catch: Difference between revisions

From Bohemia Interactive Community
Jump to navigation Jump to search
mNo edit summary
m (Text replacement - "\| *((\[\[.*\]\],? ?)+) * \}\}" to "|seealso= $1 }}")
(40 intermediate revisions by 12 users not shown)
Line 1: Line 1:
[[Category:Scripting Commands|CATCH]]
{{RV|type=command
[[Category:Scripting Commands ArmA|CATCH]]
[[Category:Armed Assault: Control Flows|CATCH]]


| arma1


<h2 style="color:#000066">'''''try-block'' catch ''code'''''</h2>
|gr1= Program Flow


|1.00


'''Operand types:'''
| Processes code when an [[Exception handling|exception]] is thrown in a [[try]] block. The exception caught can be found in the ''_exception'' variable.


'''try-Block''': ?
| tryBlock [[catch]] code


'''code''': [[Code]]
|p1= tryBlock: [[Exception handling|Exception Type]]


'''Type of returned value:'''
|p2= code: [[Code]]


[[Anything]]
| [[Anything]]


'''Description:'''
|x1= <code>[[try]] {[[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code>


Processes code when an [[Exception handling|exception]] is thrown in a [[try]] block.
|x2= {{Since|arma3|1.53.133045}}: <code>123 [[try]] {[[if]] (_this != 123) [[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code>


The exception caught can be found in the _exception variable.
|x3= The correct usage of shorthand alt syntax: <code>[[try]] {
[[if]] (a > b) [[throw]] "Error: some error"; {{cc|OK}}
{{cc|The command argument is static}}
} [[catch]] {
[[hint]] [[str]] _exception;
};
 
[[try]] {
_someFunc = {
.....
};
[[if]] (a > b) [[throw]] ([[call]] _someFunc); {{cc|NOT OK}}
{{cc|The command argument is dynamic}}
{{cc|_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
{{cc|The command argument is dynamic}}
{{cc|_someFunc is only called when (a > b) is [[true]]}}
} [[catch]] {
[[hint]] [[str]] _exception;
};</code>
 
|seealso= [[Exception handling]], [[try]], [[throw]]
}}
 
 
[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]]
{{GameCategory|arma1|Scripting Commands}}
{{GameCategory|arma2|Scripting Commands}}
{{GameCategory|arma3|Scripting Commands}}
{{GameCategory|tkoh|Scripting Commands}}

Revision as of 00:22, 17 February 2021

Game1 needed - Version1 needed
Hover & click on the images for description

Description

Description:
This article is a Stub. You can help BI Community Wiki by expanding it.
Description needed
Groups:
Program Flow

Syntax

Syntax:
Syntax needed
Parameters:
tryBlock: Exception Type
code: Code
Return Value:
Return value needed

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

Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here! Add Note
Retrieved from "https://community.bistudio.com/wiki?title=catch&oldid=246400"