package Triangle.ContextualAnalyzer;

import java.util.List;
import java.util.Map;
import java.util.Stack;

import Triangle.AbstractSyntaxTrees.Declaration;

public final class SymbolTable {

  private Map<String, Stack<Declaration>> symtab;
  private List<List<String>> scopeStack;

  public SymbolTable () {
  }

  // Opens a new level in the identification table, 1 higher than the
  // current topmost level.
  public void openScope () {
  }

  // Closes the topmost level in the identification table, discarding
  // all entries belonging to that level.
  public void closeScope () {
  }

  // Makes a new entry in the identification table for the given identifier
  // and attribute. The new entry belongs to the current level.
  // duplicated is set to to true if there is already an entry for the
  // same identifier at the current level.
  public void enter (String id, Declaration attr) {
  }

  // Finds an entry for the given identifier in the identification table,
  // if any. If there are several entries for that identifier, finds the
  // entry at the highest level, in accordance with the scope rules.
  // Returns null if no entry is found.
  // otherwise returns the attribute field of the entry found.
  public Declaration retrieve (String id) {
	  return null;
  }

}