Difference between revisions of "catch"

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m (Text replacement - "\[\[Category:ArmA: Control Structures\|[a-zA-Z0-9 _]*\]\]" to "")
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____________________________________________________________________________________________
 
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| try-block '''catch''' code |SYNTAX=
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| tryBlock [[catch]] code |SYNTAX=
  
|p1= try-Block: [[Exception handling|Exception Type]] |PARAMETER1=
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|p1= tryBlock: [[Exception handling|Exception Type]] |PARAMETER1=
  
 
|p2= code: [[Code]] |PARAMETER2=
 
|p2= code: [[Code]] |PARAMETER2=
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| [[Anything]] |RETURNVALUE=
 
| [[Anything]] |RETURNVALUE=
 
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 +
|x1= <code>[[try]] {[[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code> |EXAMPLE1=
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|x2= {{since|arma3|1.53.133045}}: <code>123 [[try]] {[[if]] (_this != 123) [[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code> |EXAMPLE2=
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|x3= The correct usage of shorthand alt syntax: <code>[[try]] {
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[[if]] (a > b) [[throw]] "Error: some error"; {{cc|OK}}
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{{cc|The command argument is static}}
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} [[catch]] {
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[[hint]] [[str]] _exception;
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};
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[[try]] {
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_someFunc = {
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.....
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};
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[[if]] (a > b) [[throw]] ([[call]] _someFunc); {{cc|NOT OK}}
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{{cc|The command argument is dynamic}}
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{{cc|_someFunc is called first to get the value regardless of (a > b) outcome}}
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} [[catch]] {
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[[hint]] [[str]] _exception;
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};
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[[try]] {
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_someFunc = {
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.....
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};
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[[if]] (a > b) [[then]] {[[throw]] ([[call]] _someFunc)}; /// OK
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{{cc|The command argument is dynamic}}
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{{cc|_someFunc is only called when (a > b) is [[true]]}}
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} [[catch]] {
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[[hint]] [[str]] _exception;
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};</code> |EXAMPLE3=
  
 
| [[Exception handling]], [[try]], [[throw]] |SEEALSO=  
 
| [[Exception handling]], [[try]], [[throw]] |SEEALSO=  
 
 
}}
 
}}
  
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<h3 style="display:none">Bottom Section</h3>
 
<h3 style="display:none">Bottom Section</h3>
  
[[Category:Scripting Commands|CATCH]]
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[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]]
[[Category:Scripting Commands ArmA|CATCH]]
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[[Category:Scripting Commands ArmA|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands ArmA2|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands ArmA2|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands Arma 3|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting Commands Arma 3|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting_Commands_Take_On_Helicopters|{{uc:{{PAGENAME}}}}]]
 
[[Category:Scripting_Commands_Take_On_Helicopters|{{uc:{{PAGENAME}}}}]]
 
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[[Category:Command Group: Program Flow|{{uc:{{PAGENAME}}}}]]
[[Category:Command Group: Program Flow|CATCH]]
 

Revision as of 21:40, 5 January 2020

Introduced with Armed Assault version 1.001.00
Hover & click on the images for descriptions

Description

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

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:
since Arma 3 v1.53.133045: 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

i
Only post proven facts here. Report bugs on the Feedback Tracker and discuss on the Arma Discord or on the Forums.

Notes

Bottom Section