[Swig-devel] [ swig-Bugs-1630855 ] Error C2026 when creating long NotImplementedError message

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Bugs item #1630855, was opened at 2007-01-08 11:51
Message generated for change (Comment added) made by brzrkr0
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Category: python
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Casey Raymondson (brzrkr0)
Assigned to: Marcelo Matus (marcelomatus)
Summary: Error C2026 when creating long NotImplementedError message

Initial Comment:
When wrapping an overloaded function with Python, SWIG 1.3.31 creates an error message that will be displayed if a Python program calls the function with an invalid list of arguments.  For example, the error message might say:

NotImplementedError: Wrong number of arguments for overloaded function 'new_Overloaded'.
  Possible C/C++ prototypes are:
    Overloaded(int)
    Overloaded(int,int)
    Overloaded(int,int,int)

If the function has a large number of possible prototypes, it is possible for this error message string to exceed 2048 characters.  If the string exceeds this length, the _wrap.cxx file generated by SWIG can no longer compile in Visual Studio .NET 2003, because the compiler returns "Compiler Error C2026: string too big, trailing characters truncated" upon seeing a string literal greater than 2048 characters.

As a workaround, I have modified line 1509 of Source/Modules/python.cxx in my local copy of SWIG 1.3.31.

Old version of line 1509:
	Printf(protoTypes, "    %s(%s)\\n", Getattr(sibl, "name"), ParmList_protostr(Getattr(sibl, "wrap:parms")));

New version of line 1509:
	Printf(protoTypes, "\"\"    %s(%s)\\n", Getattr(sibl, "name"), ParmList_protostr(Getattr(sibl, "wrap:parms")));

This separates the error message string into multiple string literals in the generated _wrap.cxx file, and Visual Studio .NET 2003 is now able to compile _wrap.cxx with no problems.

Should this change be applied to the SWIG repository?


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>Comment By: Casey Raymondson (brzrkr0)
Date: 2007-05-22 13:46

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I have submitted a patch (1723770) for this to the patches area:
https://sourceforge.net/tracker/index.php?func=detail&aid=1723770&group_id=1645&atid=301645


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Comment By: Aloys (aloys_baillet)
Date: 2007-05-19 23:41

Message:
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Hi,

I'm having the same exact problem for python AND Java.
I think I will have to apply this fix locally as well.
Would be good to have it in the standard SWIG.

Cheers

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You can respond by visiting: 
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