cppast.cpp

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/*
The MIT License (MIT)
 
Copyright (c) 2018 Satya Das
 
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
                                                       the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
 
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
                                                               FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
                                    */
 
#include "cppast.h"
#include "cpputil.h"
 
#include "cppcompound-info-accessor.h"
#include "cppfunc-info-accessor.h"
#include "cppobj-info-accessor.h"
#include "cppvar-info-accessor.h"
 
bool CppConstructor::isCopyConstructor()
{
  if (isCopyConstructor_ != TriStateBool::Unknown)
    return isCopyConstructor_ == TriStateBool::True;
 
  isCopyConstructor_ = TriStateBool::False;
  if (!params_ || (params_->size() != 1))
    return false;
  auto& param = params_->front();
  if (!isVar(param.get()))
    return false;
  auto* var = static_cast<CppVar*>(param.get());
  if (ptrLevel(var->varType()) != 0)
    return false;
  if (!isConst(var->varType()) || !isByRef(var->varType()))
    return false;
  auto templStartPos = var->varType()->baseType().find('<');
  if (templStartPos != std::string::npos)
  {
    while (isspace(var->varType()->baseType()[--templStartPos]))
      ;
    ++templStartPos;
    if (var->varType()->baseType().substr(0, templStartPos) != name_)
      return false;
  }
  else if (var->varType()->baseType() != name_)
  {
    return false;
  }
  isCopyConstructor_ = TriStateBool::True;
 
  return true;
}
 
bool CppConstructor::isMoveConstructor()
{
  if (isMoveConstructor_ != TriStateBool::Unknown)
    return isMoveConstructor_ == TriStateBool::True;
 
  isMoveConstructor_ = TriStateBool::False;
  if (!params_ || (params_->size() != 1))
    return false;
  auto& param = params_->front();
  if (!isVar(param.get()))
    return false;
  auto* var = static_cast<CppVar*>(param.get());
  if (ptrLevel(var->varType()) != 0)
    return false;
  if (ptrLevel(var->varType()) != 0)
    return false;
  if (isConst(var->varType()) || !isByRValueRef(var->varType()))
    return false;
  auto templStartPos = var->varType()->baseType().find('<');
  if (templStartPos != std::string::npos)
  {
    while (isspace(var->varType()->baseType()[--templStartPos]))
      ;
    ++templStartPos;
    if (var->varType()->baseType().substr(0, templStartPos) != name_)
      return false;
  }
  else if (var->varType()->baseType() != name_)
  {
    return false;
  }
  isMoveConstructor_ = TriStateBool::True;
 
  return true;
}
 
bool CppCompound::hasPublicVirtualMethod()
{
  if (!isClassLike(this))
    return false;
  if (hasVirtual_ != TriStateBool::Unknown)
    return hasVirtual_ == TriStateBool::True;
 
  hasVirtual_ = TriStateBool::False;
  forEachMember(this, [&](CppObj* mem) {
    if (isFunction(mem) && isPublic(mem))
    {
      auto func = (CppFunction*) mem;
      if (func->attr() & (kVirtual | kOverride))
      {
        hasVirtual_ = TriStateBool::True;
        return true;
      }
    }
    return false;
  });
 
  return hasVirtual_ == TriStateBool::True;
}
 
bool CppCompound::hasPureVirtual()
{
  if (!isClassLike(this))
    return false;
  if (hasPureVirtual_ != TriStateBool::Unknown)
    return hasPureVirtual_ == TriStateBool::True;
 
  hasPureVirtual_ = TriStateBool::False;
  forEachMember(this, [&](CppObj* mem) {
    if (isFunction(mem))
    {
      auto func = static_cast<CppFunction*>(mem);
      if (isPureVirtual(func))
      {
        hasPureVirtual_ = TriStateBool::True;
        return true;
      }
    }
    else if (isDestructor(mem))
    {
      auto dtor = static_cast<CppDestructor*>(mem);
      if (isPureVirtual(dtor))
      {
        hasPureVirtual_ = TriStateBool::True;
        return true;
      }
    }
 
    return false;
  });
 
  return hasPureVirtual_ == TriStateBool::True;
}
 
bool CppCompound::triviallyConstructable()
{
  if (ctors_.empty())
    return true;
  for (auto* ctor : ctors_)
  {
    if (!ctor->hasParams())
      return true;
  }
  return false;
}
 
void CppCompound::assignSpecialMember(CppObj* mem)
{
  if (mem->objType_ == CppObjType::kConstructor)
  {
    auto* ctor = static_cast<CppConstructor*>(mem);
    ctors_.push_back(ctor);
    if (ctor->isCopyConstructor())
      copyCtor_ = ctor;
    else if (ctor->isMoveConstructor())
      moveCtor_ = ctor;
  }
  else if (mem->objType_ == CppObjType::kDestructor)
  {
    dtor_ = static_cast<CppDestructor*>(mem);
  }
}
 
CppObjType objType(CppObj* cppObj)
{
  return cppObj ? cppObj->objType_ : CppObjType::kUnknown;
}
 
bool operator==(const CppExpr& expr1, const CppExpr& expr2)
{
  if (expr1.flags_ != expr2.flags_)
    return false;
  if (expr1.oper_ != expr2.oper_)
    return false;
  if ((expr1.expr1_) != (expr2.expr1_))
    return false;
 
  if (expr1.oper_ < CppOperator::kBinaryOperatorStart)
    return true;
  if ((expr1.oper_ > CppOperator::kBinaryOperatorStart) && (expr1.oper_ < CppOperator::kBinaryOperatorEnd))
  {
    return ((expr1.expr2_) != (expr2.expr2_));
  }
 
  return false;
}