Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Understanding C++ template partial specialization with pointer datatype arguments
Top Forums Programming Understanding C++ template partial specialization with pointer datatype arguments Post 302790337 by royalibrahim on Friday 5th of April 2013 07:28:40 AM
Old 04-05-2013
Understanding C++ template partial specialization with pointer datatype arguments
When I compile the below code, I am getting error as

Code:
template<typename T> T AddFun(T i, T j) {
    return i + j;
}

template<> T* AddFun<T*>(T* i, T* j) {
    return new T(*i + *j);
}

int main() {
    int n = AddFun<int>(10, 20);
    int i = 10, j = 20;
    int* p = AddFun<int*>(&i, &j);
}

9: error: ‘T’ does not name a type
13: error: expected unqualified-id before ‘int’


If I change the prototype to
Code:
template<typename T> T* AddFun<T*>(T* i, T* j)

then I get the error as 9: error: function template partial specialization ‘AddFun<T*>’ is not allowed.

Kindly help me to correct this problem.
 

10 More Discussions You Might Find Interesting

1. Programming

pass a pointer-to-pointer, or return a pointer?

If one wants to get a start address of a array or a string or a block of memory via a function, there are at least two methods to achieve it: (1) one is to pass a pointer-to-pointer parameter, like: int my_malloc(int size, char **pmem) { *pmem=(char *)malloc(size); if(*pmem==NULL)... (11 Replies)
Discussion started by: aaronwong
11 Replies

2. Programming

Help understanding pointer assignment in c

after some years of pause, im returning to c. char *varname = "asd"; int *number = 4; the above code is wrong, because its assigning a value to an unreserved space, or because its changing the address the pointer is pointing ? thanks for the replys!! (3 Replies)
Discussion started by: broli
3 Replies

3. Homework & Coursework Questions

Understanding Functions, sh, and arguments

1. The problem statement, all variables and given/known data: So I have to write a Bourne script that will add two numbers, taking only two arguments and informs the user when it is used incorrectly. 2. Relevant commands, code, scripts, algorithms: It has to be done in sh. I think overall,... (3 Replies)
Discussion started by: lee.n.doan
3 Replies

4. Programming

How to get the size of the datatype passed as the command line argumet?

#include <stdio.h> int main(int argc, char *argv) { printf("%d\n", sizeof(argv)); return 0; } when I run the executable a.out after compiling the above program as: a.out short (or) a.out "long double", I expected to get the output as 2 and 12, but I am always getting the size of... (2 Replies)
Discussion started by: royalibrahim
2 Replies

5. Shell Programming and Scripting

AWK - Print partial line/partial field

Hello, this is probably a simple request but I've been toying with it for a while. I have a large list of devices and commands that were run with a script, now I have lines such as: a-router-hostname-C#show ver I want to print everything up to (and excluding) the # and everything after it... (3 Replies)
Discussion started by: ippy98
3 Replies

6. Homework & Coursework Questions

trouble understanding file option and command line arguments

Hi, I am creating a program with the C language that simulates the WC command in Unix. My program needs to count lines, bytes and words. I have not added the code to count bytes and words yet. I am having trouble understanding what the file option/flag '-' does. I can not visualize how it moves... (1 Reply)
Discussion started by: heywoodfloyd
1 Replies

7. Shell Programming and Scripting

Help with separating datatype, column name

Hi All, I am new to unix but have a requirement wherein I need to separate datatype,length, and column name from input file which is of below format -- record integer(10) empid; string(25) name; date("YYYY-MM-DD") dob; decimal(10) salary; end now after getting datatype,its length and... (4 Replies)
Discussion started by: phoenix09
4 Replies

8. Shell Programming and Scripting

Datatype file validation

I have a sourcefile which contains data as below.I want to check whether datatype,structure and date format looks good as mentioned. Data is delemited by cydila . Source file-Emp.txt sno name phoneno dept joineddate 1 vivek 0861 CSE 2013-05-29 00:00:00 2 dinesh 123456 ECE ... (2 Replies)
Discussion started by: katakamvivek
2 Replies

9. Shell Programming and Scripting

Datatype and length validation

I have sourcefile and structure of source file,i want to check whether datatype and length mention in emp.txt is same as source file. Example: in emp.txt first row contains sno number so in source file also first column should contain only number if data is other than number then that... (1 Reply)
Discussion started by: katakamvivek
1 Replies

10. Shell Programming and Scripting

Datatype,structure and dateformat checking.

I have a sourcefile which contains data as below.I want to check whether datatype,structure and date format looks good as mentioned. Data is delemited by cydila Ç. Source file-Emp.txt snoÇnameÇphonenoÇdeptÇjoineddate 1ÇvivekÇ0861ÇCSEÇ2013-05-29 00:00:00 2ÇdineshÇ123456ÇECEÇ2013-05-29 00:00:00... (8 Replies)
Discussion started by: katakamvivek
8 Replies

LEARN ABOUT DEBIAN

redi

redi(3) 						     Library Functions Manual							   redi(3)

NAME

       redi -

       All PStreams classes are declared in namespace redi.

SYNOPSIS

   Classes
       struct pstreams
	   Common base class providing constants and typenames.
       class basic_pstreambuf
	   Class template for stream buffer.
       class pstream_common
	   Class template for common base class.
       class basic_ipstream
	   Class template for Input PStreams.
       class basic_opstream
	   Class template for Output PStreams.
       class basic_pstream
	   Class template for Bidirectional PStreams.
       class basic_rpstream
	   template for Restricted PStreams.

   Typedefs
       typedef basic_pstreambuf< char > pstreambuf
	   Type definition for common template specialisation.
       typedef basic_ipstream< char > ipstream
	   Type definition for common template specialisation.
       typedef basic_opstream< char > opstream
	   Type definition for common template specialisation.
       typedef basic_pstream< char > pstream
	   Type definition for common template specialisation.
       typedef basic_rpstream< char > rpstream
	   Type definition for common template specialisation.

Detailed Description
       All PStreams classes are declared in namespace redi.

       Like the standard iostreams, PStreams is a set of class templates, taking a character type and traits type. As with the standard streams
       they are most likely to be used with char and the default traits type, so typedefs for this most common case are provided.

       The pstream_common class template is not intended to be used directly, it is used internally to provide the common functionality for the
       other stream classes.

Author
       Generated automatically by Doxygen for PStreams from the source code.

PStreams							  Thu Nov 10 2011							   redi(3)
All times are GMT -4. The time now is 04:08 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy