In Visual Studio / C# I can easily set programatically a break-point. Is there any similar feature available for IntelliJ/Scala-Plugin and the Scala language ?
To clarify: In C# you can call an API function
System.Diagnostics.Debugger.Break();
and then the Debugger in VS stops like with any breakpoint, set in the IDE.
I am not aware of such a feature, but in any programming environment you can get away with an adhoc solution: just define a method debugBreak, add a breakpoint to it and then use that. By example:
def debugBreak() {
println("Breakpoint hit!") // Manually set a breakpoint here
}
//.... then somwhere in your code base
if (<<some condition>>) {
debugBreak
}
That's it. Everytime the condition is met, the debugger will stop and you just need to go up the stack one frame.
As an aside, most of the time a better and simpler soluttion is to just set a conditional breakpoint in IntelliJ (essentially pasting your condition expression in the "condition" field). See https://www.jetbrains.com/idea/help/configuring-breakpoints.html.
However sometimes IntelliJ is unable to evaluate your expression, so in those cases the adhoc solution described above is a useful substitute.
Related
Does anyone know if it's possible to write an extension in Visual Studio code that can write the values in the variables window to a file after each step while in debug mode. So, a step would happen, the variable would get written to a file, another step would happen, and the next set of variables would be written. Is there anything like this out there? Can it even be done?
Here's what I have so far:
1) I created an extension in VS code, and will write my functionality in the following provided method:
function activate(context) {
let disposable = vscode.commands.registerCommand('extension.helloWorld', function () {
// Display a message box to the user
vscode.window.showInformationMessage('Hello World!');
});
2) There are some variables offered here that could be relevant (such as debugger), but they throw errors when I use them.
To explain more clearly, what I would like to do is the following: create an extension in VS code that when used launches another instance of VS code (as does every extension), and within this new instance, load a user program, debug the program step by step, and write the variables at each step of the user program to a file. This main reason for even making the extension is the last step, as VS Code doesn't have any built in functionality to do anything like this that I know of. One issue is I am not sure the 'debugger' variable in the extension (or any variables) refer to the new instance, and if there is a way to do this.
If there is a better and smarter approach, I would love to hear it.
Thank you very much everyone in advance
I'm using eclipse and want to have a "macro" that the preprocessor will replace with the name of the current method before compiling it.
I have an error reporting function, that is called as: reportthis(String errormessage) - different functions throughout the application have try/catch blocks, that call reportthis(...) from the catch block upon errors.
I'd like to be able to specify something like reportthis(MACRO_CURRENT_METHOD_NAME + ":" + e.ToString()); - where MACRO_CURRENT_METHOD_NAME will be preprocessed by eclipse before compilation and result in the name of the method where the catch {} block calls reportthis().
So if the catch{} block happens in main(), the macro should return the string "main" (or "main()", etc.).
Is this possible? how do i go about achieving my goal?
Thank you!
Edit
I wish to get this done by preprocessors in Eclipse - are those impossible? isn't it possible to perhaps write a plugin for eclipse to replace all occurrences of "MACRO_CURRENT_METHOD_NAME" with the current function name?
I've not found an automated way of doing this, so have manually added a string literal that indicates the name of the caller at each invocation of the logging code.
Nokia's S40 platform is also based on Java-ME, and I know some Nokia S40 developers have made good use of Jarrut, which is available on Sourceforge, to produce stack traces by modifying the program to track the stack. You could leverage this functionality to get the calling function name in your logging code, but you may need to modify Jarrut a bit to make that work.
Java does not support Macros.
But what you can do to determine the current method is something like
final StackTraceElement aTop = Thread.currentThread ().getStackTrace ()[1];
System.out.println (aTop.getMethodName ());
By using the element at index [1] you get the calling method, because the element at [0] is Thread.getStackTrace().
If you wrap this code in an additional method, you must adopt the array index e.g. to 2, depending on the number of wrapping methods you are using.
There is no preprocessor in java, and no macro language either.
While there are situations where either could be useful, if I understand your problem its entirely pointless, since the stack trace of the exception will already contain class and method of the place where the excetion occured.
Instead of passing a String to your "reportthis()", make a signature that just takes the exception and prints it (or just write e.printStackTrace()).
I am using C# 3.5 and Linq. I have ReSharper 6.1 on VS 2010.
For example, if I enter the following statement in the code editor:
var result = dataContext.Items.Select(i => new {Name = i.ItemName});
As soon as I type the new { it auto-completes to new string{}. Actually, not sure if it is always string or depends on the lambda. But I find I always need to delete it and back up. This happens whenever I am declaring anonymous types in a lambda.
What setting in ReSharper or VS do I need to change in order to be able to enter anonymous types using the above syntax without that occurring? Preferably, I would like to retain auto-completing in all other situations, just not this particular one as it is making an incorrect assumption as to my intent.
Resharper 6.1 added a new feature to control the way the intellisense autopopups act. Go to ReSharper->Options->Environment->IntelliSense->Autopopup and change the "After 'new'" setting to "Display but do not preselect".
While typing in Eclipse (Java) I often have the problem that when I begin to type accessors, the caret jumps down to the beginning of the constructor definition. So in a document like this:
private int mSomeInt;
public
in|public MyClass(){
}
I would like to manually type out the accessor (getter/setter) for mSomeInt, but when I press space after 'public' above, the caret jumps to the beginning of 'public MyClass'.
I often type complete lines to look up and find my methods jumbled with the constructor (like above).
Any help would be appreciated.
Note - this isn't only with accessors but rather any access modifiers that I define before the constructor or another method.
Edit
After unsuccessfully trying Deco's solution below, I've managed to narrow it down a little further.
The problem only happens if I have all the blocks in the file in a collapsed state (ctrl+shift+numPadDivide). I can see the problem is now that the new access modifier I type is then (quickly) collapsed into the below method. i.e. Eclipse is actually taking the first accessor modifier and collapsing everything from there, even though my intention is actually to write a new method.
The only solution I've been able to find is to only edit the source with all the 'fold' elements unfolded.
Under Window -> Preferences -> <Language> (e.g. Java) -> Editor there is a Content Assist menu item where you can configure auto completion and caret placement as well as auto-activation of it and the delay it uses.
Edit:
After your update to the original question I was able to successfully replicate this in Eclipse Indigo. When you have all of the code blocks collapsed it looks like Eclipse assumes that the code you are writing needs to be in that block (rather than as a variable declaration). I'm not sure if this is expected behaviour or not - but the only way around it I've found is to edit the code with the main block open, and then close it after the fact - or turn folding off altogether.
From what I can tell there are various folding plugins/addons that you can get for Eclipse which override the default behaviour and might function better? A quick Google search will be able to get you a list of them quickly.
I'd probably also suggest posting this as an issue on the Eclipse support site for their official answer.
Unfortunately this issue still exists for me in the latest Elcipse version (Kepler).
As the issue only occurs when the document is 'folded', the work around this is to either disable folding in the editor - or disable folding on 'Members' from the :
Preferences -> Java -> Editor -> Folding
I come from a Delphi and .Net background and have just started iPhone development. I just came across a problem whilst debugging.
I had the following code:
if ([displayText rangeOfString:#"."].location != NSNotFound) .....etc
I wanted to evaluate this whilst I was debugging but could not work out how to do it. I found the Expressions window and entered the below but nothing happened:
[displayText rangeOfString:#"."].location
As I'm used to Delphi & .Net (and I know XCode is a different product) its very easy to stick in variables, methods etc into a watch window and then see the result but I cannot see how to do this in XCode. Please can you tell me how I evaluate things whilst debugging??
Thanks
In your case, what you would do is at the debugger is type:
p (NSRange)[displayText rangeOfString:#"."]
You can print out the value of objects with po, but things like C structures have to be printed out with "p" and you have to cast the return types from ObjC calls to the correct struct type.
Also, just putting this in the Expressions window should result in a value:
(NSRange)[displayText rangeOfString:#"."]
In both cases you will see the whole NSRange struct, with location and length.
You can watch variables by going in the debugging drop down in the main menu on top and selecting watch variable. You can also right click and you should see the option "watch variable." Alternatively you can hover your mouse over the desired variable while stepping through your code to see its value at that time