-Darin
Darin Fisher wrote:
What header files are you including? That error indicates that the compiler knows nothing of nsDependentString.
More to the point: are you writing code that will be included in the mozilla source tree, or are you writing a mozilla extension / embedding mozilla?
If the latter case, then you should NOT be using nsDependentString. You should be using nsEmbedString instead.
-Darin
Antoine Julien wrote:
According to the Guide to the Mozilla string classes (http://mozilla.org/projects/xpcom/string-guide.html#Appendix_WhatToUse), the nsDependentString should be used when you have a const char* or const PRUnichar* buffer that you need to pass to a function that requires a nsAC?String. (am I wrong to think that?)
My situation is the following: I have a const char* string that I need to pass to a method that requires a nsAString& (that method is nsIDOMCharacterData::InsertData(PRUInt32 offset, const nsAString& arg)). However, when I try, it refuses to compile. Here's the snippet :
/************* BEGIN SNIPPET *********************************/ nsIDOMText* aTextNode ; // already initialized PRUInt32 anOffset = 1 ;
const char* mbString = "Test string" ; /* the const char* is actually a parameter of the current method */
PRUnichar* wcString = (PRUnichar*)nsMemory::Alloc(strlen(mbString)+1);
mbstowcs(wcString,mbString,strlen(mbString)) ; /* converts the char* to PRUnichar* */
aTextNode->InsertData(anOffset,nsDependentString(wcString)) ;
/************** END SNIPPET ********************************/
When I try this, I get the following error :
error C2440: 'type cast' : cannot convert from 'PRUnichar *' to 'nsDependentString'
What am I doing wrong? I've seen several places in the Mozilla code where the same operation is being done (one of the oh so many can be found at http://lxr.mozilla.org/seamonkey/source/editor/composer/src/nsEditorSpellCheck.cpp#253), I just don't see why their code works and not mine.
Thanks a lot.
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