d****p
发帖数: 685 | 1 Is the following code right:
void foo()
{
struct MyFoo
{
int a;
int b;
};
MyFoo myFoo;
// do stuff
}
How about this one:
void foo()
{
struct MyFoo
{
int a;
int b;
};
std::vector myFooList;
// do stuff
} |
a****o
发帖数: 686 | |
d****p
发帖数: 685 | 3 正解。
我想说的时我和同事关于一个coding的分歧。
我喜欢用boost::tuple来表示一些临时的数据类型：经常我们在函数中局部定义。我的
同事认为用一个结构更可读。这点说他是对的。对比
typedef boost::tuple Position3D;
以及
struct Position3D
{
int x;
int y;
int z;
};
std::vector vertices;
//...
for (std::vector::iterator vertexItr = vertices.begin();
vertexItr != vertices.end(); ++vertexItr)
{
// vertexItr->x = 0; // local struct more readable
// vertexItr->first = 0; // boost::tuple
}
显然局部结构的代码更可读。
不过坏处就是无法作为模板参数。
【在 a****o 的大作中提到】
: template不能用local type吗？
|
t****t
发帖数: 6806 | 4 this restriction has been relieved in c++0x. gcc 4.5 supports it now.
【在 d****p 的大作中提到】
: 正解。
: 我想说的时我和同事关于一个coding的分歧。
: 我喜欢用boost::tuple来表示一些临时的数据类型：经常我们在函数中局部定义。我的
: 同事认为用一个结构更可读。这点说他是对的。对比
: typedef boost::tuple Position3D;
: 以及
: struct Position3D
: {
: int x;
: int y;
|
d****p
发帖数: 685 | 5 Oh, cool. I thought only Visual Studio supports it now.
I am very passionate about c++0x since it will make this language more
design friendly. I look forward to seeing things like auto and partial
template specialization.
【在 t****t 的大作中提到】
: this restriction has been relieved in c++0x. gcc 4.5 supports it now.
|
t****t
发帖数: 6806 | 6 isn't partial specialization from c++98?
or you meant variadic templates?
【在 d****p 的大作中提到】
: Oh, cool. I thought only Visual Studio supports it now.
: I am very passionate about c++0x since it will make this language more
: design friendly. I look forward to seeing things like auto and partial
: template specialization.
|
d****p
发帖数: 685 | 7 I meant partial specialization. I thought it was not in standard since
several compilers I use don't support it.
Definitely you are right that it is already in standard.
【在 t****t 的大作中提到】
: isn't partial specialization from c++98?
: or you meant variadic templates?
|
