catch: Difference between revisions

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m (Text replacement - " +" to " ")
m (Text replacement - " \| *(([^=\| ]+)('''|\[\[)([^=\| ]+)) * \|p1=" to " |s1= $1 |p1=")
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| Processes code when an [[Exception handling|exception]] is thrown in a [[try]] block. The exception caught can be found in the ''_exception'' variable.
| Processes code when an [[Exception handling|exception]] is thrown in a [[try]] block. The exception caught can be found in the ''_exception'' variable.


| tryBlock [[catch]] code
|s1=  tryBlock [[catch]] code


|p1= tryBlock: [[Exception handling|Exception Type]]
|p1= tryBlock: [[Exception handling|Exception Type]]

Revision as of 22:59, 12 June 2021

Hover & click on the images for description

Description

Description:
Description needed
Groups:
Program Flow

Syntax

Syntax:
tryBlock catch code
Parameters:
tryBlock: Exception Type
code: Code
Return Value:
Anything

Examples

Example 1:
try {throw "invalid argument"} catch {hint str _exception};
Example 2:
Template:Since: 123 try {if (_this != 123) throw "invalid argument"} catch {hint str _exception};
Example 3:
The correct usage of shorthand alt syntax: try { if (a > b) throw "Error: some error"; // OK // The command argument is static } catch { hint str _exception; }; try { _someFunc = { ..... }; if (a > b) throw (call _someFunc); // NOT OK // The command argument is dynamic // _someFunc is called first to get the value regardless of (a > b) outcome } catch { hint str _exception; }; try { _someFunc = { ..... }; if (a > b) then {throw (call _someFunc)}; /// OK // The command argument is dynamic // _someFunc is only called when (a > b) is true } catch { hint str _exception; };

Additional Information

See also:
Exception handlingtrythrow

Notes

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