Functions Error Handler Compiler
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Top of chapter Character Set Source File Encoding Data Types Top of chapter Terms Number Atom Bit Strings and Binaries Reference Fun what is error handling in java Port Identifier Pid Tuple Map List String Record Boolean Escape
Error Handling Error In Testing
Sequences Type Conversions Pattern Matching Top of chapter Pattern Matching Modules Top of chapter Module erlang error handling Syntax Module Attributes Comments module_info/0 and module_info/1 functions Functions Top of chapter Function Declaration Syntax Function Evaluation Tail recursion Built-In Functions (BIFs) Types and error handling definition Function Specifications Top of chapter The Erlang Type Language Types and their Syntax Type Declarations of User-Defined Types Type Information in Record Declarations Specifications for Functions Expressions Top of chapter Expression Evaluation Terms Variables Patterns Match Function Calls If Case Send Receive Term Comparisons Arithmetic Expressions Boolean Expressions Short-Circuit Expressions
Error Handling In Compiler Design
List Operations Map Expressions Bit Syntax Expressions Fun Expressions Catch and Throw Try Parenthesized Expressions Block Expressions List Comprehensions Bit String Comprehensions Guard Sequences Operator Precedence Preprocessor Top of chapter File Inclusion Defining and Using Macros Predefined Macros Macros Overloading Flow Control in Macros -error() and -warning() directives Stringifying Macro Arguments Records Top of chapter Defining Records Creating Records Accessing Record Fields Updating Records Records in Guards Records in Patterns Nested Records Internal Representation of Records Errors and Error Handling Top of chapter Terminology Exceptions Handling of Run-time Errors in Erlang Exit Reasons Processes Top of chapter Processes Process Creation Registered Processes Process Termination Message Sending Links Error Handling Monitors Process Dictionary Distributed Erlang Top of chapter Distributed Erlang System Nodes Node Connections epmd Hidden Nodes C Nodes Security Distribution BIFs Distribution Command-Line Flags Distribution Modules Compilation and Code Loading Top of chapter Compilation Code Loading Code Replaceme
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Erlang Try Catch
View exceptions Save to: Instapaper Pocket Readability Exceptions and Error Handling Why use exceptions? What good can using exceptions do for me? The basic answer is: Using exceptions for http://erlang.org/doc/reference_manual/errors.html error handling makes your code simpler, cleaner, and less likely to miss errors. But what's wrong with "good old errno and if-statements"? The basic answer is: Using those, your error handling and your normal code are closely intertwined. That way, your code gets messy and it becomes hard to ensure that you have dealt with all errors https://isocpp.org/wiki/faq/exceptions (think "spaghetti code" or a "rat's nest of tests"). First of all there are things that just can't be done right without exceptions. Consider an error detected in a constructor; how do you report the error? You throw an exception. That's the basis of RAII (Resource Acquisition Is Initialization), which is the basis of some of the most effective modern C++ design techniques: A constructor's job is to establish the invariants for the class (create the environment in which the member functions are to run) and that often requires the acquisition of resources, such as memory, locks, files, sockets, etc. Imagine that we did not have exceptions, how would you deal with an error detected in a constructor? Remember that constructors are often invoked to initialize/construct objects in variables: vector
Errors Exceptions Generators References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Context options and parameters Supported Protocols and http://php.net/manual/en/ref.errorfunc.php Wrappers Security Introduction General considerations Installed as CGI binary Installed http://stackoverflow.com/questions/385975/error-handling-in-c-code as an Apache module Session Security Filesystem Security Database Security Error Reporting Using Register Globals User Submitted Data Magic Quotes Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote error handling files Connection handling Persistent Database Connections Safe Mode Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Credit Card Processing Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related error handling in Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation Keyboard Shortcuts? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto search(current page) / Focus search box debug_backtrace » « Examples PHP Manual Function Reference Affecting PHP's Behaviour Error Handling Change language: English Brazilian Portuguese Chinese (Simplified) French German Japanese Korean Romanian Russian Spanish Turkish Other Edit Report a Bug Error Handling Functions See Also See also syslog(). Table of Contentsdebug_backtrace — Generates a backtracedebug_print_backtrace — Prints a backtraceerror_clea
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Error handling in C code up vote 102 down vote favorite 59 What do you consider "best practice" when it comes to error handling errors in a consistent way in a C library. There are two ways I've been thinking of: Always return error code. A typical function would look like this: MYAPI_ERROR getObjectSize(MYAPIHandle h, int* returnedSize); The always provide an error pointer approach: int getObjectSize(MYAPIHandle h, MYAPI_ERROR* returnedError); When using the first approach it's possible to write code like this where the error handling check is directly placed on the function call: int size; if(getObjectSize(h, &size) != MYAPI_SUCCESS) { // Error handling } Which looks better than the error handling code here. MYAPIError error; int size; size = getObjectSize(h, &error); if(error != MYAPI_SUCCESS) { // Error handling } However, I think using the return value for returning data makes the code more readable, It's obvious that something was written to the size variable in the second example. Do you have any ideas on why I should prefer any of those approaches or perhaps mix them or use something else? I'm not a fan of global error states since it tends to make multi threaded use of the library way more painful. EDIT: C++ specific ideas on this would also be interesting to hear about as long as they are not involving exceptions since it's not an option for me at the moment... c error-handling share|improve this question edited Nov 6 '13 at 19:09 ubershmekel 3,65513145 asked Dec 22 '08 at 10:46 Laserallan 6,71172956 add a comment| 17 Answers 17 active oldest votes up vot