llvm/clang/lib/Interpreter/InterpreterValuePrinter.cpp

//===--- InterpreterValuePrinter.cpp - Value printing utils -----*- 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 implements routines for in-process value printing in clang-repl.
//
//===----------------------------------------------------------------------===//

#include "IncrementalParser.h"
#include "InterpreterUtils.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/PrettyPrinter.h"
#include "clang/AST/Type.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Interpreter/Interpreter.h"
#include "clang/Interpreter/Value.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/Lookup.h"
#include "clang/Sema/Sema.h"

#include "llvm/Support/Error.h"
#include "llvm/Support/raw_ostream.h"

#include <cassert>
#include <string>

#include <cstdarg>

namespace clang {

llvm::Expected<llvm::orc::ExecutorAddr>
Interpreter::CompileDtorCall(CXXRecordDecl *CXXRD) { … }

enum InterfaceKind { … };

class InterfaceKindVisitor
    : public TypeVisitor<InterfaceKindVisitor, InterfaceKind> { … };

// This synthesizes a call expression to a speciall
// function that is responsible for generating the Value.
// In general, we transform:
//   clang-repl> x
// To:
//   // 1. If x is a built-in type like int, float.
//   __clang_Interpreter_SetValueNoAlloc(ThisInterp, OpaqueValue, xQualType, x);
//   // 2. If x is a struct, and a lvalue.
//   __clang_Interpreter_SetValueNoAlloc(ThisInterp, OpaqueValue, xQualType,
//   &x);
//   // 3. If x is a struct, but a rvalue.
//   new (__clang_Interpreter_SetValueWithAlloc(ThisInterp, OpaqueValue,
//   xQualType)) (x);
llvm::Expected<Expr *> Interpreter::ExtractValueFromExpr(Expr *E) { … }

} // namespace clang

usingnamespaceclang;

// Temporary rvalue struct that need special care.
REPL_EXTERNAL_VISIBILITY void *
__clang_Interpreter_SetValueWithAlloc(void *This, void *OutVal,
                                      void *OpaqueType) { … }

extern "C" void REPL_EXTERNAL_VISIBILITY __clang_Interpreter_SetValueNoAlloc(
    void *This, void *OutVal, void *OpaqueType, ...) { … }

// A trampoline to work around the fact that operator placement new cannot
// really be forward declared due to libc++ and libstdc++ declaration mismatch.
// FIXME: __clang_Interpreter_NewTag is ODR violation because we get the same
// definition in the interpreter runtime. We should move it in a runtime header
// which gets included by the interpreter and here.
struct __clang_Interpreter_NewTag { … };
REPL_EXTERNAL_VISIBILITY void *
operator new(size_t __sz, void *__p, __clang_Interpreter_NewTag) noexcept { … }