I have the following struct:
typedef struct
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol) {
synonym = _synonym;
symbol = _symbol;
}
} Synonym ;
When I compile, I get the following warning:
: warning C4183: 'Synonym': missing return type; assumed to be a member
function returning 'int'
Can I not use constructors for structs?. I've seen this done many times
before ..
Is this bad practise ?
Should I worry about this warning ?
Further more, I want to populate this table with values. I want to
declare it as a static member in a class - something like:
Synonyms sym[] = {
....
};
I cant find anyway to do this (i.e. without compilation errors)
static Synonym syms[]
14  2430 
Bit Byte wrote:
I have the following struct:
typedef struct
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol) {
synonym = _synonym;
symbol = _symbol;
}
} Synonym ;
You're stuck in C ville. Your definition should look more like:
struct Synonym
{
...
};
Bit Byte wrote:
I have the following struct:
typedef struct
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol) {
synonym = _synonym;
symbol = _symbol;
}
} Synonym ;
When I compile, I get the following warning:
: warning C4183: 'Synonym': missing return type; assumed to be a member
function returning 'int'
Can I not use constructors for structs?. I've seen this done many times
before ..
You can, but how shall the compiler know that
Synonym(string _synonym, string _symbol)
is meant to be the constructor: it does not match the name of the struct,
which is anonymous. Your typedef just declares Synonym to be an alias for
the unnamed struct. If you want to use a struct like a class, use one that
has a name:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol) {
synonym = _synonym;
symbol = _symbol;
}
};
BTW: you may want to prefer initialization:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol)
: symbol ( _symbol )
, synonym ( _synonym )
{}
};
>
Is this bad practise ?
No. The legacy-typedef thing is.
Should I worry about this warning ?
Yes.
>
Further more, I want to populate this table with values. I want to
declare it as a static member in a class - something like:
Synonyms sym[] = {
....
};
I cant find anyway to do this (i.e. without compilation errors)
Your struct is not a POD. I think, there is no array-initializer syntax for
non-POD types.
Best
Kai-Uwe Bux
"Kai-Uwe Bux" <jk********@gmx .netwrote in message
news:ea******** **@murdoch.acc. Virginia.EDU...
BTW: you may want to prefer initialization:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol)
: symbol ( _symbol )
, synonym ( _synonym )
{}
};
>>
Is this bad practise ?
No. The legacy-typedef thing is.
As is the leading underscore in the variable names.
In article <cG************ *****@wagner.vi deotron.net>,
"Duane Hebert" <sp**@flarn2.co mwrote:
"Kai-Uwe Bux" <jk********@gmx .netwrote in message
news:ea******** **@murdoch.acc. Virginia.EDU...
BTW: you may want to prefer initialization:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol)
: symbol ( _symbol )
, synonym ( _synonym )
{}
};
>
Is this bad practise ?
No. The legacy-typedef thing is.
As is the leading underscore in the variable names.
Not in that particular context.
"Daniel T." <da******@earth link.netwrote in message
news:da******** *************** *****@news.west .earthlink.net. ..
In article <cG************ *****@wagner.vi deotron.net>,
"Duane Hebert" <sp**@flarn2.co mwrote:
>"Kai-Uwe Bux" <jk********@gmx .netwrote in message
news:ea******* ***@murdoch.acc .Virginia.EDU.. .
BTW: you may want to prefer initialization:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol)
: symbol ( _symbol )
, synonym ( _synonym )
{}
};
Is this bad practise ?
No. The legacy-typedef thing is.
As is the leading underscore in the variable names.
Not in that particular context.
Variable names with leading underscores are
reserved. I wasn't aware that there are
any conditions where they are allowed.
Duane Hebert wrote:
>
"Daniel T." <da******@earth link.netwrote in message
news:da******** *************** *****@news.west .earthlink.net. ..
>In article <cG************ *****@wagner.vi deotron.net>,
"Duane Hebert" <sp**@flarn2.co mwrote:
>>"Kai-Uwe Bux" <jk********@gmx .netwrote in message
news:ea****** ****@murdoch.ac c.Virginia.EDU. ..
BTW: you may want to prefer initialization:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol)
: symbol ( _symbol )
, synonym ( _synonym )
{}
};
Is this bad practise ?
No. The legacy-typedef thing is.
As is the leading underscore in the variable names.
Not in that particular context.
Variable names with leading underscores are reserved.
That is an over-simplification. Please refer to section [17.4.3.1.2] for the
details.
I wasn't aware that there are any conditions where they are allowed.
A name like _symbol is not unconditionally reserved. It is only reserved in
global namespace and ::std. Thus, as a parameter name, it is fine (although
it might shadow a name from global namespace).
Best
Kai-Uwe Bux
In article <5p************ *****@weber.vid eotron.net>,
"Duane Hebert" <sp**@flarn2.co mwrote:
"Daniel T." <da******@earth link.netwrote in message
news:da******** *************** *****@news.west .earthlink.net. ..
In article <cG************ *****@wagner.vi deotron.net>,
"Duane Hebert" <sp**@flarn2.co mwrote:
"Kai-Uwe Bux" <jk********@gmx .netwrote in message
news:ea******** **@murdoch.acc. Virginia.EDU...
BTW: you may want to prefer initialization:
struct Synonym
{
string symbol;
string synonym;
Synonym(string _synonym, string _symbol)
: symbol ( _symbol )
, synonym ( _synonym )
{}
};
Is this bad practise ?
No. The legacy-typedef thing is.
As is the leading underscore in the variable names.
Not in that particular context.
Variable names with leading underscores are
reserved. I wasn't aware that there are
any conditions where they are allowed.
They are only reserved in the global namespace.
"Daniel T." <da******@earth link.netwrote in message
news:da******** *************** *****@news.west .earthlink.net. ..
>Variable names with leading underscores are
reserved. I wasn't aware that there are
any conditions where they are allowed.
They are only reserved in the global namespace.
Ok.
>>>As is the leading underscore in the variable names.
Not in that particular context.
Variable names with leading underscores are
reserved. I wasn't aware that there are
any conditions where they are allowed.
They are only reserved in the global namespace.
Not quite. A leading underscore followed by a capital is reserved
implementation-wide, as a leading double underscore (or any identifier
with a double underscore anywhere). This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics | |
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