News

article

Creating a .NET delegate object from an Eiffel routine

Submitted by Emmanuel Stapf on Fri, 01/15/2010 - 22:34.

Someone recently asked me how to create a .NET delegate from an Eiffel routine. Ideally it would be nice to simply do: 

	my_delegate := (agent my_routine).to_delegate

where `to_delegate' is a query from the ROUTINE class. However this feature does not yet exist.

request Make EiffelStudio a Tool for Adding Target Platforms to EiffelStudio

Posted December 18th, 2009 by DonTH B
in
0
Your rating: None

While this is likely a huge undertaking and may require architectural changes to the product, the easy addition of unsupported target platforms should exhibit the advantages of Eiffel. And because EiffelStudio has support, at the beta level, for only one platform I need to target.

article

Why doesn't it work?

Submitted by Creative Bachkhoa on Mon, 11/23/2009 - 03:33.

I start using I/O in eiffel, and my first program doesn't work. 


	make
	local
      input : PLAIN_TEXT_FILE
      output : PLAIN_TEXT_FILE
      internal : ARRAY[CHARACTER]
      i, j : INTEGER
    do
      io.putstring ("Welcome to file-io land!

article

Passback variable performance comparison

Submitted by Colin LeMahieu on Wed, 11/18/2009 - 20:49.

These tests test the allocation performance of 3 passback variable options and the subsequent access time when retrieving the value back from the calling function.

The difficulty in a general solution arises with void safety.

article

Trouble with array of linked_list elements

Submitted by Creative Bachkhoa on Wed, 11/11/2009 - 17:23.

I represent an adjacency list of graph G(V,E).

article

The rescue clause does not work

Submitted by Creative Bachkhoa on Sat, 10/31/2009 - 04:29.

I've tested the system by an example of exception handling in Eiffel 

 <eiffel>
feature {NONE} -- Initialization
	i:INTEGER
	x:REAL
	y:ARRAY[REAL]
	make
			-- Run application.
		do
			create y.make(1,2)
			io.put_string ("The item at position: ")
			io.read_integer
			i:=io.last_integer
			find
			io.put_string (" is: ")
			io.put_real (x)
			io.put_string ("%NReturn to make i

poll

Is this ok to remove conversion from STRING_32 to STRING_8?

Posted September 23rd, 2009 by Emmanuel Stapf
Yes
100% (9 votes)
No
0% (0 votes)
Total votes: 9

request Highlight current line in EiffelStudio editor

Posted September 1st, 2009 by Sami Ben Grine
in
4.22222
Your rating: None Average: 4.2 (9 votes)

The color should be configurable

This feature should be similar to: http://www.jetbrains.com/resharper/features/coding_assistance.html#Highlight_Current_Line

request Call append with manifest arrays on some container classes

Posted August 27th, 2009 by Larry Liu
in
2.4
Your rating: None Average: 2.4 (5 votes)

Consider this code fragment: 

a_list: LINKED_LIST[STRING]
...
a_list.append (<< "one", "two", "three">>)

This fails with a compilation error because {LINKED_LIST}.append only takes objects of type SEQUENCE[G], yet an array does not conform to type SEQUENCE. And in fact, I don't see any easy way of getting a manifest array into a SEQUENCE.

request Looking at two sections of a class in same editor

Posted August 27th, 2009 by Larry Liu
in
2.166665
Your rating: None Average: 2.2 (6 votes)

Eiffel Studio end users would come in handy frequently when one wants to look at another part of the code while editing. In Visual Studio one has the ability to look at two sections of code by dragging a rectangle that appears at the top of the scroll bar.

poll

Is this ok to remove conversion from REAL_64 to REAL_32?

Posted August 21st, 2009 by Emmanuel Stapf
in
Yes
100% (7 votes)
No
0% (0 votes)
Total votes: 7

request Improve the EiffelStudio's wizard with additional options

Jocelyn Fiat's picture
Posted August 5th, 2009 by Jocelyn Fiat
in
4.857145
Your rating: None Average: 4.9 (7 votes)

What about adding the following option as checkbox to the EiffelStudio's wizard: 

[x] Multithreaded capable

[x] Console application

[x] Void-safe system

[ ] Without precompilation


Maybe one can think about other option, but those are the most common settings, I often change after creating a new system with the wizard.

request feature requests and voting

Jocelyn Fiat's picture
Posted July 22nd, 2009 by Jocelyn Fiat
in
4
Your rating: None Average: 4 (4 votes)

Provide, the users, a way to request feature, and let users vote using fivestar rating system.

article

Attachment in creation features with exceptions

Submitted by Colin LeMahieu on Tue, 07/14/2009 - 21:32.

This is a short template of what one can do when dealing with the perfect storm of complication using attached variables. This issue can arise when you need to attempt to release a resource, e.g.

library

Eiffel API Wrapper

This library is a part of the EiffelStudio package
Library used to wrap external libraries
library

Eiffel i18n

This library is a part of the EiffelStudio package
Internationalization and localization Library
library

Eiffel Encoding

This library is a part of the EiffelStudio package
Encoding library.
library

Eiffel SQLite

Eiffel wrapper for the SQLite library
article

How to run eweasel in Eiffel Studio Testing Tool GUI

Submitted by Larry Liu on Thu, 04/16/2009 - 04:30.

1. Make sure you have installed Eiffel Studio 6.4 or greater.

2. Check out Eiffel SVN trunk repository and Eweasel SVN repository (https://svn.eiffel.com/eiffelstudio/trunk/eweasel)

3.

library

cURL

libcURL wrapper library for Eiffel on all major platforms