template: no matching function call. Converting const value to constreference.

cablepuff

template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, const typename
ContainerType:: reference, const typename ContainerType:: reference);

const BigInteger e(boost::lexica l_cast<BigInteg er>(rsa_encrypt s[2]));
const BigInteger
n(boost::lexica l_cast<BigInteg er>(rsa_encrypt s[1]));
std::string infile(rsa_encr ypts[0]);
boost::scoped_p tr<boost::files ystem::ifstream encrypt_input(n ew
boost::filesyst em::ifstream(in file));
const std::string
plaintext(std:: istreambuf_iter ator<char>(encr ypt_input->rdbuf()),
std::istreambuf _iterator<char> ());
std::list<BigIn teger>
decrypted_list( encryptcpw::rsa _encrypt_list<s td::list<BigInt eger>

>(plaintext, e, n)); // this is line 64.

std::vector<Big Integer>(cipher text).swap(ciph ertext);
// ... some code in between.
const std::string answer(encryptc pw::rsa_decrypt _list(ciphertex t, d,
n)); // this is line 102.
error on gcc:
../cs512/c++/RsaEncrypt.cpp: 64: error: no matching function for call to
'rsa_encr
ypt_list(const std::string&, const BigInteger&, const BigInteger&)'
../cs512/c++/RsaEncrypt.cpp: 102: error: no matching function for call
to 'rsa_dec
rypt_list(std:: vector<BigInteg er, std::allocator< BigInteger&, const
BigIntege
r&, const BigInteger&)'
error on msvc:
../cs512/c++/RsaEncrypt.cpp( 64) : error C2664:
'encryptcpw::rs a_encrypt_list' : cannot convert parameter 2 from
'const BigInteger' to 'BigInteger &'
Conversion loses qualifiers

Anybody know how to fix this.

Dec 6 '07 #1

Subscribe Reply

6569

tragomaskhalos

On Dec 6, 5:12 am, "cablep...@gmai l.com" <cablep...@gmai l.comwrote:

template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, const typename
ContainerType:: reference, const typename ContainerType:: reference);

const BigInteger e(boost::lexica l_cast<BigInteg er>(rsa_encrypt s[2]));
const BigInteger
n(boost::lexica l_cast<BigInteg er>(rsa_encrypt s[1]));
std::string infile(rsa_encr ypts[0]);
boost::scoped_p tr<boost::files ystem::ifstream encrypt_input(n ew
boost::filesyst em::ifstream(in file));
const std::string
plaintext(std:: istreambuf_iter ator<char>(encr ypt_input->rdbuf()),
std::istreambuf _iterator<char> ());
std::list<BigIn teger>
decrypted_list( encryptcpw::rsa _encrypt_list<s td::list<BigInt eger>

(plaintext, e, n)); // this is line 64.

std::vector<Big Integer>(cipher text).swap(ciph ertext);
// ... some code in between.
const std::string answer(encryptc pw::rsa_decrypt _list(ciphertex t, d,
n)); // this is line 102.

error on gcc:
./cs512/c++/RsaEncrypt.cpp: 64: error: no matching function for call to
'rsa_encr
ypt_list(const std::string&, const BigInteger&, const BigInteger&)'
./cs512/c++/RsaEncrypt.cpp: 102: error: no matching function for call
to 'rsa_dec
rypt_list(std:: vector<BigInteg er, std::allocator< BigInteger&, const
BigIntege
r&, const BigInteger&)'

error on msvc:
./cs512/c++/RsaEncrypt.cpp( 64) : error C2664:
'encryptcpw::rs a_encrypt_list' : cannot convert parameter 2 from
'const BigInteger' to 'BigInteger &'
Conversion loses qualifiers

Anybody know how to fix this.

I believe the problem is here:

template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, const typename
ContainerType:: reference, const typename ContainerType:: reference);

... you can't const-qualify ContainerType:: reference; Comeau online
gives warning "warning: type qualifiers are meaningless in this
declaration"

you need instead:
template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, typename
ContainerType:: const_reference , typename
ContainerType:: const_reference );

and define const_reference in your ContainerType(s ) accordingly.

Dec 6 '07 #2

cablepuff

On Dec 6, 5:05 am, tragomaskhalos <dave.du.verg.. .@logicacmg.com >
wrote:

On Dec 6, 5:12 am, "cablep...@gmai l.com" <cablep...@gmai l.comwrote:

template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, const typename
ContainerType:: reference, const typename ContainerType:: reference);

const BigInteger e(boost::lexica l_cast<BigInteg er>(rsa_encrypt s[2]));
const BigInteger
n(boost::lexica l_cast<BigInteg er>(rsa_encrypt s[1]));
std::string infile(rsa_encr ypts[0]);
boost::scoped_p tr<boost::files ystem::ifstream encrypt_input(n ew
boost::filesyst em::ifstream(in file));
const std::string
plaintext(std:: istreambuf_iter ator<char>(encr ypt_input->rdbuf()),
std::istreambuf _iterator<char> ());
std::list<BigIn teger>
decrypted_list( encryptcpw::rsa _encrypt_list<s td::list<BigInt eger>

>(plaintext, e, n)); // this is line 64.

std::vector<Big Integer>(cipher text).swap(ciph ertext);
// ... some code in between.
const std::string answer(encryptc pw::rsa_decrypt _list(ciphertex t, d,
n)); // this is line 102.

error on gcc:
./cs512/c++/RsaEncrypt.cpp: 64: error: no matching function for call to
'rsa_encr
ypt_list(const std::string&, const BigInteger&, const BigInteger&)'
./cs512/c++/RsaEncrypt.cpp: 102: error: no matching function for call
to 'rsa_dec
rypt_list(std:: vector<BigInteg er, std::allocator< BigInteger&, const
BigIntege
r&, const BigInteger&)'

error on msvc:
./cs512/c++/RsaEncrypt.cpp( 64) : error C2664:
'encryptcpw::rs a_encrypt_list' : cannot convert parameter 2 from
'const BigInteger' to 'BigInteger &'
Conversion loses qualifiers

Anybody know how to fix this.

I believe the problem is here:

template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, const typename
ContainerType:: reference, const typename ContainerType:: reference);

.. you can't const-qualify ContainerType:: reference; Comeau online
gives warning "warning: type qualifiers are meaningless in this
declaration"

you need instead:
template <typename ContainerType>
ContainerType rsa_encrypt_lis t(const std::string&, typename
ContainerType:: const_reference , typename
ContainerType:: const_reference );

and define const_reference in your ContainerType(s ) accordingly.

thanks that fixes everything.

Dec 7 '07 #3

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