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//===- CoroutineStmtBuilder.h - Implicit coroutine stmt builder -*- C++ -*-===//
//
// 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 defines CoroutineStmtBuilder, a class for building the implicit
// statements required for building a coroutine body.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_SEMA_COROUTINESTMTBUILDER_H
#define LLVM_CLANG_LIB_SEMA_COROUTINESTMTBUILDER_H
#include "clang/AST/Decl.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/StmtCXX.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/SemaInternal.h"
namespace clang {
class CoroutineStmtBuilder : public CoroutineBodyStmt::CtorArgs {
Sema &S;
FunctionDecl &FD;
sema::FunctionScopeInfo &Fn;
bool IsValid = true;
SourceLocation Loc;
SmallVector<Stmt *, 4> ParamMovesVector;
const bool IsPromiseDependentType;
CXXRecordDecl *PromiseRecordDecl = nullptr;
public:
/// Construct a CoroutineStmtBuilder and initialize the promise
/// statement and initial/final suspends from the FunctionScopeInfo.
CoroutineStmtBuilder(Sema &S, FunctionDecl &FD, sema::FunctionScopeInfo &Fn,
Stmt *Body);
/// Build the coroutine body statements, including the
/// "promise dependent" statements when the promise type is not dependent.
bool buildStatements();
/// Build the coroutine body statements that require a non-dependent
/// promise type in order to construct.
///
/// For example different new/delete overloads are selected depending on
/// if the promise type provides `unhandled_exception()`, and therefore they
/// cannot be built until the promise type is complete so that we can perform
/// name lookup.
bool buildDependentStatements();
bool isInvalid() const { return !this->IsValid; }
private:
bool makePromiseStmt();
bool makeInitialAndFinalSuspend();
bool makeNewAndDeleteExpr();
bool makeOnFallthrough();
bool makeOnException();
bool makeReturnObject();
bool makeGroDeclAndReturnStmt();
bool makeReturnOnAllocFailure();
};
} // end namespace clang
#endif // LLVM_CLANG_LIB_SEMA_COROUTINESTMTBUILDER_H
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