NoAllocCheck.cxx

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#include <assert.h>
#include <stdint.h>
#include <stdlib.h>
#include <dirent.h>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>

#include <libsherpa/UExcept.hxx>

#include "Options.hxx"
#include "AST.hxx"
#include "Type.hxx"
#include "inter-pass.hxx"

using namespace boost;
using namespace sherpa;

// Return whether the expression performs an allocating operation or not.
static bool
AllocCheck(std::ostream &errStream, shared_ptr<AST> ast)
{
  bool errFree = true;

  switch (ast->astType) {
  case at_vector:
  case at_MakeVector:
    errStream << ast->loc << ": "
              << "Expression requires dynamic allocation. "
              << "Disallowed in NO-GC mode"
              << std::endl;
    errFree = false;
    break;

  case at_struct_apply:
  case at_object_apply:
  case at_ucon_apply:
    if (ast->child(0)->symType->isRefType()) {
      errStream << ast->loc << ": "
                << "Expression requires dynamic allocation. "
                << "Disallowed in NO-GC mode"
                << std::endl;
      errFree = false;
    }
    break;
    
  default:
    break;
  }
  
  for (size_t c = 0; c < ast->children.size(); c++)
    CHKERR(errFree, AllocCheck(errStream, ast->child(c)));
  
  return errFree;           
}

bool
UocInfo::fe_noAllocCheck(std::ostream& errStream, 
                         bool init, unsigned long flags)
{
  /* This pass only recognizes syntactic structures that perform
     memory alocation. The requirement not performing closure
     conversion is checked in the clconv pass */

  bool errFree=true;

  if (Options::noAlloc)
    CHKERR(errFree, AllocCheck(errStream, uocAst));  
  return errFree;
}

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