AlphaRename.cxx

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#include <stdint.h>
#include <stdlib.h>
#include <dirent.h>
#include <fstream>
#include <iostream>
#include <string>
#include <sstream>
#include <libsherpa/UExcept.hxx>
#include <libsherpa/CVector.hxx>
#include <libsherpa/avl.hxx>
#include <assert.h>
#include "AST.hxx"

using namespace sherpa;

unsigned long tmpNameCounter = 0;

// Alpha rename is currently not being employed

void
AlphaRename(AST *ast)
{
  switch(ast->astType) {
  case at_ident:
    {
      if (ast->isGlobal())
        break;

      if (ast->symbolDef) {     // use occurrence, copy from defining
        assert(!ast->isGlobal());

        if (ast->symbolDef->identFlags & ID_IS_GENSYM) {
          ast->s = ast->symbolDef->s;
          ast->identFlags |= ID_IS_GENSYM;
        }
      }
      else {                    // defining occurrence
        if (!ast->isGlobal()) {
          std::stringstream ss;
          ss << "an_" << tmpNameCounter++;
          ast->s = ss.str();
          ast->identFlags |= ID_IS_GENSYM;
        }
      }

      break;
    }

  default:
    break;
  }

  for (size_t i = 0; i < ast->children.size(); i++) {
    AlphaRename(ast->children[i]);
  }
}

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