267 lines
11 KiB
C++
267 lines
11 KiB
C++
//===--- StmtCXX.cpp - Classes for representing C++ statements ------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the subclesses of Stmt class declared in StmtCXX.h
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//
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//===----------------------------------------------------------------------===//
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#include "clang/AST/StmtCXX.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/ExprCXX.h"
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using namespace clang;
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QualType CXXCatchStmt::getCaughtType() const {
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if (ExceptionDecl)
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return ExceptionDecl->getType();
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return QualType();
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}
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CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, SourceLocation tryLoc,
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CompoundStmt *tryBlock,
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ArrayRef<Stmt *> handlers) {
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const size_t Size = totalSizeToAlloc<Stmt *>(handlers.size() + 1);
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void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
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return new (Mem) CXXTryStmt(tryLoc, tryBlock, handlers);
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}
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CXXTryStmt *CXXTryStmt::Create(const ASTContext &C, EmptyShell Empty,
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unsigned numHandlers) {
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const size_t Size = totalSizeToAlloc<Stmt *>(numHandlers + 1);
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void *Mem = C.Allocate(Size, alignof(CXXTryStmt));
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return new (Mem) CXXTryStmt(Empty, numHandlers);
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}
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CXXTryStmt::CXXTryStmt(SourceLocation tryLoc, CompoundStmt *tryBlock,
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ArrayRef<Stmt *> handlers)
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: Stmt(CXXTryStmtClass), TryLoc(tryLoc), NumHandlers(handlers.size()) {
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Stmt **Stmts = getStmts();
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Stmts[0] = tryBlock;
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llvm::copy(handlers, Stmts + 1);
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}
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CXXForRangeStmt::CXXForRangeStmt(Stmt *Init, DeclStmt *Range,
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DeclStmt *BeginStmt, DeclStmt *EndStmt,
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Expr *Cond, Expr *Inc, DeclStmt *LoopVar,
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Stmt *Body, SourceLocation FL,
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SourceLocation CAL, SourceLocation CL,
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SourceLocation RPL)
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: Stmt(CXXForRangeStmtClass), ForLoc(FL), CoawaitLoc(CAL), ColonLoc(CL),
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RParenLoc(RPL) {
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SubExprs[INIT] = Init;
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SubExprs[RANGE] = Range;
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SubExprs[BEGINSTMT] = BeginStmt;
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SubExprs[ENDSTMT] = EndStmt;
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SubExprs[COND] = Cond;
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SubExprs[INC] = Inc;
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SubExprs[LOOPVAR] = LoopVar;
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SubExprs[BODY] = Body;
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}
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Expr *CXXForRangeStmt::getRangeInit() {
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DeclStmt *RangeStmt = getRangeStmt();
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VarDecl *RangeDecl = dyn_cast_or_null<VarDecl>(RangeStmt->getSingleDecl());
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assert(RangeDecl && "for-range should have a single var decl");
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return RangeDecl->getInit();
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}
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const Expr *CXXForRangeStmt::getRangeInit() const {
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return const_cast<CXXForRangeStmt *>(this)->getRangeInit();
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}
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VarDecl *CXXForRangeStmt::getLoopVariable() {
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Decl *LV = cast<DeclStmt>(getLoopVarStmt())->getSingleDecl();
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assert(LV && "No loop variable in CXXForRangeStmt");
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return cast<VarDecl>(LV);
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}
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const VarDecl *CXXForRangeStmt::getLoopVariable() const {
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return const_cast<CXXForRangeStmt *>(this)->getLoopVariable();
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}
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CoroutineBodyStmt *CoroutineBodyStmt::Create(
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const ASTContext &C, CoroutineBodyStmt::CtorArgs const &Args) {
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std::size_t Size = totalSizeToAlloc<Stmt *>(
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CoroutineBodyStmt::FirstParamMove + Args.ParamMoves.size());
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void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));
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return new (Mem) CoroutineBodyStmt(Args);
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}
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CoroutineBodyStmt *CoroutineBodyStmt::Create(const ASTContext &C, EmptyShell,
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unsigned NumParams) {
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std::size_t Size = totalSizeToAlloc<Stmt *>(
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CoroutineBodyStmt::FirstParamMove + NumParams);
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void *Mem = C.Allocate(Size, alignof(CoroutineBodyStmt));
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auto *Result = new (Mem) CoroutineBodyStmt(CtorArgs());
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Result->NumParams = NumParams;
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auto *ParamBegin = Result->getStoredStmts() + SubStmt::FirstParamMove;
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std::uninitialized_fill(ParamBegin, ParamBegin + NumParams,
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static_cast<Stmt *>(nullptr));
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return Result;
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}
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CoroutineBodyStmt::CoroutineBodyStmt(CoroutineBodyStmt::CtorArgs const &Args)
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: Stmt(CoroutineBodyStmtClass), NumParams(Args.ParamMoves.size()) {
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Stmt **SubStmts = getStoredStmts();
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SubStmts[CoroutineBodyStmt::Body] = Args.Body;
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SubStmts[CoroutineBodyStmt::Promise] = Args.Promise;
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SubStmts[CoroutineBodyStmt::InitSuspend] = Args.InitialSuspend;
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SubStmts[CoroutineBodyStmt::FinalSuspend] = Args.FinalSuspend;
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SubStmts[CoroutineBodyStmt::OnException] = Args.OnException;
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SubStmts[CoroutineBodyStmt::OnFallthrough] = Args.OnFallthrough;
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SubStmts[CoroutineBodyStmt::Allocate] = Args.Allocate;
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SubStmts[CoroutineBodyStmt::Deallocate] = Args.Deallocate;
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SubStmts[CoroutineBodyStmt::ResultDecl] = Args.ResultDecl;
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SubStmts[CoroutineBodyStmt::ReturnValue] = Args.ReturnValue;
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SubStmts[CoroutineBodyStmt::ReturnStmt] = Args.ReturnStmt;
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SubStmts[CoroutineBodyStmt::ReturnStmtOnAllocFailure] =
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Args.ReturnStmtOnAllocFailure;
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llvm::copy(Args.ParamMoves, const_cast<Stmt **>(getParamMoves().data()));
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}
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CXXExpansionStmt::CXXExpansionStmt(
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StmtClass SC, Stmt *Init, DeclStmt *ExpansionVar, Expr *SizeExpr,
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SourceLocation TemplateKWLoc, SourceLocation ForLoc,
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SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation RParenLoc,
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Expr *TParamRef)
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: Stmt(SC),
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SubStmts {Init, TParamRef, ExpansionVar, SizeExpr, nullptr},
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Expansions(nullptr), TemplateKWLoc(TemplateKWLoc), ForLoc(ForLoc),
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LParenLoc(LParenLoc), ColonLoc(ColonLoc), RParenLoc(RParenLoc) { }
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VarDecl *CXXExpansionStmt::getExpansionVariable() {
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Decl *EV = cast<DeclStmt>(getExpansionVarStmt())->getSingleDecl();
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assert(EV && "No expansion variable in CXXExpansionStmt");
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return cast<VarDecl>(EV);
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}
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bool CXXExpansionStmt::hasDependentSize() const {
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switch (getStmtClass()) {
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case CXXIndeterminateExpansionStmtClass:
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return true;
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case CXXIterableExpansionStmtClass:
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return cast<CXXIterableExpansionStmt>(this)->hasDependentSize();
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case CXXDestructurableExpansionStmtClass:
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return cast<CXXDestructurableExpansionStmt>(this)->hasDependentSize();
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case CXXInitListExpansionStmtClass:
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return cast<CXXInitListExpansionStmt>(this)->hasDependentSize();
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}
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llvm_unreachable("unknown expansion statement kind");
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}
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unsigned CXXExpansionStmt::getNumInstantiations() const {
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assert(!hasDependentSize());
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switch (getStmtClass()) {
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case CXXIterableExpansionStmtClass:
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return cast<CXXIterableExpansionStmt>(this)->getNumInstantiations();
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case CXXDestructurableExpansionStmtClass:
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return cast<CXXDestructurableExpansionStmt>(this)->getNumInstantiations();
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case CXXInitListExpansionStmtClass:
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return cast<CXXInitListExpansionStmt>(this)->getNumInstantiations();
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}
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llvm_unreachable("unknown expansion statement kind");
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}
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CXXIndeterminateExpansionStmt *CXXIndeterminateExpansionStmt::Create(
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const ASTContext &C, Stmt *Init, DeclStmt *ExpansionVar,
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SourceLocation TemplateKWLoc, SourceLocation ForLoc,
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SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation RParenLoc,
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Expr *TParamRef) {
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return new (C) CXXIndeterminateExpansionStmt(Init, ExpansionVar,
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TemplateKWLoc, ForLoc, LParenLoc,
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ColonLoc, RParenLoc, TParamRef);
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}
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CXXIndeterminateExpansionStmt *CXXIndeterminateExpansionStmt::Create(
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const ASTContext &C, EmptyShell Empty) {
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return new (C) CXXIndeterminateExpansionStmt(Empty);
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}
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CXXIterableExpansionStmt *CXXIterableExpansionStmt::Create(
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const ASTContext &C, Stmt *Init, DeclStmt *ExpansionVar, Expr *SizeExpr,
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unsigned NumInstantiations, SourceLocation TemplateKWLoc,
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SourceLocation ForLoc, SourceLocation LParenLoc, SourceLocation ColonLoc,
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SourceLocation RParenLoc, Expr *TParamRef) {
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return new (C) CXXIterableExpansionStmt(Init, ExpansionVar, SizeExpr,
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NumInstantiations, TemplateKWLoc,
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ForLoc, LParenLoc, ColonLoc,
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RParenLoc, TParamRef);
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}
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CXXIterableExpansionStmt *CXXIterableExpansionStmt::Create(const ASTContext &C,
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EmptyShell Empty) {
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return new (C) CXXIterableExpansionStmt(Empty);
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}
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bool CXXIterableExpansionStmt::hasDependentSize() const {
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return cast<Expr>(getSizeExpr())->isValueDependent();
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}
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unsigned CXXIterableExpansionStmt::getNumInstantiations() const {
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return NumInstantiations;
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}
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CXXDestructurableExpansionStmt *CXXDestructurableExpansionStmt::Create(
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const ASTContext &C, Stmt *Init, DeclStmt *ExpansionVar,
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SourceLocation TemplateKWLoc, SourceLocation ForLoc,
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SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation RParenLoc,
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Expr *TParamRef) {
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return new (C) CXXDestructurableExpansionStmt(Init, ExpansionVar,
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TemplateKWLoc, ForLoc,
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LParenLoc, ColonLoc, RParenLoc,
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TParamRef);
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}
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CXXDestructurableExpansionStmt *CXXDestructurableExpansionStmt::Create(
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const ASTContext &C, EmptyShell Empty) {
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return new (C) CXXDestructurableExpansionStmt(Empty);
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}
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bool CXXDestructurableExpansionStmt::hasDependentSize() const {
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return false;
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}
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unsigned CXXDestructurableExpansionStmt::getNumInstantiations() const {
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const VarDecl *VD = getExpansionVariable();
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auto *Selector = cast<CXXDestructurableExpansionSelectExpr>(VD->getInit());
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return Selector->getDecompositionDecl()->bindings().size();
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}
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CXXInitListExpansionStmt *CXXInitListExpansionStmt::Create(
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const ASTContext &C, Stmt *Init, DeclStmt *ExpansionVar,
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SourceLocation TemplateKWLoc, SourceLocation ForLoc,
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SourceLocation LParenLoc, SourceLocation ColonLoc, SourceLocation RParenLoc,
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Expr *TParamRef) {
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return new (C) CXXInitListExpansionStmt(Init, ExpansionVar, TemplateKWLoc,
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ForLoc, LParenLoc, ColonLoc,
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RParenLoc, TParamRef);
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}
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CXXInitListExpansionStmt *CXXInitListExpansionStmt::Create(const ASTContext &C,
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EmptyShell Empty) {
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return new (C) CXXInitListExpansionStmt(Empty);
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}
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bool CXXInitListExpansionStmt::hasDependentSize() const {
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const auto *Init = cast<CXXExpansionInitListSelectExpr>(
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getExpansionVariable()->getInit());
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return cast<CXXExpansionInitListExpr>(Init->getRangeExpr())->containsPack();
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}
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unsigned CXXInitListExpansionStmt::getNumInstantiations() const {
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const auto *Init = cast<CXXExpansionInitListSelectExpr>(
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getExpansionVariable()->getInit());
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return cast<CXXExpansionInitListExpr>(Init->getRangeExpr())
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->getSubExprs().size();
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}
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