StmtCXX.cpp revision 360660 
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                               Stmt *tryBlock, ArrayRef<Stmt *> handlers) {
27  const size_t Size = totalSizeToAlloc<Stmt *>(handlers.size() + 1);
28  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
29  return new (Mem) CXXTryStmt(tryLoc, tryBlock, handlers);
30}
31
32CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, EmptyShell Empty,
33                               unsigned numHandlers) {
34  const size_t Size = totalSizeToAlloc<Stmt *>(numHandlers + 1);
35  void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
36  return new (Mem) CXXTryStmt(Empty, numHandlers);
37}
38
39CXXTryStmt::CXXTryStmt(SourceLocation tryLoc, Stmt *tryBlock,
40                       ArrayRef<Stmt *> handlers)
41    : Stmt(CXXTryStmtClass), TryLoc(tryLoc), NumHandlers(handlers.size()) {
42  Stmt **Stmts = getStmts();
43  Stmts[0] = tryBlock;
44  std::copy(handlers.begin(), handlers.end(), Stmts + 1);
45}
46
47CXXForRangeStmt::CXXForRangeStmt(Stmt *Init, DeclStmt *Range,
48                                 DeclStmt *BeginStmt, DeclStmt *EndStmt,
49                                 Expr *Cond, Expr *Inc, DeclStmt *LoopVar,
50                                 Stmt *Body, SourceLocation FL,
51                                 SourceLocation CAL, SourceLocation CL,
52                                 SourceLocation RPL)
53    : Stmt(CXXForRangeStmtClass), ForLoc(FL), CoawaitLoc(CAL), ColonLoc(CL),
54      RParenLoc(RPL) {
55  SubExprs[INIT] = Init;
56  SubExprs[RANGE] = Range;
57  SubExprs[BEGINSTMT] = BeginStmt;
58  SubExprs[ENDSTMT] = EndStmt;
59  SubExprs[COND] = Cond;
60  SubExprs[INC] = Inc;
61  SubExprs[LOOPVAR] = LoopVar;
62  SubExprs[BODY] = Body;
63}
64
65Expr *CXXForRangeStmt::getRangeInit() {
66  DeclStmt *RangeStmt = getRangeStmt();
67  VarDecl *RangeDecl = dyn_cast_or_null<VarDecl>(RangeStmt->getSingleDecl());
68  assert(RangeDecl && "for-range should have a single var decl");
69  return RangeDecl->getInit();
70}
71
72const Expr *CXXForRangeStmt::getRangeInit() const {
73  return const_cast<CXXForRangeStmt *>(this)->getRangeInit();
74}
75
76VarDecl *CXXForRangeStmt::getLoopVariable() {
77  Decl *LV = cast<DeclStmt>(getLoopVarStmt())->getSingleDecl();
78  assert(LV && "No loop variable in CXXForRangeStmt");
79  return cast<VarDecl>(LV);
80}
81
82const VarDecl *CXXForRangeStmt::getLoopVariable() const {
83  return const_cast<CXXForRangeStmt *>(this)->getLoopVariable();
84}
85
86CoroutineBodyStmt *CoroutineBodyStmt::Create(
87    const ASTContext &C, CoroutineBodyStmt::CtorArgs const &Args) {
88  std::size_t Size = totalSizeToAlloc<Stmt *>(
89      CoroutineBodyStmt::FirstParamMove + Args.ParamMoves.size());
90
91  void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));
92  return new (Mem) CoroutineBodyStmt(Args);
93}
94
95CoroutineBodyStmt *CoroutineBodyStmt::Create(const ASTContext &C, EmptyShell,
96                                             unsigned NumParams) {
97  std::size_t Size = totalSizeToAlloc<Stmt *>(
98      CoroutineBodyStmt::FirstParamMove + NumParams);
99
100  void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));
101  auto *Result = new (Mem) CoroutineBodyStmt(CtorArgs());
102  Result->NumParams = NumParams;
103  auto *ParamBegin = Result->getStoredStmts() + SubStmt::FirstParamMove;
104  std::uninitialized_fill(ParamBegin, ParamBegin + NumParams,
105                          static_cast<Stmt *>(nullptr));
106  return Result;
107}
108
109CoroutineBodyStmt::CoroutineBodyStmt(CoroutineBodyStmt::CtorArgs const &Args)
110    : Stmt(CoroutineBodyStmtClass), NumParams(Args.ParamMoves.size()) {
111  Stmt **SubStmts = getStoredStmts();
112  SubStmts[CoroutineBodyStmt::Body] = Args.Body;
113  SubStmts[CoroutineBodyStmt::Promise] = Args.Promise;
114  SubStmts[CoroutineBodyStmt::InitSuspend] = Args.InitialSuspend;
115  SubStmts[CoroutineBodyStmt::FinalSuspend] = Args.FinalSuspend;
116  SubStmts[CoroutineBodyStmt::OnException] = Args.OnException;
117  SubStmts[CoroutineBodyStmt::OnFallthrough] = Args.OnFallthrough;
118  SubStmts[CoroutineBodyStmt::Allocate] = Args.Allocate;
119  SubStmts[CoroutineBodyStmt::Deallocate] = Args.Deallocate;
120  SubStmts[CoroutineBodyStmt::ReturnValue] = Args.ReturnValue;
121  SubStmts[CoroutineBodyStmt::ResultDecl] = Args.ResultDecl;
122  SubStmts[CoroutineBodyStmt::ReturnStmt] = Args.ReturnStmt;
123  SubStmts[CoroutineBodyStmt::ReturnStmtOnAllocFailure] =
124      Args.ReturnStmtOnAllocFailure;
125  std::copy(Args.ParamMoves.begin(), Args.ParamMoves.end(),
126            const_cast<Stmt **>(getParamMoves().data()));
127}
128