Guide of DESIGN ERROR
N1720 -- Proposal to Add Static Assertions to the Core Language ...
The C++ language currently supports two facilities for testing software assertions:
the assert macro and the #error preprocessor directive.
The Problem The C++ language currently supports two facilities for testing software assertions: the assert macro, and the #error preprocessor directive Neither of these facilities is appropriate for use in template libraries
The #error preprocessor directive is processed too early to be of much use in this regard
In particular, the #error directive is processed before templates are instantiated, and hence cannot be used to test assertions involving template arguments
At the time that the Boost Static Assertion Library was developed, the following design requirements for a static assertion checking facility were identified: all processing must be performed during compile time -- no runtime cost in space or time is tolerable it must have simple syntax that can easily be taught to beginners assertion failure must result in a meaningful and informative diagnostic error message it can be used at namespace, class, or block scope misuse does not result in silent malfunction, but rather is diagnosed at compile time The proposal described in this paper satisfies all of these requirements
The Boost Static Assertion Library and the Loki STATIC_CHECK macro constitute two independent attempts to solve this problem without introducing a change to the specification of the core language, but each has the following inadequacies: assertion failure produces compile-time diagnostics that are typically uninformative each uses a macro (BOOST_STATIC_ASSERT, STATIC_CHECK) to generate the types that represent the assertion, and this poses namespace pollution problems The addition of static assertions to the core language would have the following effects: it would improve support for library building by allowing libraries to detect common usage errors at compile time it would make C++ easier to teach and learn by allowing C++ Standard Library implementations to detect and diagnose common usage errors it would remove embarrassments by supporting programming techniques in the core language that today rely on the preprocessor 2
Microprocessor Test Verification
5th International Workshop on Microprocessor Test and Verification. Austin, Texas,
USA; 9--10 September 2004.
Areas of Interest Validation of microprocessors and SOCs Experiences on test and verification of high performance processors and SOCs Test/verification of multimedia processors and SOCs Performance testing High-level test generation for functional verification Emulation techniques Silicon debugging Formal techniques and their applications Verification coverage Test generation at the transistor level Equivalence checking of custom circuits at the transistor level Circuit level verification Switch-level circuit modeling Timing verification techniques Path analysis for verification or test Design error models Design error diagnosis Design for testability or verifiability Optimizing SAT procedures for application to testing and formal verification Organizing Committee Finance: Jennifer Dworak (Brown Univ) Publication: Alper Sen (Freescale) Panel: Al Crouch (Inovys) Publicity: Tao Feng (Cadence) Committee: Moshe Levinger (IBM - Israel) European/Canadian Andreas Veneris (U
Software Program Managers Network - "SOFTWARE DEVELOPMENT BULLETIN"
Technical and managerial best/worst practices. Based on study of US Department
of Defense software projects.
Knowledge of industry metrics related to productivity and major consumers of cost as indicators of potential gross errors in cost estimation is lacking
ICCD 2006 INDEX IEEE INTERNATIONAL CONFERENCE ON COMPUTER DESIGN
Links to past and future meetings in the series.
info: DESIGN ERROR
Photo by www.visualexpert.com
Extensible Markup Language (XML) 1.0 (Fourth Edition)
Enables generic SGML to be served, received, and processed on the Web in the way
that is now possible with HTML. XML has been designed for ease of ...
Please report errors in this document to the public mailing list; are available
In addition, the terms defined in the following list are used in building those definitions and in describing the actions of an XML processor: error [: A violation of the rules of this specification; results are undefined
Unless otherwise specified, failure to observe a prescription of this specification indicated by one of the keywords MUST , REQUIRED , MUST NOT , SHALL and SHALL NOT is an error
Conforming software MAY detect and report an error and MAY recover from it.] fatal error [: An error which a conforming MUST detect and report to the application
After encountering a fatal error, the processor MAY continue processing the data to search for further errors and MAY report such errors to the application
In order to support correction of errors, the processor MAY make unprocessed data from the document (with intermingled character data and markup) available to the application
Once a fatal error is detected, however, the processor MUST NOT continue normal processing (i.e., it MUST NOT continue to pass character data and information about the document's logical structure to the application in the normal way).] at user option [: Conforming software MAY or MUST (depending on the modal verb in the sentence) behave as described; if it does, it MUST provide users a means to enable or disable the behavior described.] validity constraint [: A rule which applies to all XML documents
visual basic, vb, active server pages (ASP),java, javscript,c, c++ ...
Lets OOP programmers submit code for review by other programmers; many source
code samples to help educate beginners on many concepts; contests where ...
- Boris Artzybasheff -
Biography, gallery of individual works, magazine covers and product campaigns.
HTTP 404: Error Encountered - Crater Jewellery Design
Offers custom-made bead jewellery using semi-precious beads, pearls, Swarovski
crystals, sterling silver and other components.
Benefits
Photo by ec1.images-amazon.com
Bahamas Vacation Guide Error in URL Seafood, steak, appetizers and the hourly shark feedings each night you can watch
from the balconies.
Dylan Design Notes: Table of Contents Produced by the Apple Cambridge
design team after the publication of the original
Dylan Manual.
This design note requires Dylan to signal an error in such cases
It is an error if element-setter cannot successfully set the element of a sequence
This design note requires an error to be signaled in that case, preventing programs from silently returning an incorrect result or otherwise failing
This design note specifies that division by zero signals an error
Principles of good GUI Design
Describes the basic rules for all good interfaces - the cardinal dos and don'ts.
Avoid this error diligently
Reserved Icons Figure 1 Picture Meaning and Behaviour Use to Identify an Application Used to Identify a Function Reserved Word Text Label Information MessageNo Yes (identifies Information message box)None Warning MessageNo Yes (identifies Warning message box) None Question MessageNo Yes (identifies question message box)None Error MessageNo Yes (identifies error message box)None Design for Clarity GUI applications often are not clear to end users
Allow users to disable audio feedback, except in cases when an error must be addressed
Concise wording of text labels, user error messages, and one-line help messages is challenging
Choosing the appropriate control for each user task will result in higher prodtictivity, lower error rates, and higher overall user satisfaction
The application was a port from a character-based system and contains several design errors that affect the user's performance with this mission-critical application
Web design studio - web site design, database development ...
Web design and development services, including hosting. Based in Bulgaria.
DESIGN ERROR ?
Sustainable design, passive solar house HTM holistic housing ...
Passive solar, high thermal mass home plans.
Implementation of DBC
Document and source code on implementation of DBC for CLOS.
;;; ;;; Thanks to Rainer Joswig for pointing out errors and sending me ;;; notes on the design as well as MCL patches and to Douglas Thomas ;;; Crosher who found a bug in the definition of the method qualifier ;;; patterns
;;; ;;; 1998-10-12 Matthias Hoelzl ;;; * Defined error classes so that contract violations can be ;;; recognized and caught
Errors are now signalled ;;; by the method combination
Code Style: Open standards Web design with CSS, XHTML, Java ...
Articles on CSS, XHTML, JavaScript, Java servlets, and standards-oriented Web design.
Error: unfriendly error message You know you should plan and manage your site so that URL s don't change and regularly check your links, don't you? Now put a professional face on other predictable problems with, and write a friendly error message today
jContractor: Design by Contract for Java
Supports Design By Contract in Java. Discovers "contracts" during class loading
and instruments the class bytecodes on-the-fly to check run-time contract ...
If invalid data is received, it suggests an error in the input checking routine
If the expression is false, something is seriously wrong and the program should abort with an error message
What happens when a contract fails? An error is thrown when a contract fails
The type of error depends on the type of contract that failed, the options being PreconditionViolationError, PostconditionViolationError, and ClassInvariantViolationError
The program usually terminates with an error message when a contract is violated
It is possible to catch and handle these errors, but bear in mind that a contract violation means that the program has moved from its normal operating environment into No Man's Land
Collecting Error Coins
Just as nearly every family has its black sheep, virtually every coin series has
its failures. These are known as errors or mis-struck coins, ...
Error 404
Offers a wide range of gardening and landscape services. Includes details work
with prices, FAQs, before and after photographs, contact information, ...
Cannot find server or DNS Error Internet Explorer
Two Hearts Design 404 Error Page
Print and web design firm offering a list of services, a portfolio, and free clip art.
Hillside Systems - On the Design of the UNIX operating System
Satirical article written in 1984. "The UNIX system is successful because the
minimum number of keystrokes achieve the maximum effort.
In addition, the system says very little to explain errors and relies on the intelligence of the user to deduce reasons for failure
Every error message is a single letter, `?', which is just about meaningless
(OK folks, I didn't forget about the immortal TMP error message and the fact that `??' means something special.) However, only a very few commands are needed to do basic editing operations
Error messages are now wordy and it is almost possible to say that you don't need the source to find out why something happens the way it does
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