| kpachopoulos |
08-30-2007 04:34 PM |
error: ISO C++ forbids declaration of 'hash_map' with no type
Hi,
here's the following header file, which produces the errors seen after it. I am using the "newer" hash_map (ext/hash_map), not backward compatibility one (backward/hash_map.h) and g++ 4.1:
Code:
#ifndef _FinancialProductsMatrix_H
#define _FinancialProductsMatrix_H
#include <ext/hash_map>
#include <string>
#include <iostream>
#include <boost/lexical_cast.hpp>
typedef std::string string;
/*****************************************
* FinancialProductsMatrix.h
* =======================================
*
* the form of the matrix & compression issues:
* (1) equivalanceFromTo(currency1,currency2)==
* 1 / equivalanceFromTo(currency2,currency1)
* (2) equivalanceFromTo(currency1,currency1)==1
*
* Given 1 and 2 and for a number N of currencies, we do not need a full real
* matrix of size (N*N), but storage of size (N*N)-(#diagonial cells)-(#cells of the
* lower left part of matrix seperated by the main diagonal). That is N*(N-1)/2
* double memory cells in total.
*
* Naming conventions:
* We will refer to the number of double cells as "the matrix" - although not a
* real full matrix.
* We will refer to the lower left part of matrix seperated by the main diagonal
* as the "lower half" and to the upper right part as the "upper half"
*
*****************************************/
//Explicit template specialization of hash of a string class,
//which just uses the internal char* representation as a wrapper.
//hash<const char*> has already been defined
struct hash
{
size_t operator() (const string& x) const
{
return hash()(x.c_str());
}
};
struct eqstr
{
bool operator()(string s1, string s2) const
{
return strcmp(s1.c_str(), s2.c_str()) == 0;
}
};
class FinancialProductsMatrix
{
private:
//CLASS MEMBER FIELDS
//
//number of financial products (either currency, or bonds, etc)
int numOfFProducts_;
//the matrix, that stores the currency equivalance
double *equivMatrix_;
//maps currency names(ISO namings) to a specific row and column
//of the matrix (row_num==col_num)
////////////////////////////
//PROBLEMATIC LINE BELOW!!!!!!!!//
////////////////////////////
hash_map<string,int,hash,eqstr> fProductToId_;
//maps a specific row and column of the matrix (row_num==col_num) to
//currency names(ISO namings)
////////////////////////////
//PROBLEMATIC LINE BELOW!!!!!!!!//
////////////////////////////
hash_map<int,string> idToFProduct_;
//the next "product id", that will be used for the new financial product,
//that will be enlisted. Essentially the row and column (column==row),
//that this product will take over in the matrix.
int nextFProductId_;
////////////////////////////////////////////////////////////////////////
//CLASS MEMBER METHODS
//
//directly access the matrix and change the equivalance value kept
//in the cell specified by row and column
void updateEquivalance4MatrixId(int row, int column,double value);
//directly access the matrix and get the equivalance value kept
//in the cell specified by row and column
double getEquivalance4MatrixId(int row, int column);
//sets all doubles values of the matrix to 0.0
void initMatrix();
////////////////////////////////////////////////////////////////////////
public:
//constructor
FinancialProductsMatrix(int numOfFProducts);
//destructor
~FinancialProductsMatrix();
//update the (fromProduct->toProduct) equivalance value
void updateEquivalance4ISONames(string fromProduct, string toProduct,double value);
//get the (fromProduct->toProduct) equivalance value
double getEquivalance4ISONames(string fromProduct,string toProduct);
//creates the entries to the suitable tables, needed for enlisting a
//new financial product
bool enlistNewFProduct(string name);
//returns the number of financial products
int getFProductsNumber();
//print the equivalance values
string printMatrix();
};
#endif
I get the following compiler errors- the problematic sources lines have been marked with comments in the source code:
Code:
Running "rm -rf build/Debug/GNU-Generic/FinancialProductsMatrix.o" in /shared/kostas/programming/c++/arbigames
Clean successful. Exit value 0.
Running "make -f nbproject/Makefile-Debug.mk build/Debug/GNU-Generic/FinancialProductsMatrix.o" in /shared/kostas/programming/c++/arbigames
mkdir -p build/Debug/GNU-Generic
g++ -c -g -o build/Debug/GNU-Generic/FinancialProductsMatrix.o FinancialProductsMatrix.cc
FinancialProductsMatrix.h:67: error: ISO C++ forbids declaration of ‘hash_map’ with no type
FinancialProductsMatrix.h:67: error: expected ‘;’ before ‘<’ token
FinancialProductsMatrix.h:72: error: ISO C++ forbids declaration of ‘hash_map’ with no type
FinancialProductsMatrix.h:72: error: expected ‘;’ before ‘<’ token
FinancialProductsMatrix.cc: In member function ‘double FinancialProductsMatrix::getEquivalance4ISONames(string, string)’:
FinancialProductsMatrix.cc:126: error: ‘fProductToId_’ was not declared in this scope
FinancialProductsMatrix.cc: In member function ‘void FinancialProductsMatrix::updateEquivalance4ISONames(string, string, double)’:
FinancialProductsMatrix.cc:137: error: ‘fProductToId_’ was not declared in this scope
FinancialProductsMatrix.cc: In member function ‘bool FinancialProductsMatrix::enlistNewFProduct(string)’:
FinancialProductsMatrix.cc:156: error: ‘idToFProduct_’ was not declared in this scope
FinancialProductsMatrix.cc:157: error: ‘fProductToId_’ was not declared in this scope
FinancialProductsMatrix.cc: In member function ‘string FinancialProductsMatrix::printMatrix()’:
FinancialProductsMatrix.cc:188: error: ‘idToFProduct_’ was not declared in this scope
make: *** [build/Debug/GNU-Generic/FinancialProductsMatrix.o] Error 1
Build failed. Exit value 2.
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