I get errors compiling the code below when ugrading from VS 2008 to VS2015. The code is from the com4j project. Help wanted. Thanks!
syntax error: missing ';' before '<' missing type specifier
int assumed. Note: C++ does not support default-int
'array': ambiguous symbol
unexpected token(s) preceding ';'
Code:
// Class to marshal SAFEARRAY to Java multi dimensional array
//
// itemType : array item type
// XDUCER : converter for each array item
template < VARTYPE itemType, class XDUCER >
class ToJavaMultiDimlArrayMarshaller {
typedef array::Array<typename XDUCER::JavaType> JARRAY; // Errors here
typedef SAFEARRAY* NativeType;
typedef jarray JavaType;
What does VARTYPE stand for? Is it a macro? Replacing with class or typename may help
Related
I have this C++11 code:
using swallow = int[];
but MSVS2013 Preview barfs on it:
error C2143: syntax error : missing ';' before '='
So I tried
typedef int[] swallow;
But that got me:
warning C4091: 'typedef ' : ignored on left of 'int' when no variable is declared
So I tried reversing the typedef stuff, as I never remember (hence the reason using is so great):
typedef swallow int[];
And got:
m:\development\source\ambrosia\libambrosia\Ambrosia/utility.h++(33) : error C2144: syntax error : 'int' should be preceded by ';'
I'm already disappointed in MSVS2013. How can I write this so the MS compiler will understand this simple code?
typdef is a declaration, and follows the same syntax as a declaration:
extern int a[];
typedef int b[];
(Note that b is an incomplete type, and that a is only declared, not defined.)
I want to create a list of stacks in C++ but the compiler gives me some error messages:
#include <list>
#include <stack>
class cName
{
[...]
list<stack> list_stack;
[...]
}
Errors:
error C2143: syntax error : missing ';' before '<'
error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
error C2238: unexpected token(s) preceding ';'
std::stack is a template, you need to use it with template arguments. For sample:
class cName
{
typedef int ConcreteType;
std::list<stack<ConcreteType> > list_stack;
^^^^ use it with real type
};
Stacks are also templated, so it should be
list<stack <...> > list_stack;
If you want your stack to handle just one type, for example int, change stack in your code to int:
list<int> list_stack;
Otherwise you should create your own template type instead of using stack:
template <class T>
class List
{
list<T> list_stack;
T top();
void push(T v);
};
I use Visual Studio 2005
When I compile, I get this error:
Error 1 error C2146: syntax error : missing ';' before identifier 'mDropEndTime'
Error 2 error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
struct MB_SYN_DROPITEM_UPDATE : MSGBUF
{
long mCid; // Index
unsigned long mItemIdx; // idx
TIMESTAMP_STRUCT mDropEndTime; // This is error line
};
Why doesn't C++ know TIMESTAMP_STRUCT?
TIMESTAMP_STRUCT is something defined in sqlext.h
You must add
#include <sqlext.h>
Because TIMESTAMP_STRUCT is not part of the C++ standard.
I was implementing boost::intrusive for one of my project on visual C++ 2008 and i stumbled upon a problem. i am using splay hooks for splay_multiset containers. I have defined splay hook publically under MyClass (code below).
#include <boost/intrusive/unordered_set.hpp>
#include <boost/intrusive/splay_set.hpp>
#include <iostream>
using namespace boost::intrusive;
class MyClass
{
int int_;
public:
MyClass(int i)
: int_(i)
{}
splay_set_member_hook<link_mode<normal_link> > memberSplayHook;
//**OPTION-1**
//PROBLEM CODE SEGMENT ++
//typedef member_hook<MyClass, splay_set_member_hook<link_mode<normal_link> >, &MyClass::memberSplayHook> MemberOption;
//typedef splay_multiset<MyClass, MemberOption> MemberMultiSet;
//PROBLEM CODE SEGMENT --
MemberMultiSet mmset;
};
//**OPTION-2**
//WORKING CODE SEGMENT ++
typedef member_hook<MyClass, splay_set_member_hook<link_mode<normal_link> >, &MyClass::memberSplayHook> MemberOption;
typedef splay_multiset<MyClass, MemberOption> MemberMultiSet;
//WORKING CODE SEGMENT --
int main()
{
return 0;
}
The problem is, to use splay_multiset, whatever option i choose (either option-1 or 2, mention in code), in both cases i see compilation errors.
When Option-1 is enabled (option-2 is commented), i see errors below:
1>d:\projects\sampleproject\sample.cpp(21) : error C2327: 'MyClass::memberSplayHook' : is not a type name, static, or enumerator
1>d:\projects\sampleproject\sample.cpp(21) : error C2065: 'memberSplayHook' : undeclared identifier
1>d:\projects\sampleproject\sample.cpp(22) : error C3203: 'member_hook' : unspecialized class template can't be used as a template argument for template parameter 'O1', expected a real type
While, when Option-2 is enabled (option-1 is commented out), i dont see undeclared identifier error msg as these errors coming with option-1. But i do see errors like below (which are obvious).
1>d:\projects\sampleproject\sample.cpp(25) : error C2146: syntax error : missing ';' before identifier 'mmset'
1>d:\projects\sampleproject\sample.cpp(25) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
My question is why i am getting error in first case? What can i do to get pass this issue?
Boost member hooks have (always?) been broken, since they don't compile with Visual C++.
I don't have a VS at hand to check for the precise error message so I might be wrong (but reading 'member hooks' and 'Visual C++' always triggers 'there's a problem'-mode), but do try to check this:
http://permalink.gmane.org/gmane.comp.lib.boost.user/56875
EDIT: Don't take the headline literally -- the same applies to Visual C++ 2010 and 2012. All my member hooks use this workaround; at some point I might even try to understand what it does, or more importantly, how to package it into a more comfortable setup for less "I need to find a previous implementation of this workaround so I can copy-and-modify it"...
I just reorganized the code for a project and now I'm getting errors I can't resolve. This header is included by a .cpp file trying to compile.
#include "WinMain.h"
#include "numDefs.h"
#include <bitset>
class Entity
{
public:
Entity();
virtual ~Entity();
virtual bitset<MAX_SPRITE_PIXELS> getBitMask();
virtual void getMapSection(float x, float y, int w, int h, bitset<MAX_SPRITE_PIXELS>* section);
};
I'm getting these compiler errors for the declaration of Entity::getBitMask():
error C2143: syntax error : missing ';' before '<'
error C2433: 'Entity::bitset' : 'virtual' not permitted on data declarations
error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
error C2238: unexpected token(s) preceding ';'
There are more similar errors for the next line as well. It seems like bitset isn't getting included but it clearly is? I can't figure out what's going wrong. WinMain.h includes windows.h, and numDefs.h includes nothing.
Using MS Visual C++ 2008.
Declare the bitset as std::bitset<MAX_SPRITE_PIXELS>.
The bitset template is defined in the std:: namespace, so you either need to reference it by it's full name std::bitset or add using namespace std; somewhere before the class declaration.
I think you need to say std::bitset.
Looks like an error in "numDefs.h"