Книга: Standard Template Library Programmer
project2nd
Разделы на этой странице:
project2nd<Arg1, Arg2>
Category: functors
Component type: type
Description
Project2nd is a function object that takes two arguments and returns its second argument; the first argument is unused. It is essentially a generalization of identity to the case of a Binary Function.
Example
int main() {
vector<char*> v1(10, (char*) 0);
vector<int> v2(10, 137);
vector<int> result(10);
transform(v1.begin(), v1.end(), v2.begin(), result.begin(), project2nd<char*, int>());
assert(equal(v2.begin(), v2.end(), result.begin()));
}
Definition
Defined in the standard header functional, and in the nonstandard backward-compatibility header function.h. This function object is an SGI extension; it is not part of the C++ standard.
Template parameters
Parameter | Description |
---|---|
Arg1 |
project2nd's first argument type. |
Arg2 |
project2nd's second argument type, and its result type. |
Model of
Adaptable Binary Function
Type requirements
None.
Public base classes
binary_function<Arg1, Arg2, Arg2>
Members
Member | Where defined | Description |
---|---|---|
first_argument_type |
Adaptable Binary Function | The type of project2nd's first argument: Arg1 |
second_argument_type |
Adaptable Binary Function | The type of project2nd's second argument: Arg2 |
result_type |
Adaptable Binary Function | The type of the result: Arg2. |
Arg1 operator()(const Arg1&, const Arg2& y) const |
Adaptable Binary Function | Function call. The return value is y. |
New members
All of project2nd's members are defined in the Adaptable Binary Function requirements. project2nd does not introduce any new members.
See also
Function objects, identity, project1st, select1st, select2nd
- Project PDL
- Глава 5. Разработка и анализ бизнес-планов в системе Project Expert
- Turtle Firewall Project
- Testing the Project
- Using the C Programming Project Management Tools Provided with Fedora Linux
- Managing Software Projects with Subversion
- The Fedora Project
- Fedora Project Mailing Lists
- CHAPTER 6 Simple PIC18 Projects
- CHAPTER 7 Advanced PIC18 Projects — SD Card Projects
- CHAPTER 8 Advanced PIC18 Projects — USB Bus Projects
- CHAPTER 9 Advanced PIC18 Projects — CAN Bus Projects