FIX: Manipulator Causes C1001 IC Error in MSC1.CPP Line 1056
ID: Q131312
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The information in this article applies to:
-
Microsoft C/C++ Compiler (CL.EXE), included with:
-
Microsoft Visual C++ 32-bit Edition, versions 2.0, 2.1
SYMPTOMS
The compiler generates the following compiler error:
fatal error C1001: INTERNAL COMPILER ERROR
( compiler file 'msc1.cpp', line 1056 )
This occurs when the code meets both of these conditions:
- It contains a function template that overwrites the << operator
(insertion operator) or the >> operator (extraction operator) for class
ostream. For example:
template <class T> ostream& operator<<( ostream&, T& ); //or
template <class T> istream& operator>>( istream&, T& );
- It contains an expression of the form:
iostream_specifier insertion/extraction_operator manipulator
For example:
cout << endl; // fails if template operator << was defined
cout << flush; // fails if template operator << was defined
cin >> ws; // fails if template operator >> was defined
RESOLUTION
The problem does not occur if an identifier of any type is inserted into
the expression. For example, if 'a' is a variable (of any type):
cout << a << endl; // does not fail
cout << '\n' << flush; // does not fail
cin >> a >> ws; // does not fail
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed
at the beginning of this article. This problem was fixed in Microsoft
Visual C++, 32-bit Edition, version 4.0.
MORE INFORMATION
To demonstrate the workaround, change the lines marked "internal
compiler error" into comments.
Sample Code to Demonstrate Problem
/* Compile options needed: none
*/
#include <iostream.h>
#include <strstrea.h>
template <class T> ostream& operator<< ( ostream&, T& );
template <class T> istream& operator>> ( istream&, T& );
void x(ostrstream &ot)
{
int a;
cout << endl; // internal compiler error
ot << flush; // internal compiler error
cin >> ws; // internal compiler error
cout << "test" << endl; // no error
ot << '\n' << flush; // no error
cin >> a >> ws; // no error
}
Additional query words:
9.00 9.0 2.00 2.10 9.10 9.1
Keywords :
Version : :2.0,2.1
Platform : NT WINDOWS
Issue type :