Difference between revisions of "catch"
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Lou Montana (talk | contribs) m (Text replacement - "\[\[Category:ArmA: Control Structures\|[a-zA-Z0-9 _]*\]\]" to "") |
Lou Montana (talk | contribs) (Add example) |
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____________________________________________________________________________________________ | ____________________________________________________________________________________________ | ||
| − | | | + | | tryBlock [[catch]] code |SYNTAX= |
| − | |p1= | + | |p1= tryBlock: [[Exception handling|Exception Type]] |PARAMETER1= |
|p2= code: [[Code]] |PARAMETER2= | |p2= code: [[Code]] |PARAMETER2= | ||
| Line 18: | Line 18: | ||
| [[Anything]] |RETURNVALUE= | | [[Anything]] |RETURNVALUE= | ||
____________________________________________________________________________________________ | ____________________________________________________________________________________________ | ||
| + | |||
| + | |x1= <code>[[try]] {[[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code> |EXAMPLE1= | ||
| + | |||
| + | |x2= {{since|arma3|1.53.133045}}: <code>123 [[try]] {[[if]] (_this != 123) [[throw]] "invalid argument"} [[catch]] {[[hint]] [[str]] _exception};</code> |EXAMPLE2= | ||
| + | |||
| + | |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> |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| | + | [[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]] |
| − | [[Category:Scripting Commands ArmA| | + | [[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}}}}]] | ||
| − | + | [[Category:Command Group: Program Flow|{{uc:{{PAGENAME}}}}]] | |
| − | [[Category:Command Group: Program Flow| | ||
Revision as of 21:40, 5 January 2020
1.00Hover & 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
Only post proven facts here. Report bugs on the feedback tracker. Use the Talk page or the Forums for discussions.
