Editing
Error Handling (Elixir)
Jump to navigation
Jump to search
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
== Error Handling in Elixir == Error handling is an essential aspect of any programming language, including Elixir. Elixir provides a robust and flexible error handling mechanism that allows developers to handle and manage errors effectively. === The `try` and `rescue` Statements === In Elixir, you can use the `try` and `rescue` statements to handle errors. The `try` statement is used to enclose a block of code that may raise an error, while the `rescue` statement is used to handle the raised error. Here's an example of using `try` and `rescue` statements in Elixir: ``` try do # code that may raise an error rescue # handle the error end ``` === Catching Specific Exceptions === In addition to the general `rescue` statement, Elixir allows you to specify specific exceptions to catch. This gives you more control over how different types of errors are handled. The syntax for catching specific exceptions in Elixir is as follows: ``` try do # code that may raise an error rescue exception_type1 -> # handle exception_type1 exception_type2 -> # handle exception_type2 end ``` === The `throw` and `catch` Statements === In Elixir, you can also use the `throw` and `catch` statements to raise and catch exceptions, respectively. Unlike the `try` and `rescue` statements, which are generally used for expected errors, `throw` and `catch` are more suitable for exceptional situations. Here's an example of using `throw` and `catch` statements in Elixir: ``` catch :exception_type do # code that may throw an exception of :exception_type end ``` === Error Propagation === Elixir promotes the idea of error propagation rather than error handling. This means that rather than handling the error immediately, you can choose to propagate the error up the call stack until it reaches a point where it can be handled effectively. === Supervisors and Error Recovery === In Elixir, supervisors play a crucial role in error recovery and fault tolerance. Supervisors are responsible for starting, monitoring, and restarting child processes, which helps in isolating and managing errors in a scalable manner. For more information on supervisors and error recovery in Elixir, please refer to the [[Supervisors (Elixir)|Supervisors]] article. === Conclusion === Error handling is a fundamental part of software development, and Elixir provides many mechanisms to handle errors effectively. Whether you choose to use the `try` and `rescue` statements, the `throw` and `catch` statements, or leverage supervisors for error recovery, Elixir has you covered. For more information on error handling and related topics in Elixir, please explore the articles linked below: * [[Supervisors (Elixir)|Supervisors]] * [[Error Propagation (Elixir)|Error Propagation]] * [[Exception Types (Elixir)|Exception Types]] * [[Logging (Elixir)|Logging]] Remember, thorough error handling can greatly improve the reliability and robustness of your Elixir applications. {{Elixir}} {{Programming language topics}}
Summary:
Please note that all contributions to Elixir Wiki may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see
Elixir Wiki:Copyrights
for details).
Do not submit copyrighted work without permission!
Cancel
Editing help
(opens in new window)
Templates used on this page:
Template:Elixir
(
edit
)
Template:Programming language topics
(
edit
)
Navigation menu
Personal tools
Not logged in
Talk
Contributions
Create account
Log in
Namespaces
Page
Discussion
English
Views
Read
Edit
View history
More
Navigation
Main page
Recent changes
Random page
Help about MediaWiki
Tools
What links here
Related changes
Special pages
Page information