1//===--- StmtCXX.cpp - Classes for representing C++ statements ------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the subclesses of Stmt class declared in StmtCXX.h
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/AST/StmtCXX.h"
14
15#include "clang/AST/ASTContext.h"
16
17using namespace clang;
18
19QualType CXXCatchStmt::getCaughtType() const {
20  if (ExceptionDecl)
21    return ExceptionDecl->getType();
22  return QualType();
23}
24
25CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, SourceLocation tryLoc,
26                               CompoundStmt *tryBlock,
27                               ArrayRef<Stmt *> handlers) {
28  const size_t Size = totalSizeToAlloc<Stmt *>(handlers.size() + 1);
29  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
30  return new (Mem) CXXTryStmt(tryLoc, tryBlock, handlers);
31}
32
33CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, EmptyShell Empty,
34                               unsigned numHandlers) {
35  const size_t Size = totalSizeToAlloc<Stmt *>(numHandlers + 1);
36  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
37  return new (Mem) CXXTryStmt(Empty, numHandlers);
38}
39
40CXXTryStmt::CXXTryStmt(SourceLocation tryLoc, CompoundStmt *tryBlock,
41                       ArrayRef<Stmt *> handlers)
42    : Stmt(CXXTryStmtClass), TryLoc(tryLoc), NumHandlers(handlers.size()) {
43  Stmt **Stmts = getStmts();
44  Stmts[0] = tryBlock;
45  std::copy(handlers.begin(), handlers.end(), Stmts + 1);
46}
47
48CXXForRangeStmt::CXXForRangeStmt(Stmt *Init, DeclStmt *Range,
49                                 DeclStmt *BeginStmt, DeclStmt *EndStmt,
50                                 Expr *Cond, Expr *Inc, DeclStmt *LoopVar,
51                                 Stmt *Body, SourceLocation FL,
52                                 SourceLocation CAL, SourceLocation CL,
53                                 SourceLocation RPL)
54    : Stmt(CXXForRangeStmtClass), ForLoc(FL), CoawaitLoc(CAL), ColonLoc(CL),
55      RParenLoc(RPL) {
56  SubExprs[INIT] = Init;
57  SubExprs[RANGE] = Range;
58  SubExprs[BEGINSTMT] = BeginStmt;
59  SubExprs[ENDSTMT] = EndStmt;
60  SubExprs[COND] = Cond;
61  SubExprs[INC] = Inc;
62  SubExprs[LOOPVAR] = LoopVar;
63  SubExprs[BODY] = Body;
64}
65
66Expr *CXXForRangeStmt::getRangeInit() {
67  DeclStmt *RangeStmt = getRangeStmt();
68  VarDecl *RangeDecl = dyn_cast_or_null<VarDecl>(RangeStmt->getSingleDecl());
69  assert(RangeDecl && "for-range should have a single var decl");
70  return RangeDecl->getInit();
71}
72
73const Expr *CXXForRangeStmt::getRangeInit() const {
74  return const_cast<CXXForRangeStmt *>(this)->getRangeInit();
75}
76
77VarDecl *CXXForRangeStmt::getLoopVariable() {
78  Decl *LV = cast<DeclStmt>(getLoopVarStmt())->getSingleDecl();
79  assert(LV && "No loop variable in CXXForRangeStmt");
80  return cast<VarDecl>(LV);
81}
82
83const VarDecl *CXXForRangeStmt::getLoopVariable() const {
84  return const_cast<CXXForRangeStmt *>(this)->getLoopVariable();
85}
86
87CoroutineBodyStmt *CoroutineBodyStmt::Create(
88    const ASTContext &C, CoroutineBodyStmt::CtorArgs const &Args) {
89  std::size_t Size = totalSizeToAlloc<Stmt *>(
90      CoroutineBodyStmt::FirstParamMove + Args.ParamMoves.size());
91
92  void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));
93  return new (Mem) CoroutineBodyStmt(Args);
94}
95
96CoroutineBodyStmt *CoroutineBodyStmt::Create(const ASTContext &C, EmptyShell,
97                                             unsigned NumParams) {
98  std::size_t Size = totalSizeToAlloc<Stmt *>(
99      CoroutineBodyStmt::FirstParamMove + NumParams);
100
101  void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));
102  auto *Result = new (Mem) CoroutineBodyStmt(CtorArgs());
103  Result->NumParams = NumParams;
104  auto *ParamBegin = Result->getStoredStmts() + SubStmt::FirstParamMove;
105  std::uninitialized_fill(ParamBegin, ParamBegin + NumParams,
106                          static_cast<Stmt *>(nullptr));
107  return Result;
108}
109
110CoroutineBodyStmt::CoroutineBodyStmt(CoroutineBodyStmt::CtorArgs const &Args)
111    : Stmt(CoroutineBodyStmtClass), NumParams(Args.ParamMoves.size()) {
112  Stmt **SubStmts = getStoredStmts();
113  SubStmts[CoroutineBodyStmt::Body] = Args.Body;
114  SubStmts[CoroutineBodyStmt::Promise] = Args.Promise;
115  SubStmts[CoroutineBodyStmt::InitSuspend] = Args.InitialSuspend;
116  SubStmts[CoroutineBodyStmt::FinalSuspend] = Args.FinalSuspend;
117  SubStmts[CoroutineBodyStmt::OnException] = Args.OnException;
118  SubStmts[CoroutineBodyStmt::OnFallthrough] = Args.OnFallthrough;
119  SubStmts[CoroutineBodyStmt::Allocate] = Args.Allocate;
120  SubStmts[CoroutineBodyStmt::Deallocate] = Args.Deallocate;
121  SubStmts[CoroutineBodyStmt::ResultDecl] = Args.ResultDecl;
122  SubStmts[CoroutineBodyStmt::ReturnValue] = Args.ReturnValue;
123  SubStmts[CoroutineBodyStmt::ReturnStmt] = Args.ReturnStmt;
124  SubStmts[CoroutineBodyStmt::ReturnStmtOnAllocFailure] =
125      Args.ReturnStmtOnAllocFailure;
126  std::copy(Args.ParamMoves.begin(), Args.ParamMoves.end(),
127            const_cast<Stmt **>(getParamMoves().data()));
128}
129