1. Sid Price
  2. Valentina Database ADK
  3. Четверг, Сентябрь 22 2016, 05:43 PM
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In my C++ application I am using the String class to pass to some Valentina methods. I am debugging the application using the VisualGDB plugin for Visual Studio 2015. The problem I have is that unlike the string class of the C++ Standard Library it does not appear possible to view the contents of these String variables with the debugger. This makes some debug operations very hard. Does anyone have a method for inspecting String object contents in a debugger?
Thanks,
Sid
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Sid Price Ответ принят
Quoting from the link you posted:

When I hover the mouse over strings while debugging, Visual Studio displays the contents of the string.


The OP who posted the question went on to say it didn't work for non-English language. A comment pointed out that it in fact does work and later the OP admitted the mistake was theirs.

What is the benefit of forcing users to use a new class (String) that has such limited features when compared to "string"? I understand the benefits of smart pointers, however, those benefits need to out-way the down side of limited debug access and lack of a full set of features in the String class.

I also realize that this is a design decision taken some time ago and that it is unlikely to change. My original question was to ask for help in improving the debugger experience. As I said earlier I am going to limkit my use of the String class to only the calls into the Valentina API that require its use.
Sid
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Ruslan Zasukhin Ответ принят
Good debugger can show UTF16 directly?

As far as I see, this is common problem

http://stackoverflow.com/questions/20960182/displaying-utf-16-strings-in-vs-debugger
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Sid Price Ответ принят
Using the Memory view is a poor solution to have to use in a really good debugger that provides facilities to read a variable by simply placing the mouse cursor over a variable. No one has to open the Memory view and drag the variable to it. In this way only one variable can be seen.

This makes the String class one I will probably avoid unless I need to send parameters to the Valentina API. This is a great pity because any extra overhead, such as converting from string to String, is to be avoided in embedded systems.

Sid
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Ruslan Zasukhin Ответ принят
String - yes it not expands, because you have release dlls, and without debug info.
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Ruslan Zasukhin Ответ принят
UChar* I am used to watch in the MEMORY window.
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Sid Price Ответ принят
I made a small test:

		String aTest = "Test String";
const UChar * ps = aTest.c_str();


Note that the UChar must be defined "const" or a cast used. The debugger shows the value of the pointer, this may be expanded and it shows the first character of the string.

		ps	0x00038b28 {0x54}	const fbl::UChar *
*ps 0x54 const fbl::UChar


However if I examine aTest" I see:

		aTest	{}	fbl::String


And no expansion is possible.
Sid
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Ruslan Zasukhin Ответ принят
May be this can help

https://msdn.microsoft.com/en-us/library/jj620914.aspx?f=255&;MSPPError=-2147217396
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Ruslan Zasukhin Ответ принят
Hi Sid,

* std::string is char* based
* String -> I_String -> String_ICU use UChar*, 2 bytes UTF16 strings.

Does Visual debugger is able show UChar* strings?
Lets assume we have just
UChar* ps = str.c_str();

What Visual Debugger will show for ps?


2) XCODE do have some feature to setup description of user-types, and in theory this should help show better this or that type. I never used this btw.

May be Visual have something like this?
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