                                                     /*consumeLastToken=*/true,
-                                                     NewEndLoc);
-          if (!NewReceiverType.isUsable()) {
-            SkipUntil(tok::r_square, StopAtSemi);
-            return ExprError();
-          }
-
-          ReceiverType = NewReceiverType.get();
-        }
-
-        return ParseAssignmentExprWithObjCMessageExprStart(StartLoc,
-                                                           SourceLocation(),
-                                                           ReceiverType,
-                                                           nullptr);
-
-      case Sema::ObjCInstanceMessage:
-        // Fall through; we'll just parse the expression and
-        // (possibly) treat this like an Objective-C message send
-        // later.
-        break;
-      }
-    }
-
-    // Parse the index expression, if we haven't already gotten one
-    // above (which can only happen in Objective-C++).
-    // Note that we parse this as an assignment expression, not a constant
-    // expression (allowing *=, =, etc) to handle the objc case.  Sema needs
-    // to validate that the expression is a constant.
-    // FIXME: We also need to tell Sema that we're in a
-    // potentially-potentially evaluated context.
-    if (!Idx.get()) {
-      Idx = ParseAssignmentExpression();
-      if (Idx.isInvalid()) {
-        SkipUntil(tok::r_square, StopAtSemi);
-        return Idx;
-      }
-    }
-
-    // Given an expression, we could either have a designator (if the next
-    // tokens are '...' or ']' or an objc message send.  If this is an objc
-    // message send, handle it now.  An objc-message send is the start of
-    // an assignment-expression production.
-    if (getLangOpts().ObjC && Tok.isNot(tok::ellipsis) &&
-        Tok.isNot(tok::r_square)) {
-      CheckArrayDesignatorSyntax(*this, Tok.getLocation(), Desig);
-      return ParseAssignmentExprWithObjCMessageExprStart(
-          StartLoc, SourceLocation(), nullptr, Idx.get());
-    }
-
-    // If this is a normal array designator, remember it.
-    if (Tok.isNot(tok::ellipsis)) {
-      Desig.AddDesignator(Designator::getArray(Idx.get(), StartLoc));
-    } else {
-      // Handle the gnu array range extension.
-      Diag(Tok, diag::ext_gnu_array_range);
-      SourceLocation EllipsisLoc = ConsumeToken();
-
-      ExprResult RHS(ParseConstantExpression());
-      if (RHS.isInvalid()) {
-        SkipUntil(tok::r_square, StopAtSemi);
-        return RHS;
-      }
-      Desig.AddDesignator(Designator::getArrayRange(Idx.get(),
-                                                    RHS.get(),
-                                                    StartLoc, EllipsisLoc));
-    }
-
-    T.consumeClose();
-    Desig.getDesignator(Desig.getNumDesignators() - 1).setRBracketLoc(
-                                                        T.getCloseLocation());
-  }
-
-  // Okay, we're done with the designator sequence.  We know that there must be
-  // at least one designator, because the only case we can get into this method
-  // without a designator is when we have an objc message send.  That case is
-  // handled and returned from above.
-  assert(!Desig.empty() && "Designator is empty?");
-
-  // Handle a normal designator sequence end, which is an equal.
-  if (Tok.is(tok::equal)) {
-    SourceLocation EqualLoc = ConsumeToken();
-    return Actions.ActOnDesignatedInitializer(Desig, EqualLoc, false,
-                                              ParseInitializer());
-  }
-
-  // We read some number of designators and found something that isn't an = or
-  // an initializer.  If we have exactly one array designator, this
-  // is the GNU 'designation: array-designator' extension.  Otherwise, it is a
-  // parse error.
-  if (Desig.getNumDesignators() == 1 &&
-      (Desig.getDesignator(0).isArrayDesignator() ||
-       Desig.getDesignator(0).isArrayRangeDesignator())) {
-    Diag(Tok, diag::ext_gnu_missing_equal_designator)
-      << FixItHint::CreateInsertion(Tok.getLocation(), "= ");
-    return Actions.ActOnDesignatedInitializer(Desig, Tok.getLocation(),
-                                              true, ParseInitializer());
-  }
-
-  Diag(Tok, diag::err_expected_equal_designator);
-  return ExprError();
-}
-
-
-/// ParseBraceInitializer - Called when parsing an initializer that has a
-/// leading open brace.
-///
-///       initializer: [C99 6.7.8]
-///         '{' initializer-list '}'
-///         '{' initializer-list ',' '}'
-/// [GNU]   '{' '}'
-///
-///       initializer-list:
-///         designation[opt] initializer ...[opt]
-///         initializer-list ',' designation[opt] initializer ...[opt]
-///
-ExprResult Parser::ParseBraceInitializer() {
-  InMessageExpressionRAIIObject InMessage(*this, false);
-
-  BalancedDelimiterTracker T(*this, tok::l_brace);
-  T.consumeOpen();
-  SourceLocation LBraceLoc = T.getOpenLocation();
-
-  /// InitExprs - This is the actual list of expressions contained in the
-  /// initializer.
-  ExprVector InitExprs;
-
-  if (Tok.is(tok::r_brace)) {
-    // Empty initializers are a C++ feature and a GNU extension to C.
-    if (!getLangOpts().CPlusPlus)
-      Diag(LBraceLoc, diag::ext_gnu_empty_initializer);
-    // Match the '}'.
-    return Actions.ActOnInitList(LBraceLoc, None, ConsumeBrace());
-  }
-
-  // Enter an appropriate expression evaluation context for an initializer list.
-  EnterExpressionEvaluationContext EnterContext(
-      Actions, EnterExpressionEvaluationContext::InitList);
-
-  bool InitExprsOk = true;
-
-  while (1) {
-    // Handle Microsoft __if_exists/if_not_exists if necessary.
-    if (getLangOpts().MicrosoftExt && (Tok.is(tok::kw___if_exists) ||
-        Tok.is(tok::kw___if_not_exists))) {
-      if (ParseMicrosoftIfExistsBraceInitializer(InitExprs, InitExprsOk)) {
-        if (Tok.isNot(tok::comma)) break;
-        ConsumeToken();
-      }
-      if (Tok.is(tok::r_brace)) break;
-      continue;
-    }
-
-    // Parse: designation[opt] initializer
-
-    // If we know that this cannot be a designation, just parse the nested
-    // initializer directly.
-    ExprResult SubElt;
-    if (MayBeDesignationStart())
-      SubElt = ParseInitializerWithPotentialDesignator();
-    else
-      SubElt = ParseInitializer();
-
-    if (Tok.is(tok::ellipsis))
-      SubElt = Actions.ActOnPackExpansion(SubElt.get(), ConsumeToken());
-
-    SubElt = Actions.CorrectDelayedTyposInExpr(SubElt.get());
-
-    // If we couldn't parse the subelement, bail out.
-    if (SubElt.isUsable()) {
-      InitExprs.push_back(SubElt.get());
-    } else {
-      InitExprsOk = false;
-
-      // We have two ways to try to recover from this error: if the code looks
-      // grammatically ok (i.e. we have a comma coming up) try to continue
-      // parsing the rest of the initializer.  This allows us to emit
-      // diagnostics for later elements that we find.  If we don't see a comma,
-      // assume there is a parse error, and just skip to recover.
-      // FIXME: This comment doesn't sound right. If there is a r_brace
-      // immediately, it can't be an error, since there is no other way of
-      // leaving this loop except through this if.
-      if (Tok.isNot(tok::comma)) {
-        SkipUntil(tok::r_brace, StopBeforeMatch);
-        break;
-      }
-    }
-
-    // If we don't have a comma continued list, we're done.
-    if (Tok.isNot(tok::comma)) break;
-
-    // TODO: save comma locations if some client cares.
-    ConsumeToken();
-
-    // Handle trailing comma.
-    if (Tok.is(tok::r_brace)) break;
-  }
-
-  bool closed = !T.consumeClose();
-
-  if (InitExprsOk && closed)
-    return Actions.ActOnInitList(LBraceLoc, InitExprs,
-                                 T.getCloseLocation());
-
-  return ExprError(); // an error occurred.
-}
-
-
-// Return true if a comma (or closing brace) is necessary after the
-// __if_exists/if_not_exists statement.
-bool Parser::ParseMicrosoftIfExistsBraceInitializer(ExprVector &InitExprs,
-                                                    bool &InitExprsOk) {
-  bool trailingComma = false;
-  IfExistsCondition Result;
-  if (ParseMicrosoftIfExistsCondition(Result))
-    return false;
-
-  BalancedDelimiterTracker Braces(*this, tok::l_brace);
-  if (Braces.consumeOpen()) {
-    Diag(Tok, diag::err_expected) << tok::l_brace;
-    return false;
-  }
-
-  switch (Result.Behavior) {
-  case IEB_Parse:
-    // Parse the declarations below.
-    break;
-
-  case IEB_Dependent:
-    Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists)
-      << Result.IsIfExists;
-    // Fall through to skip.
-    LLVM_FALLTHROUGH;
-
-  case IEB_Skip:
-    Braces.skipToEnd();
-    return false;
-  }
-
-  while (!isEofOrEom()) {
-    trailingComma = false;
-    // If we know that this cannot be a designation, just parse the nested
-    // initializer directly.
-    ExprResult SubElt;
-    if (MayBeDesignationStart())
-      SubElt = ParseInitializerWithPotentialDesignator();
-    else
-      SubElt = ParseInitializer();
-
-    if (Tok.is(tok::ellipsis))
-      SubElt = Actions.ActOnPackExpansion(SubElt.get(), ConsumeToken());
-
-    // If we couldn't parse the subelement, bail out.
-    if (!SubElt.isInvalid())
-      InitExprs.push_back(SubElt.get());
-    else
-      InitExprsOk = false;
-
-    if (Tok.is(tok::comma)) {
-      ConsumeToken();
-      trailingComma = true;
-    }
-
-    if (Tok.is(tok::r_brace))
-      break;
-  }
-
-  Braces.consumeClose();
-
-  return !trailingComma;
-}