Asp Forum - typedef Syntax Error

mrc2323

10/31/2008 9:01:00 PM

I'm getting a syntax error on the "typedef" code line here. Any
thoughts on why? TIA

struct CSTYPE
{ // City/State Record
string csKey; // City/State "Key"
string csCity; // City
string csState; // State Code
};
typedef map<string, CSTYPE> CSINFO; // <=== error here
extern CSINFO cityStInfo;
extern map<string, CSTYPE>::iterator csIter;
extern CSTYPE workCS;

14 Answers

red floyd

10/31/2008 9:04:00 PM

On Oct 31, 2:01 pm, mrc2...@cox.net (Mike Copeland) wrote:
> I'm getting a syntax error on the "typedef" code line here. Any
> thoughts on why? TIA
>
> struct CSTYPE
> { // City/State Record
> string csKey; // City/State "Key"
> string csCity; // City
> string csState; // State Code};
>
> typedef map<string, CSTYPE> CSINFO; // <=== error here
> extern CSINFO cityStInfo;
> extern map<string, CSTYPE>::iterator csIter;
> extern CSTYPE workCS;

1. did you #include <map> and <string>?
2. map and string live in the std:: namespace
3. Would you care to describe the specific error?

Victor Bazarov

10/31/2008 9:17:00 PM

red floyd wrote:
> On Oct 31, 2:01 pm, mrc2...@cox.net (Mike Copeland) wrote:
>> I'm getting a syntax error on the "typedef" code line here. Any
>> thoughts on why? TIA
>>
>> struct CSTYPE
>> { // City/State Record
>> string csKey; // City/State "Key"
>> string csCity; // City
>> string csState; // State Code};
>>
>> typedef map<string, CSTYPE> CSINFO; // <=== error here
>> extern CSINFO cityStInfo;
>> extern map<string, CSTYPE>::iterator csIter;
>> extern CSTYPE workCS;
>
>
> 1. did you #include <map> and <string>?
> 2. map and string live in the std:: namespace
> 3. Would you care to describe the specific error?

It's possible that his compiler does not allow the use of incomplete
types as template arguments, even in typedefs, and 'CSTYPE' is
incomplete at that point...

V
--
Please remove capital 'A's when replying by e-mail
I do not respond to top-posted replies, please don't ask

Jeff Schwab

10/31/2008 9:21:00 PM

Mike Copeland wrote:
> I'm getting a syntax error on the "typedef" code line here.
....

The following appears to work as expected w/GCC 4.

#include <map>
#include <string>

using std::map;
using std::string;

// TODO: Expand "cs" to something more meaningful.
namespace cs {

// TODO: Give this type a more meaningful name.
struct type {
string key;
string city;
string state;
};

typedef map<string, type> info;
}

#include <iostream>

int main() {

cs::info info;

info["hello"].key = "world";
info["foo"].key = "bar";

std::cout << info["hello"].key << '\n';
std::cout << info["foo"].key << '\n';
}

mrc2323

10/31/2008 9:43:00 PM

> >> I'm getting a syntax error on the "typedef" code line here. Any
> >> thoughts on why? TIA
> >>
> >> struct CSTYPE
> >> { // City/State Record
> >> string csKey; // City/State "Key"
> >> string csCity; // City
> >> string csState; // State Code
> >> }; <==== this was in my post, but was appended to the above line.
> >>
> >> typedef map<string, CSTYPE> CSINFO; // <=== error here
> >> extern CSINFO cityStInfo;
> >> extern map<string, CSTYPE>::iterator csIter;
> >> extern CSTYPE workCS;
> >
> >
> > 1. did you #include <map> and <string>?
> > 2. map and string live in the std:: namespace
> > 3. Would you care to describe the specific error?
>
> It's possible that his compiler does not allow the use of incomplete
> types as template arguments, even in typedefs, and 'CSTYPE' is
> incomplete at that point...

Yes, but please see my common above. I _thought_ I had a complete
declaration for CSTYPE - am I wrong?

mrc2323

10/31/2008 9:43:00 PM

> > I'm getting a syntax error on the "typedef" code line here. Any
> > thoughts on why? TIA
> >
> > struct CSTYPE // City/State Record
> > {
> > string csKey;// City/State "Key"
> > string csCity; // City
> > string csState; // State Code
> > };
> > typedef map<string, CSTYPE> CSINFO; // <= error here
> > extern CSINFO cityStInfo;
> > extern map<string, CSTYPE>::iterator csIter;
> > extern CSTYPE workCS;
>
>
> 1. did you #include <map> and <string>?
> 2. map and string live in the std:: namespace
> 3. Would you care to describe the specific error?

I didn't state the error (C2143) because it's compiler-specififc
(VC++ 6.0) and I know that's a no-no here. 8<{{
I also didn't state that this is in a common .h file I'm building
(and I apologize for not mentioning that...)

James Kanze

11/1/2008 8:49:00 AM

On Oct 31, 10:16 pm, Victor Bazarov <v.Abaza...@comAcast.net>
wrote:
> red floyd wrote:
> > On Oct 31, 2:01 pm, mrc2...@cox.net (Mike Copeland) wrote:
> >> I'm getting a syntax error on the "typedef" code line here.
> >> Any thoughts on why? TIA

> >> struct CSTYPE
> >> { // City/State Record
> >> string csKey; // City/State "Key"
> >> string csCity; // City
> >> string csState; // State Code};

> >> typedef map<string, CSTYPE> CSINFO; // <=== error here
> >> extern CSINFO cityStInfo;
> >> extern map<string, CSTYPE>::iterator csIter;
> >> extern CSTYPE workCS;

> > 1. did you #include <map> and <string>?
> > 2. map and string live in the std:: namespace
> > 3. Would you care to describe the specific error?

> It's possible that his compiler does not allow the use of
> incomplete types as template arguments, even in typedefs, and
> 'CSTYPE' is incomplete at that point...

That wasn't the case in his original code. If you'll look at
the end of the line "string csState;", you'll see the closing
brace of CSTYPE. For some reasons, something in the news very
often seems to move a line with just a }: to the end of the
preceding line. (I've always suspected Google, because that's
what I use to read news, and I'm constantly seeing this.)

Without the closing brace, of course, the code would be illegal.
Because of the incomplete type, but also because you're not
allowed to use extern in a class either (and that error requires
a dignostic).

Like Mike, I rather suspect that he's either forgotten the
include, and he's clearly fogotten the std::. Which means that
string and map are unknown symbols. To reasonably parse C++,
the compiler needs to know when a symbol names a type; use an
unknown symbol where a type is required, the compiler will
generally suppose it isn't a type (which results in a syntax
error), and the quality of the error messages go downhill from
there.

--
James Kanze (GABI Software) email:james.kanze@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

James Kanze

11/1/2008 8:53:00 AM

On Oct 31, 10:43 pm, mrc2...@cox.net (Mike Copeland) wrote:
> > >> I'm getting a syntax error on the "typedef" code line here. Any
> > >> thoughts on why? TIA

> > >> struct CSTYPE
> > >> { // City/State Record
> > >> string csKey; // City/State "Key"
> > >> string csCity; // City
> > >> string csState; // State Code
> > >> }; <==== this was in my post, but was appended to the above line.

> > It's possible that his compiler does not allow the use of
> > incomplete types as template arguments, even in typedefs,
> > and 'CSTYPE' is incomplete at that point...

> Yes, but please see my common above. I _thought_ I had a
> complete declaration for CSTYPE - am I wrong?

You did. Your original posting was correct in this regard, but
something in the net seems to occasionally (often, in fact) join
a line with just a "}" or a "};" with the preceding line. If
the preceding line doesn't end with a comment, it doesn't affect
the legality of the code, but it is an unusual formatting. (I
asked about this once, since I was seeing so many postings with
this unusual formatting, and thought it might be some new coding
convention I wasn't familiar with. The poster in question
assured me that the }; was on a separate line when the posting
left his machine.)

--
James Kanze (GABI Software) email:james.kanze@gmail.com
Conseils en informatique orientée objet/
Beratung in objektorientierter Datenverarbeitung
9 place Sémard, 78210 St.-Cyr-l'École, France, +33 (0)1 30 23 00 34

Jim Langston

11/1/2008 9:06:00 AM

"Mike Copeland" <mrc2323@cox.net> wrote in message
news:MPG.237529dc75782682989730@news.cox.net...
>> > I'm getting a syntax error on the "typedef" code line here. Any
>> > thoughts on why? TIA
>> >
>> > struct CSTYPE // City/State Record
>> > {
>> > string csKey;// City/State "Key"
>> > string csCity; // City
>> > string csState; // State Code
>> > };
>> > typedef map<string, CSTYPE> CSINFO; // <= error here
>> > extern CSINFO cityStInfo;
>> > extern map<string, CSTYPE>::iterator csIter;
>> > extern CSTYPE workCS;
>>
>>
>> 1. did you #include <map> and <string>?
>> 2. map and string live in the std:: namespace
>> 3. Would you care to describe the specific error?
>
> I didn't state the error (C2143) because it's compiler-specififc
> (VC++ 6.0) and I know that's a no-no here. 8<{{

There is no reason I know of to use VC++ 6.0 when you can download VC++ 8.0
for free from Microsoft which is much better and up to date. See here.
http://www.microsoft.com/express...

> I also didn't state that this is in a common .h file I'm building
> (and I apologize for not mentioning that...)

Bo Persson

11/1/2008 11:34:00 AM

Jim Langston wrote:
> "Mike Copeland" <mrc2323@cox.net> wrote in message
> news:MPG.237529dc75782682989730@news.cox.net...
>>>> I'm getting a syntax error on the "typedef" code line here. Any
>>>> thoughts on why? TIA
>>>>
>>>> struct CSTYPE // City/State Record
>>>> {
>>>> string csKey;// City/State "Key"
>>>> string csCity; // City
>>>> string csState; // State Code
>>>> };
>>>> typedef map<string, CSTYPE> CSINFO; // <= error here
>>>> extern CSINFO cityStInfo;
>>>> extern map<string, CSTYPE>::iterator csIter;
>>>> extern CSTYPE workCS;
>>>
>>>
>>> 1. did you #include <map> and <string>?
>>> 2. map and string live in the std:: namespace
>>> 3. Would you care to describe the specific error?
>>
>> I didn't state the error (C2143) because it's compiler-specififc
>> (VC++ 6.0) and I know that's a no-no here. 8<{{
>
> There is no reason I know of to use VC++ 6.0 when you can download
> VC++ 8.0 for free from Microsoft which is much better and up to
> date. See here. http://www.microsoft.com/express...
>

That's VC9 even, telling us that VC6 is just ancient. Don't use it
unless someone is pulling your toenails out!

Bo Persson

red floyd

11/2/2008 4:49:00 PM

James Kanze wrote:

> Like Mike, I rather suspect that he's either forgotten the
> include, and he's clearly fogotten the std::.

Just FYI, that was me, not Mike.

comp.lang.c++

typedef Syntax Error

mrc2323

red floyd

Victor Bazarov

Jeff Schwab

mrc2323

mrc2323

James Kanze

James Kanze

Jim Langston

Bo Persson

red floyd

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