//===--- StmtCXX.cpp - Classes for representing C++ statements ------------===//

//

// 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 the subclesses of Stmt class declared in StmtCXX.h

//

//===----------------------------------------------------------------------===//

#include "clang/AST/StmtCXX.h"

#include "clang/AST/ASTContext.h"

using namespace clang;

QualType CXXCatchStmt::getCaughtType() const {

  if (ExceptionDecl)

    return ExceptionDecl->getType();

  return QualType();

}

CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, SourceLocation tryLoc,

                               CompoundStmt *tryBlock,

                               ArrayRef<Stmt *> handlers) {

  const size_t Size = totalSizeToAlloc<Stmt *>(handlers.size() + 1);

  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));

  return new (Mem) CXXTryStmt(tryLoc, tryBlock, handlers);

}

CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, EmptyShell Empty,

                               unsigned numHandlers) {

  const size_t Size = totalSizeToAlloc<Stmt *>(numHandlers + 1);

  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));

  return new (Mem) CXXTryStmt(Empty, numHandlers);

}

CXXTryStmt::CXXTryStmt(SourceLocation tryLoc, CompoundStmt *tryBlock,

                       ArrayRef<Stmt *> handlers)

    : Stmt(CXXTryStmtClass), TryLoc(tryLoc), NumHandlers(handlers.size()) {

  Stmt **Stmts = getStmts();

  Stmts[0] = tryBlock;

  std::copy(handlers.begin(), handlers.end(), Stmts + 1);

}

CXXForRangeStmt::CXXForRangeStmt(Stmt *Init, DeclStmt *Range,

                                 DeclStmt *BeginStmt, DeclStmt *EndStmt,

                                 Expr *Cond, Expr *Inc, DeclStmt *LoopVar,

                                 Stmt *Body, SourceLocation FL,

                                 SourceLocation CAL, SourceLocation CL,

                                 SourceLocation RPL)

    : Stmt(CXXForRangeStmtClass), ForLoc(FL), CoawaitLoc(CAL), ColonLoc(CL),

      RParenLoc(RPL) {

  SubExprs[INIT] = Init;

  SubExprs[RANGE] = Range;

  SubExprs[BEGINSTMT] = BeginStmt;

  SubExprs[ENDSTMT] = EndStmt;

  SubExprs[COND] = Cond;

  SubExprs[INC] = Inc;

  SubExprs[LOOPVAR] = LoopVar;

  SubExprs[BODY] = Body;

}

Expr *CXXForRangeStmt::getRangeInit() {

  DeclStmt *RangeStmt = getRangeStmt();

  VarDecl *RangeDecl = dyn_cast_or_null<VarDecl>(RangeStmt->getSingleDecl());

  assert(RangeDecl && "for-range should have a single var decl");

  return RangeDecl->getInit();

}

const Expr *CXXForRangeStmt::getRangeInit() const {

  return const_cast<CXXForRangeStmt *>(this)->getRangeInit();

}

VarDecl *CXXForRangeStmt::getLoopVariable() {

  Decl *LV = cast<DeclStmt>(getLoopVarStmt())->getSingleDecl();

  assert(LV && "No loop variable in CXXForRangeStmt");

  return cast<VarDecl>(LV);

}

const VarDecl *CXXForRangeStmt::getLoopVariable() const {

  return const_cast<CXXForRangeStmt *>(this)->getLoopVariable();

}

CoroutineBodyStmt *CoroutineBodyStmt::Create(

    const ASTContext &C, CoroutineBodyStmt::CtorArgs const &Args) {

  std::size_t Size = totalSizeToAlloc<Stmt *>(

      CoroutineBodyStmt::FirstParamMove + Args.ParamMoves.size());

  void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));

  return new (Mem) CoroutineBodyStmt(Args);

}

CoroutineBodyStmt *CoroutineBodyStmt::Create(const ASTContext &C, EmptyShell,

                                             unsigned NumParams) {

  std::size_t Size = totalSizeToAlloc<Stmt *>(

      CoroutineBodyStmt::FirstParamMove + NumParams);

  void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));

  auto *Result = new (Mem) CoroutineBodyStmt(CtorArgs());

  Result->NumParams = NumParams;

  auto *ParamBegin = Result->getStoredStmts() + SubStmt::FirstParamMove;

  std::uninitialized_fill(ParamBegin, ParamBegin + NumParams,

                          static_cast<Stmt *>(nullptr));

  return Result;

}

CoroutineBodyStmt::CoroutineBodyStmt(CoroutineBodyStmt::CtorArgs const &Args)

    : Stmt(CoroutineBodyStmtClass), NumParams(Args.ParamMoves.size()) {

  Stmt **SubStmts = getStoredStmts();

  SubStmts[CoroutineBodyStmt::Body] = Args.Body;

  SubStmts[CoroutineBodyStmt::Promise] = Args.Promise;

  SubStmts[CoroutineBodyStmt::InitSuspend] = Args.InitialSuspend;

  SubStmts[CoroutineBodyStmt::FinalSuspend] = Args.FinalSuspend;

  SubStmts[CoroutineBodyStmt::OnException] = Args.OnException;

  SubStmts[CoroutineBodyStmt::OnFallthrough] = Args.OnFallthrough;

  SubStmts[CoroutineBodyStmt::Allocate] = Args.Allocate;

  SubStmts[CoroutineBodyStmt::Deallocate] = Args.Deallocate;

  SubStmts[CoroutineBodyStmt::ResultDecl] = Args.ResultDecl;

  SubStmts[CoroutineBodyStmt::ReturnValue] = Args.ReturnValue;

  SubStmts[CoroutineBodyStmt::ReturnStmt] = Args.ReturnStmt;

  SubStmts[CoroutineBodyStmt::ReturnStmtOnAllocFailure] =

      Args.ReturnStmtOnAllocFailure;

  std::copy(Args.ParamMoves.begin(), Args.ParamMoves.end(),

            const_cast<Stmt **>(getParamMoves().data()));

}