Re: Get the button click event from another form - Managed C++/CLI Discussion Boards

Re: How do I make a managed c++ struct that will be usable in c# as an array, while still being able to be passed to unmanaged c++ as an array? [modified]

Paul Michalik3-Jun-10 2:35

Paul Michalik

3-Jun-10 2:35

You will need a "managed" equivalent of both (or at least the second one):
1. native TimePosition and
2. native array of TimePosition instances

If the mgdDataProducer sees struct TimedPosition while compiling in /clr mode, the 1st one is not necessary, I think. I am assuming here that void GetData( TimedPosition * tp, unsigned int count ) should fill an c-style array with "count" TimedPosition instances, right?

The signature of managed "GetData" would be then:

C++/CLI:

void mgdDataProducer::GetData(array<TimedPosition>^ Data, unsigned& Count);

C#:

void GetData(TimedPosition[] Data, ref uint Count);

In your implementation of mgdDataProducer::GetData, you need to transfer the content of native c++ array to a managed array (collection.. whatever). There exist several possibilities to accomplish this, I bet there are some built in interoperability helpers for transfering all native c-like or std:: sequences, although I cannot find a direct link right now.

The simplest way is to call the unmanaged DataProducer with a local c-style array, and shuffle the (there created) TimedPosition instances into the managed array. You can also write reusable wrappers for unmanaged arrays and much more, look at the keywords cli interop, marshalling or similar. I would also try to avoid PInvoke or unsafe stuff...

Cheers,

Paul

modified on Thursday, June 3, 2010 9:08 AM

Serialization problem

roshihans20-May-10 21:05

roshihans

20-May-10 21:05

I'm trying to binary serialize a 2D array using [Serializable] and ISerializable. In Special constructor for deserialization, I can't deserialize my array. I don't know what the type in info->GetValue("something", ??Type::typeid). This is my code :

[Serializable]
private ref class SerializedArrayClass : public ISerializable
{
public:
	array<array<float>^>^ jaggedArray;
	array<float, 2>^ genericArray;
	// Matrix is my other class
	Matrix^ matrixArray;

	int width;
	int height;
	int nElement;

	// Constructor
	SerializedArrayClass(int width, int height)
	{
		this->width = width;
		this->height = height;
	}

	// Init those 3 arrays
	InitArray()
	{
		// ...
	}

protected:
	// Special Constructor for deserialize
	SerializedArrayClass(SerializationInfo^ info, StreamingContext context)
	{
		this->width = safe_cast<int>(info->GetValue("width", int::typeid));
		this->height = safe_cast<int>(info->GetValue("height", int::typeid));

		// this is where the problems begin
		this->jaggedArray = safe_cast<array<array<float>^>^>>(info->GetValue("jaggedArray", ??::typeid));
		this->genericArray = safe_cast<array<float, 2>^>>(info->GetValue("genericArray", ??::typeid));
		this->matrixArray = safe_cast<Matrix^>(info->GetValue("matrixArray", ??::typeid));
	}

public:
	// For serialize
	virtual void GetObjectData(SerializationInfo^ info, StreamingContext context)
	{
		info->AddValue("width", this->width);
		info->AddValue("height", this->height);
		info->AddValue("jaggedArray", this->jaggedArray);
		info->AddValue("genericArray", this->genericArray);
		info->AddValue("matrixArray", this->matrixArray);
	}
}

What is the correct Type for 2D array and Matrix object?

Thanks,

a little help ,find a word from text

Gilbertu19-May-10 10:43

Gilbertu

19-May-10 10:43

hi guys
i use vc++2008.net and i created a form included a rich text box with a few words
and i made a (button + textfield) to help me find a word that exist in the rich text box,but i dont know what is the code to help me?

and thank u all ..

Re: a little help ,find a word from text

Luc Pattyn19-May-10 14:05

Luc Pattyn

19-May-10 14:05

Hi,

the RichTextBox class has a Find() method, so I suggest you read up on it for starters.

Smile | :)

Luc Pattyn [Forum Guidelines] [Why QA sucks] [My Articles]

I only read formatted code with indentation, so please use PRE tags for code snippets.

I'm not participating in frackin' Q&A, so if you want my opinion, ask away in a real forum (or on my profile page).

Re: a little help ,find a word from text

T210215-Jun-10 21:26

T2102

15-Jun-10 21:26

Access the text. If it's System::String, then you can use the IndexOf and Substring methods. Note that this is more than 10 times slower than C/C++ functions for very large strings, which is what I found out today when I rewrote a block of code to see if unmanaged version would be faster than the managed version for immutable System::String type.

Get the button click event from another form

rikterveen18-May-10 20:46

rikterveen

18-May-10 20:46

I'm struggling for a couple of days now. i have two forms,
The main form and some popup form with textboxes.

I open the popupform from the mainform then fill in some information on
the popupform and send it with a button. When that button is clicked
the mainform has to detect it and grab the data from the popupform before closing it.

but so far i'm not able to get that click event from the popupform
i tried the following which will compile but does nothing:

rowpopup^ popup = gcnew rowpopup();
popup->button_savetoform->Click += gcnew EventHandler(this, &Main::add_new_item);

I got some advice to work with delegates and after a lot of reading and googling
i still couldn't find how to use it in this situation.

Does anyone have an idea?

Re: Get the button click event from another form

Andreoli Carlo18-May-10 21:56

Andreoli Carlo

18-May-10 21:56

the code you write is actually....working....so...if you write here or post as attachment the full code i will check what's wrong Smile | :)

Re: Get the button click event from another form

rikterveen20-May-10 7:16

rikterveen

20-May-10 7:16

OK, i wrote a little test program which does the same.

#pragma once

#include "form2.h"

namespace Test2 {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
		}

	protected:
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: System::Windows::Forms::Button^  testbutton;
	private: System::Windows::Forms::Label^  testlabel;
	private: System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code


	public:
		void InitializeComponent(void)
		{
			this->testbutton = (gcnew System::Windows::Forms::Button());
			this->testlabel = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();

			/* Testbutton */
			this->testbutton->Location = System::Drawing::Point(12, 326);
			this->testbutton->Name = L"button_test";
			this->testbutton->Size = System::Drawing::Size(75, 23);
			this->testbutton->TabIndex = 0;
			this->testbutton->Text = L"Test";
			this->testbutton->UseVisualStyleBackColor = true;
			this->testbutton->Click += gcnew System::EventHandler(this, &Form1::testbutton_click);
			// 
			// testlabel
			// 
			this->testlabel->AutoSize = true;
			this->testlabel->Location = System::Drawing::Point(9, 19);
			this->testlabel->Name = L"label_test";
			this->testlabel->Size = System::Drawing::Size(35, 13);
			this->testlabel->TabIndex = 1;
			this->testlabel->Text = L"";
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(382, 361);
			this->Controls->Add(this->testlabel);
			this->Controls->Add(this->testbutton);
			this->Name = L"Form1";
			this->Text = L"Form1";
			this->ResumeLayout(false);
			this->PerformLayout();

			/*  Code form the button on other form */
			Form2^ popup = gcnew Form2();
			popup->button_send->Click += gcnew System::EventHandler(this, &Form1::raised_event);

		}
	private:
#pragma endregion




	private: System::Void testbutton_click(System::Object^  sender, System::EventArgs^  e) {
				 testlabel->Text = "new form open";

				 Form2^ popup = gcnew Form2();
				 popup->ShowDialog();
			 }

	private: void raised_event (System::Object^  sender, System::EventArgs^  e)
			 {
				 /* Get the text from the textbox on the other form */
				 Form2^ popup = gcnew Form2();
				 testlabel->Text = popup->textbox->Text;
			 }
	};
}

Form2

#pragma once


using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;


namespace Test2 {
	public ref class Form2 : public System::Windows::Forms::Form
	{
	public:
		Form2(void)
		{
			InitializeComponent();
		}

	protected:
		~Form2()
		{
			if (components)
			{
				delete components;
			}
		}
	public: System::Windows::Forms::RichTextBox^  textbox;
	protected: 
	public: System::Windows::Forms::Button^  button_send;

	protected: 

	private:
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		void InitializeComponent(void)
		{
			this->textbox = (gcnew System::Windows::Forms::RichTextBox());
			this->button_send = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// textbox
			// 
			this->textbox->Location = System::Drawing::Point(12, 12);
			this->textbox->Name = L"textbox";
			this->textbox->Size = System::Drawing::Size(268, 147);
			this->textbox->TabIndex = 0;
			this->textbox->Text = L"";
			// 
			// button_send
			// 
			this->button_send->Location = System::Drawing::Point(12, 165);
			this->button_send->Name = L"button_send";
			this->button_send->Size = System::Drawing::Size(75, 23);
			this->button_send->TabIndex = 1;
			this->button_send->Text = L"Send";
			this->button_send->UseVisualStyleBackColor = true;
			// 
			// Form2
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(292, 198);
			this->Controls->Add(this->button_send);
			this->Controls->Add(this->textbox);
			this->Name = L"Form2";
			this->Text = L"Form2";
			this->Load += gcnew System::EventHandler(this, &Form2::Form2_Load);
			this->ResumeLayout(false);

		}
#pragma endregion
	private: System::Void Form2_Load(System::Object^  sender, System::EventArgs^  e) {
				 textbox->Text = "hoi";

			 }
	};
}

Re: Get the button click event from another form [modified]

Andreoli Carlo20-May-10 23:14

Andreoli Carlo

20-May-10 23:14

so....here we are:

in form 1 substitute:

private: System::Void testbutton_click(System::Object^  sender, System::EventArgs^  e) {
				 testlabel->Text = "new form open";

				 Form2^ popup = gcnew Form2();
				 popup->ShowDialog();
			 }

	private: void raised_event (System::Object^  sender, System::EventArgs^  e)
			 {
				 /* Get the text from the textbox on the other form */
				 Form2^ popup = gcnew Form2();
				 testlabel->Text = popup->textbox->Text;
			 }
	};

// susbstitute with.....

private: 
	Form2^ popup;
	void testbutton_click(System::Object^  sender, System::EventArgs^  e) {
				 testlabel->Text = "new form open";

				 popup = gcnew Form2();
				 popup->button_send->Click += gcnew EventHandler(this, &Form1::raised_event);
				 popup->ShowDialog();
			 }

	void raised_event (System::Object^  sender, System::EventArgs^  e)
			 {
				 testlabel->Text = popup->textbox->Text;
			 }

i'm pretty sure you'll understand my changes.

Maybe it would be better to use delegates....i'll write you some code for that

// form 1/////////////////////////////////////////////////////////
#pragma once
#include "Form2.h"

namespace delete1 {

	using namespace System;
	using namespace System::ComponentModel;
	using namespace System::Collections;
	using namespace System::Windows::Forms;
	using namespace System::Data;
	using namespace System::Drawing;

	public ref class Form1 : public System::Windows::Forms::Form
	{
	public:
		Form1(void)
		{
			InitializeComponent();
		}

	protected:
		~Form1()
		{
			if (components)
			{
				delete components;
			}
		}
	private: 
		void testbutton_click(System::Object^  sender, System::EventArgs^  e) {
			testlabel->Text = "new form open";

			Form2^ popup = gcnew Form2();
			popup->myPersonalDelegateCl += gcnew Form2::myPersonalDelegate(this,&Form1::raised_from_delegate);
			popup->ShowDialog();
		}
		void raised_from_delegate (String ^txt)
		{
			this->testlabel->Text=txt;
		}
		System::Windows::Forms::Button^  testbutton;
		System::Windows::Forms::Label^  testlabel;
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		void InitializeComponent(void)
		{
			this->testbutton = (gcnew System::Windows::Forms::Button());
			this->testlabel = (gcnew System::Windows::Forms::Label());
			this->SuspendLayout();

			/* Testbutton */
			this->testbutton->Location = System::Drawing::Point(12, 326);
			this->testbutton->Name = L"button_test";
			this->testbutton->Size = System::Drawing::Size(75, 23);
			this->testbutton->TabIndex = 0;
			this->testbutton->Text = L"Test";
			this->testbutton->UseVisualStyleBackColor = true;
			this->testbutton->Click += gcnew System::EventHandler(this, &Form1::testbutton_click);
			// 
			// testlabel
			// 
			this->testlabel->AutoSize = true;
			this->testlabel->Location = System::Drawing::Point(9, 19);
			this->testlabel->Name = L"label_test";
			this->testlabel->Size = System::Drawing::Size(35, 13);
			this->testlabel->TabIndex = 1;
			this->testlabel->Text = L"";
			// 
			// Form1
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(382, 361);
			this->Controls->Add(this->testlabel);
			this->Controls->Add(this->testbutton);
			this->Name = L"Form1";
			this->Text = L"Form1";
			this->ResumeLayout(false);
			this->PerformLayout();
		}
#pragma endregion
	};
}

// form 2/////////////////////////////////////////////////////////
#pragma once
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;

namespace Test2 {
	public ref class Form2 : public System::Windows::Forms::Form
	{
	public:
		Form2(void)
		{
			InitializeComponent();
		}
		delegate void myPersonalDelegate(String ^txt);
		myPersonalDelegate^ myPersonalDelegateCl;
	protected:
		~Form2()
		{
			if (components)
			{
				delete components;
			}
		}
	private:
		void Form2_Load(System::Object^  sender, System::EventArgs^  e) {
			 textbox->Text = "hoi";
		}
		void button_send_Click(System::Object^  sender, System::EventArgs^  e) {
			 this->myPersonalDelegateCl(this->textbox->Text);
		}
		System::Windows::Forms::RichTextBox^  textbox;
		System::Windows::Forms::Button^  button_send;
		System::ComponentModel::Container ^components;

#pragma region Windows Form Designer generated code
		void InitializeComponent(void)
		{
			this->textbox = (gcnew System::Windows::Forms::RichTextBox());
			this->button_send = (gcnew System::Windows::Forms::Button());
			this->SuspendLayout();
			// 
			// textbox
			// 
			this->textbox->Location = System::Drawing::Point(12, 12);
			this->textbox->Name = L"textbox";
			this->textbox->Size = System::Drawing::Size(268, 147);
			this->textbox->TabIndex = 0;
			this->textbox->Text = L"";
			// 
			// button_send
			// 
			this->button_send->Location = System::Drawing::Point(12, 165);
			this->button_send->Name = L"button_send";
			this->button_send->Size = System::Drawing::Size(75, 23);
			this->button_send->TabIndex = 1;
			this->button_send->Text = L"Send";
			this->button_send->UseVisualStyleBackColor = true;
			this->button_send->Click += gcnew System::EventHandler(this, &Form2::button_send_Click);
			// 
			// Form2
			// 
			this->AutoScaleDimensions = System::Drawing::SizeF(6, 13);
			this->AutoScaleMode = System::Windows::Forms::AutoScaleMode::Font;
			this->ClientSize = System::Drawing::Size(292, 198);
			this->Controls->Add(this->button_send);
			this->Controls->Add(this->textbox);
			this->Name = L"Form2";
			this->Text = L"Form2";
			this->Load += gcnew System::EventHandler(this, &Form2::Form2_Load);
			this->ResumeLayout(false);
		}
#pragma endregion
	};
}

ps1 alway split code in .h and in .cpp
ps2 don't ever write personalized code between #pragma region Windows Form Designer generated code and #pragma endregion

modified on Friday, May 21, 2010 5:27 AM

Re: Get the button click event from another form

rikterveen27-May-10 20:44

rikterveen

27-May-10 20:44

The delegate works perfect Thank you Thumbs Up | :thumbsup:

the other code raised the event but didn't get the information from the textbox.
so i'll study the delegate.

Just one quiestion you changed the namespace of Form1 this results in compiler errors.
is there a reason you did this?

Re: Get the button click event from another form

Andreoli Carlo31-May-10 12:01

Andreoli Carlo

31-May-10 12:01

it was just the name i used...so no reason for that

Re: Get the button click event from another form

voo doo125-Jun-10 6:24

voo doo12

5-Jun-10 6:24

there is simplest way if you are still enterested

not able to built project in release mode

sharada veena17-May-10 19:26

sharada veena

17-May-10 19:26

Hi ,
when i am trying to build managed c++ project in visual studio .net 2003 , i am getting this kind of
description in output window,and not able to generate .exe.

Microsoft (R) .NET Resource Generator
[Microsoft .Net Framework, Version 1.1.4322.2443]
Copyright (C) Microsoft Corporation 1998-2002. All rights reserved.
Usage:
ResGen inputFile.ext [outputFile.ext]
ResGen /compile inputFile1.ext[,outputFile1.resources] [...]
Where .ext is .resX, .txt, or .resources
Converts files from one resource format to another. If the output
filename is not specified, inputFile.resources will be used.
The /compile option takes a list of .resX or .txt files to convert to
.resources files in one bulk operation, replacing .ext with .resources for
the output file name.
.txt files have this format:

# Use # at the beginning of a line for a comment character.
name=value
more elaborate name=value

and I am getting warnings like this

XtendedMenu warning LNK4099: PDB 'libc.pdb' was not found with 'C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\nochkclr.obj' or at 'D:\HandHelld\projects\SVNRep-HandHeld\Trunk\QCID\Source\QCID\WIN\QCID\Release\libc.pdb'; linking object as if no debug info
NetSegmentedProgressControl warning LNK4099: PDB 'libc.pdb' was not found with 'C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\nochkclr.obj' or at 'D:\HandHelld\projects\SVNRep-HandHeld\Trunk\QCID\Source\QCID\WIN\QCID\Release\libc.pdb'; linking object as if no debug info
NetSRPControl warning LNK4210: .CRT section exists; there may be unhandled static initializers or terminators
NetSRPControl warning LNK4099: PDB 'libc.pdb' was not found with 'C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\nochkclr.obj' or at 'D:\HandHelld\projects\SVNRep-HandHeld\Trunk\QCID\Source\QCID\WIN\QCID\Release\libc.pdb'; linking object as if no debug info
NetBarGraphControl warning LNK4210: .CRT section exists; there may be unhandled static initializers or terminators
NetBarGraphControl warning LNK4099: PDB 'libc.pdb' was not found with 'C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\lib\nochkclr.obj' or at 'D:\HandHelld\projects\SVNRep-HandHeld\Trunk\QCID\Source\QCID\WIN\QCID\Release\libc.pdb'; linking object as if no debug info

The application is not generating .resources files in release build, where as in Debug build , i am getting same warnings ,still able to generate .exe. In release build not able to generate exe and resource files (.resources from .resx)

Any help is greatly appreciated.

Thanks,
sharada veena.

help vc++.net

Gilbertu17-May-10 0:22

Gilbertu

17-May-10 0:22

hello
i have to deliver a project to the doctor and i need a simple program or rich example in vc++.net please

& thank u all

Re: help vc++.net

Richard MacCutchan17-May-10 1:26

Richard MacCutchan

17-May-10 1:26

Nobody here has the time to do your work for you. If you need a sample of some type of coding then look at the articles here on CodeProject and also use Google/Bing to search the internet.

It's time for a new signature.

[] symbol appears in string when reading from / writing to file

KlaasVersteeg16-May-10 23:57

KlaasVersteeg

16-May-10 23:57

Hi,

I have written a piece of code to save data from a Windows form in a file, and to read it from the file back into the Windows form. This works fine on the computer on which I've written the code (Windows 7). However, now I try to run the program on another computer (Windows XP), and a strange thing happens: when I read the data from the file, a rectangle character appeard at the end of each line.

When I write the data to the file, another such character is written to the file. So every time I save and read a file, an extra rectangle character is added. I'm using streamwriter / streamreader for the file input / output. Any idea how to prevent this strange behaviour?

Sizeof out of scope?

Xpnctoc8-May-10 6:39

Xpnctoc

8-May-10 6:39

Can someone tell me how to use sizeof() during debugging by any means at all (watch, immediate window, etc...)? All I keep getting are stupid error messages. For instance, in the Immediate window I typed:

? sizeof(bool)

which gave me the message

error: identifier 'sizeof' out of scope

I can't seem to find documentation for this anywhere.

Thanks.

Re: Sizeof out of scope?

Michel Godfroid8-May-10 8:48

Michel Godfroid

8-May-10 8:48

In C#, and in C++, sizeof is an operator, and not a function. It is something that is calculated at compile-time, and not at run-time. As such, the debugger does not know the sizeof operator, as it is a language-specific way of expressing an operator.
The way your type your expression, the debugger will interpret it as:
Call Debug.Print(sizeof(bool))
Since the sizeof function does not exist, you get an out of scope error message.

Re: Sizeof out of scope?

Richard MacCutchan8-May-10 8:59

Richard MacCutchan

8-May-10 8:59

Xpnctoc wrote:
All I keep getting are stupid error messages.

On the contrary, you are getting helpful error messages. You just need to use the information to help you figure out what is happening.

It's time for a new signature.

Re: Sizeof out of scope?

Xpnctoc8-May-10 17:54

Xpnctoc

8-May-10 17:54

I have never done this before, but I'm going to have to disagree with nearly everything that has been put forth in the responses so far.

I created a new scratch C++/CLI project to see if there was a problem in the way my other C++ project was configured. However, using sizeof in the Immediate window continues to produce the "out of scope" error.

Then I created a new scratch C# project to put Michel's response to the test. When I type

? sizeof(bool)

in the Immediate window, it returns an output of "1". So whatever is going on with "sizeof" in C++/CLI is not extendable to C#.

Regarding Richard's comment about me calling the "out of scope" message stupid, I'm going to stand by what I said. "Sizeof" -- especially if Michel is right calling it an operator rather than a function -- is part of the language. It's not some custom function of some special class where an extra reference is needed. So how can it ever be out of scope? In that regard, the message makes no sense. Therefore it is utterly unhelpful. That makes it, IMHO, fully deserving of the label "stupid".

Re: Sizeof out of scope?

Michel Godfroid8-May-10 20:15

Michel Godfroid

8-May-10 20:15

I still stand by my answer. In c#, the debugger can use the .Net compiler support libraries to compile your statement on the fly. In native code, there is no such thing.
I must admit that I've never tried it in C#, but in unmanaged C++, this behaviour is 'expected'.
Whether to label it stupid, is is entirely up to you.

Re: Sizeof out of scope?

Xpnctoc9-May-10 12:18

Xpnctoc

9-May-10 12:18

But I'm not dealing with strictly unmanaged C++ anyway. My project is a "mixed mode" C++/CLI project. By definition, the project has to be .NET-aware. And the breakpoint that I set was actually in a managed code section (i.e., in one of the Windows Forms event handlers). So why can't it use the same .NET compilation support as C#?

Even if the project was 100% unmanaged, the compiler still has to convert a sizeof call into a useable via some kind of library. Why can't the debugger make use of that part of the compiler?

I don't label the problem itself as "stupid". I obviously don't understand it and was trying to get some clarification. What I do label as "stupid" is the "out of scope" error message. It just seems to me that there has to be a lot better/more helpful wording for when this error condition is encountered -- something like:

"'Sizeof' operator is unsupported in debugging."

If they had a truly informative error message like that, I wouldn't have had to start this post to begin with. It still wouldn't answer the "why" questions, but at least it would be a lot less cryptic than some vague "out of scope" message. After all, if sizeof is an operator rather than a function as you originally suggested, how the heck can an operator -- a built-in part of the language -- be out of scope?

Re: Sizeof out of scope?

Richard MacCutchan9-May-10 22:12

Richard MacCutchan

9-May-10 22:12

Xpnctoc wrote:
the compiler still has to convert a sizeof call into a useable via some kind of library.

No it merely calculates the size of the operand and puts the resulting value in the object code. There is no associated library call because sizeof() is an operator, just like +.

Xpnctoc wrote:
If they had a truly informative error message

I think this rant should be directed at Microsoft.

It's time for a new signature.

Re: Sizeof out of scope?

Xpnctoc10-May-10 4:30

Xpnctoc

10-May-10 4:30

Richard MacCutchan wrote:
No it merely calculates the size of the operand and puts the resulting value in the object code. There is no associated library call because sizeof() is an operator, just like +.

And yet other operators like + and == are fully accessible within the Immediate window. You said it yourself... there is no associated library because sizeof is an operator. How can any operator -- an integral part of the language -- ever be out of scope? I mean, wouldn't it strike you as really messed up if suddenly you got an error message saying + was "out of scope"?

If 'sizeof' is only evaluated at compile time and treated as a constant in the executable, and Immediate cannot access it as part of the available evaluation syntax, then it seems to me 'sizeof' would be better termed as a MACRO than an operator -- just like using the #define precompiler directive.

Re: Sizeof out of scope?

Richard MacCutchan10-May-10 5:15

Richard MacCutchan

10-May-10 5:15

Well, you are right in all you say and I am (partly) wrong. My biggest mistake was to take your query at face value, rather than checking what results I get. I have just tested this by adding sizeof(variable) in my watch window while debugging and it shows the correct value. So, we go back to the original problem that you are seeing: where exactly, and under what conditions, are you typing your query?

It's time for a new signature.

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