xref: /freebsd/contrib/llvm-project/clang/lib/AST/StmtCXX.cpp (revision 257e70f1d5ee61037c8c59b116538d3b6b1427a2)
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 
17 using namespace clang;
18 
19 QualType CXXCatchStmt::getCaughtType() const {
20   if (ExceptionDecl)
21     return ExceptionDecl->getType();
22   return QualType();
23 }
24 
25 CXXTryStmt *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 
33 CXXTryStmt *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 
40 CXXTryStmt::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 
48 CXXForRangeStmt::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 
66 Expr *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 
73 const Expr *CXXForRangeStmt::getRangeInit() const {
74   return const_cast<CXXForRangeStmt *>(this)->getRangeInit();
75 }
76 
77 VarDecl *CXXForRangeStmt::getLoopVariable() {
78   Decl *LV = cast<DeclStmt>(getLoopVarStmt())->getSingleDecl();
79   assert(LV && "No loop variable in CXXForRangeStmt");
80   return cast<VarDecl>(LV);
81 }
82 
83 const VarDecl *CXXForRangeStmt::getLoopVariable() const {
84   return const_cast<CXXForRangeStmt *>(this)->getLoopVariable();
85 }
86 
87 CoroutineBodyStmt *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 
96 CoroutineBodyStmt *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 
110 CoroutineBodyStmt::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