为什么不能在块之外填充静态映射 [英] Why is it no possible to fill a static map outside of a block
问题描述
亲爱的，
课堂定义
class X {
private ：
静态地图< string，map< string，int word_map;
static void initialize（）;
};
并在实现文件中，我可以在任何功能块之外的
功能块内填写地图。之前我问过这个问题
并得到一个回复，建议将这些行放入初始化程序
函数中。这很好但我想知道为什么我无法在功能块之外定义和确定
initiliaze。 as
word_map [" try"]。insert（make_pair（" try"，1））;
和外面的条目任何功能。这与
静态有关但无法解决这个问题。
谢谢
我忘了写我输入
map< string，map< string，int word_map;
first。
utab schreef：
亲爱的，
课堂定义
class X {
私人：
静态地图< string，map< string，int word_map;
static void initialize（）;
};
并在实现文件中，我可以在任何功能块之外的
功能块内填写地图。之前我问过这个问题
并得到一个回复，建议将这些行放入初始化程序
函数中。这很好但我想知道为什么我无法在功能块之外定义和确定
initiliaze。 as
word_map [" try"]。insert（make_pair（" try"，1））;
和外面的条目任何功能。这与
静态相关，但无法解决这个问题。
感谢
我忘了写我输入
map< string，map< string，int word_map;
first。
utab schreef：
亲爱的，
课堂定义
class X {
私人：
静态地图< string，map< string，int word_map;
static void initialize（）;
};
并在实现文件中，我可以在任何功能块之外的
功能块内填写地图。之前我问过这个问题
并得到一个回复，建议将这些行放入初始化程序
函数中。这很好但我想知道为什么我无法在功能块之外定义和确定
initiliaze。 as
word_map [" try"]。insert（make_pair（" try"，1））;
和外面的条目任何功能。这与
静态相关，但无法解决这个问题。
感谢
12月19日下午4:52，utab < umut.ta ... @ gmail.comwrote：
亲爱的，
在类定义中
class X {
private：
静态地图< string，map< string，int word_map;
static void initialize（）;
};
和在实现文件中，我可以在任何功能块之外的
功能块内填写地图。之前我问过这个问题
并得到一个回复，建议将这些行放入初始化程序
函数中。这很好但我想知道为什么我无法在功能块之外定义和确定
initiliaze。 as
word_map [" try"]。insert（make_pair（" try"，1））;
和外面的条目任何功能。这与
静态相关，但无法解决这个问题。
函数块之外的代码永远不会被执行，它只是关于应用程序启动时应该知道什么的信息。但地图
在此之前不存在。
-
Erik Wikstr？m
Dear all,
in a class definition
class X{
private:
static map< string , map<string, int word_map;
static void initialize();
};
and in the implementation file, I may fill out the map inside the
function block not outside any function block. I asked this question
before and got a reply advicing to put those lines in an initializer
function. This works fine but I wondered why I could not define and
initiliaze outside the function block. As
word_map["try"].insert(make_pair("try",1));
and the entries outside any of the functions. This is sth related to
static but could not figure that out.
thanks
I forgot to write I type
map< string , map<string, int word_map;
first.
utab schreef:
Dear all,
in a class definition
class X{
private:
static map< string , map<string, int word_map;
static void initialize();
};
and in the implementation file, I may fill out the map inside the
function block not outside any function block. I asked this question
before and got a reply advicing to put those lines in an initializer
function. This works fine but I wondered why I could not define and
initiliaze outside the function block. As
word_map["try"].insert(make_pair("try",1));
and the entries outside any of the functions. This is sth related to
static but could not figure that out.
thanks
I forgot to write I type
map< string , map<string, int word_map;
first.
utab schreef:
Dear all,
in a class definition
class X{
private:
static map< string , map<string, int word_map;
static void initialize();
};
and in the implementation file, I may fill out the map inside the
function block not outside any function block. I asked this question
before and got a reply advicing to put those lines in an initializer
function. This works fine but I wondered why I could not define and
initiliaze outside the function block. As
word_map["try"].insert(make_pair("try",1));
and the entries outside any of the functions. This is sth related to
static but could not figure that out.
thanks
On Dec 19, 4:52 pm, "utab" <umut.ta...@gmail.comwrote:Dear all,
in a class definition
class X{
private:
static map< string , map<string, int word_map;
static void initialize();
};
and in the implementation file, I may fill out the map inside the
function block not outside any function block. I asked this question
before and got a reply advicing to put those lines in an initializer
function. This works fine but I wondered why I could not define and
initiliaze outside the function block. As
word_map["try"].insert(make_pair("try",1));
and the entries outside any of the functions. This is sth related to
static but could not figure that out.Code outside a function-block is never executed, it''s just information
about what should be known when the application starts. But the map
does not exist before then.
--
Erik Wikstr?m
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