source: liacs/coco/assignment4/SymbolTable.h@ 422

/*

 * SymbolTable.h

 *

 * This file contains the declaration of the "SymbolTable" structure.

 * It is part of the assignment for the Compiler Construction course at the

 * Leiden Institute of Advanced Computer Science (LIACS), Leiden University.

 *

 * Note: when a SymbolTable is deleted, all Scope objects contained in that

 *       SymbolTable are also deleted.

 */



#ifndef _SYMBOLTABLE_H_

#define _SYMBOLTABLE_H_



#include <cstdio>

#include <string>

#include <vector>



#include "Scope.h"

#include "Symbol.h"



using namespace std;



class SymbolTable {

  public:

    // Constructor

    SymbolTable ();



    // Destructor: deletes all Scopes contained in this SymbolTable

    ~SymbolTable ();



    // Creates a new Scope with the given name and sets it as current scope.

    // Returns NULL if the name is already used.

    Scope * AddScope (string scope);



    // Returns a pointer to the Scope object with the given name

    Scope * GetScope (string scope);



    // Returns a pointer to the root scope

    Scope * GetRootScope ();



    // Set the current scope

    // Returns -1 on error

    int SetCurrentScope (string scope);



    // Get the current scope name

    string GetCurrentScopeName ();



    // Adds a symbol to the current scope

    // Returns -1 on error

    int AddSymbol (Symbol * symbol);



    // Adds a symbol to the given scope

    // Returns -1 on error

    int AddSymbol (string scope, Symbol * symbol);



    // Find a symbol in the current scope, or look in the parent scope, if it

    // cannot be found in the current one.

    // Returns NULL if the symbol cannot be found anywhere.

    Symbol * GetSymbol (string name);



    // Find a symbol in the given scope; optionally look in the parent scope,

    // if it cannot be found in the given one.

    // Returns NULL if the symbol cannot be found.

    Symbol * GetSymbol (string scope, string name, bool lookInParentScope);



    // Dump the contents of the symbol table

    void Dump (FILE * file);



  private:

    int myCurrentScope;

    vector<Scope *> myScopes;

};//SymbolTable



#endif