catch: Difference between revisions

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m (Some wiki formatting)
m (Some wiki formatting)
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|x1= <code>[[try]] {[[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code>
|x1= <code>[[try]] {[[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code>


|x2= {{Since|arma3|1.53.133045}}: <code>123 [[try]] {[[if]] (_this != 123) [[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code>
|x2= <code>123 [[try]] {[[if]] (_this != 123) [[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code>


|x3= The correct usage of shorthand alt syntax: <code>[[try]] {
|x3= The correct usage of shorthand alt syntax: <code>[[try]] {

Revision as of 02:00, 11 August 2021

Hover & click on the images for description

Description

Description:
Processes code when an exception is thrown in a try block. The exception caught can be found in the _exception variable.
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:
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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