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returning a map <int, stuct> from my member function in my class

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Pavan Shah-2

returning a map <int, stuct> from my member function in my class

Hello,

I have a function that returns a map <int, struct> .

However, the compiler complains.

my function declaration in my class is as follows:

map <int, struct> test_class:: test function().

In my function,

I define a struct Rows.

and my map is

map<int,Rows> Options

. return Options;

compiler doesn't like that.

There are messages:

1) one that is related to map <int, struct> : "Expected either a definition or a tag name"

2)one at the return statement : "no suitable user -defined conversion from "..." exists.

Any ideas please? It should be something simple that I am missing in my code.

thanks

Pavan

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Jan Ladislav Dussek

Re: returning a map <int, stuct> from my member function in my class

Define Rows outside of the function. If your struct is defined inside the function, then it cannot be made visible outside that function. In particular, it cannot be used as the return type of the function, which should be map<int,Rows> in any case.

Date: Fri, 11 Jan 2013 10:05:58 -0800
From: [hidden email]
To: [hidden email]
Subject: [Quantlib-users] returning a map <int, stuct> from my member function in my class

Hello,

I have a function that returns a map <int, struct> .

However, the compiler complains.

my function declaration in my class is as follows:

map <int, struct> test_class:: test function().

In my function,

I define a struct Rows.

and my map is

map<int,Rows> Options

. return Options;

compiler doesn't like that.

There are messages:

1) one that is related to map <int, struct> : "Expected either a definition or a tag name"

2)one at the return statement : "no suitable user -defined conversion from "..." exists.

Any ideas please? It should be something simple that I am missing in my code.

thanks

Pavan

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Pavan Shah-2

Re: returning a map <int, stuct> from my member function in my class

I believe it worked when I defined the structure in the same header file as my class but outside the function definition. In other words, as peter suggested, define the structure in my .h file.

I think it worked because the compiler doesn't give any errors.

However, when I tried to call this function from my int main (),

it doesn't work.

Can you see anything wrong with this function definition? Am I parsing a string date correctly by using the DateParser::parseISO(vec[4]) ? vec[4] is a string as you can see below but in my struct Rows, it expects a Date.

map<int,test_load::Rows> test_load::Load_Ports_Struct()

{

string data ("testfile.csv");

string line;

ifstream Ports(data.c_str());

typedef tokenizer <escaped_list_separator <char> > Tokenizer;

vector<string>vec;

int key;

//the actual data structure

map<int,test_load::Rows> Options; //////////////

while (getline(Ports,line))

{

Tokenizer tok(line);

vec.assign(tok.begin(),tok.end());

key=atoi(vec[0].c_str()); //tradeid in every row is the key

Rows each_option ={

vec[1],vec[2], vec[3], QuantLib::DateParser::parseISO(vec[4]), vec[5],atof(vec[6].c_str()),atof(vec[7].c_str()),vec[8],atof(vec[9].c_str()),

atof(vec[10].c_str()),atof(vec[11].c_str()),atof(vec[12].c_str()), QuantLib::DateParser::parseISO(vec[13])

};

//put the sample data into the map

Options[key]=each_option;

}

cout << Options[6003].Notional <<endl;

Ports.close();

return Options;

thanks a lot

Pavan

On Fri, Jan 11, 2013 at 12:15 PM, Jan Ladislav Dussek <[hidden email]> wrote:

Define Rows outside of the function. If your struct is defined inside the function, then it cannot be made visible outside that function. In particular, it cannot be used as the return type of the function, which should be map<int,Rows> in any case.

Date: Fri, 11 Jan 2013 10:05:58 -0800
From: [hidden email]
To: [hidden email]
Subject: [Quantlib-users] returning a map <int, stuct> from my member function in my class

Hello,

I have a function that returns a map <int, struct> .

However, the compiler complains.

my function declaration in my class is as follows:

map <int, struct> test_class:: test function().

In my function,
I define a struct Rows.
and my map is
map<int,Rows> Options

.
..
. return Options;
compiler doesn't like that.

There are messages:
1) one that is related to map <int, struct> : "Expected either a definition or a tag name"
2)one at the return statement : "no suitable user -defined conversion from "..." exists.

Any ideas please? It should be something simple that I am missing in my code.
thanks
Pavan

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Pavan Shah-2

Re: returning a map <int, stuct> from my member function in my class

Kyle,

thanks for the code

The compiler still errors out.

And I think I know why now.

The tradeDate and expDate in my csv file is of the format "10/6/2010" .

The compiler errors out and goes directly to dataparsers.cpp file. A window pops up that says "Unhandled exception at 0x75bbc41f in TestingQuantLib.exe: Microsoft C++ exception: QuantLib::Error at memory location 0x002ffb2c ."

Do you think this is the problem? Perhaps, "10/6/2010" is invalid format. btw, 10 = month, 6 = day, and 2010 = year .

All the dates in my file are in the format "10/6/2010" .

Thanks

Pavan

On Fri, Jan 11, 2013 at 9:35 PM, Kyle Schlansker <[hidden email]> wrote:

Pavan,

This should work for you:

map<int,test_load::Rows> test_load::Load_Ports_Struct()

{
string data ("testfile.csv");
string line;

ifstream Ports(data.c_str());

int key;
map<int,test_load::Rows> Options;

while ( Ports >> key ) {

std::string tradeDate, expDate;
test_load::Rows & option = Options[key];

Ports >> option.CounterParty
>> option.CurrencyPair
>> option.TradeType

>> tradeDate
>> option.Currency
>> option.Notional
>> option.Strike
>> option.Against_Currency

>> option.AgainstAmount
>> option.Premium
>> option.MarketSpotRate
>> option.MarketAllinRate
>> expDate;

option.TradeDate = QuantLib::DateParser::parseISO(tradeDate);
option.Expiry = QuantLib::DateParser::parseISO(expDate);
}

if (Options.count(6003) > 0) {
cout << "Options[6003].Notional = " << Options[6003].Notional <<endl;

} else {
cout << "Options map does not contain an option for key 6003 ..." << endl;

}

Ports.close();

return Options;
}

--
Kyle Schlansker
Partner
Parametros Capital LLC
<a href="tel:978.500.0388" value="+19785000388" target="_blank">978.500.0388

On Fri, Jan 11, 2013 at 4:33 PM, Pavan Shah <[hidden email]> wrote:

I believe it worked when I defined the structure in the same header file as my class but outside the function definition. In other words, as peter suggested, define the structure in my .h file.

I think it worked because the compiler doesn't give any errors.

However, when I tried to call this function from my int main (),

it doesn't work.

Can you see anything wrong with this function definition? Am I parsing a string date correctly by using the DateParser::parseISO(vec[4]) ? vec[4] is a string as you can see below but in my struct Rows, it expects a Date.

map<int,test_load::Rows> test_load::Load_Ports_Struct()
{
string data ("testfile.csv");
string line;

ifstream Ports(data.c_str());

typedef tokenizer <escaped_list_separator <char> > Tokenizer;

vector<string>vec;
int key;

//the actual data structure
map<int,test_load::Rows> Options; //////////////

while (getline(Ports,line))
{

Tokenizer tok(line);
vec.assign(tok.begin(),tok.end());

key=atoi(vec[0].c_str()); //tradeid in every row is the key

Rows each_option ={
vec[1],vec[2], vec[3], QuantLib::DateParser::parseISO(vec[4]), vec[5],atof(vec[6].c_str()),atof(vec[7].c_str()),vec[8],atof(vec[9].c_str()),

atof(vec[10].c_str()),atof(vec[11].c_str()),atof(vec[12].c_str()), QuantLib::DateParser::parseISO(vec[13])
};

//put the sample data into the map
Options[key]=each_option;

}

cout << Options[6003].Notional <<endl;

Ports.close();
return Options;

thanks a lot
Pavan

On Fri, Jan 11, 2013 at 12:15 PM, Jan Ladislav Dussek <[hidden email]> wrote:

Define Rows outside of the function. If your struct is defined inside the function, then it cannot be made visible outside that function. In particular, it cannot be used as the return type of the function, which should be map<int,Rows> in any case.

Date: Fri, 11 Jan 2013 10:05:58 -0800
From: [hidden email]
To: [hidden email]
Subject: [Quantlib-users] returning a map <int, stuct> from my member function in my class

Hello,

I have a function that returns a map <int, struct> .

However, the compiler complains.

my function declaration in my class is as follows:

map <int, struct> test_class:: test function().

In my function,
I define a struct Rows.
and my map is
map<int,Rows> Options

.
..
. return Options;
compiler doesn't like that.

There are messages:
1) one that is related to map <int, struct> : "Expected either a definition or a tag name"
2)one at the return statement : "no suitable user -defined conversion from "..." exists.

Any ideas please? It should be something simple that I am missing in my code.
thanks
Pavan

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