exitWith: Difference between revisions

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[[exitWith]] cannot be used in event handlers with override ability to simply exit with override value. The following is incorrect:
[[exitWith]] cannot be used in event handlers with override ability to simply exit with override value. The following is incorrect:
<code>// INCORRECT USAGE
<code>// INCORRECT USAGE
onMapSingleClick {if (!isServer) exitWith {[[true]]}};</code>
onMapSingleClick {if (!isServer) exitWith {true}};</code>
The override value must be returned in the main scope of EH, but since it is exited with [[exitWith]], it never happens. The correct way in this case would be:
The override value must be returned in the main scope of EH, but since it is exited with [[exitWith]], it never happens. The correct way in this case would be:
<code>// CORRECT USAGE
<code>// CORRECT USAGE
onMapSingleClick {call {if (!isServer) [[exitWith]] {[[true]]}}};</code>
onMapSingleClick {call {if (!isServer) exitWith {[[true]]}}};</code>
[[exitWith]] will exit current [[call]] scope only and override value therefore will appear in the main scope of the EH, right where we want it.
[[exitWith]] will exit current [[call]] scope only and override value therefore will appear in the main scope of the EH, right where we want it.
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Revision as of 11:34, 12 May 2022

Hover & click on the images for description

Description

Description:
Exits the current code scope. Often used for exiting do, for, count, forEach or the whole script.
See Variables - Local Variables Scope for more information.
Groups:
Program Flow

Syntax

Syntax:
ifType exitWith code
Parameters:
ifType: If Type
code: Code
Return Value:
Anything

Examples

Example 1:
systemChat "start"; private _condition = true; if (_condition) then { if (true) exitWith { systemChat "exiting if _condition scope"; }; systemChat "never shown"; }; systemChat "exiting #1 worked"; if (true) exitWith { systemChat "exiting the main scope = leaving the whole script"; }; systemChat "never shown - the script has already ended";
Example 2:
for "_j" from 1 to 10 do { systemChat format ["%1", _j]; // the for loop will cease and code execution will continue after the end of the loop if (_j == 5) exitWith { systemChat "5 is enough"; }; }; systemChat "Complete";
Example 3:
Most loops will also terminate when their scope is exited. To exit and terminate scopes which are called every frame such as onEachFrame and waitUntil use the following examples: onEachFrame { if (!alive player) exitWith { onEachFrame {}; }; }; _time = time + 10; waitUntil { if (time > _time) exitWith { true }; false };
Example 4:
while { true } do { if (alive player) then { if (time > 300) exitWith // wrong - it will only leave the "if alive player" scope, remaining in the "while true" loop forever { hint "exiting"; }; }; };
Example 5:
if (_condition) exitWith { hint "reached"; }; // else { hint "not reached" }; // wrong - using else does not work and makes no sense here if (_condition) exitWith { hint "reached"; }; hint "not reached"; // correct - if _condition is met, the scope has already been exited by now

Additional Information

See also:
scopeName breakOut breakTo else Control Structures then assert try catch throw

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
Posted on May 28, 2010 - 22:15
Roehre
Since Arma 2 uses Blocks in FSM as any ordinary Handle like while, for etc. in Scripts, ExitWith also only closes the Block in the FSM.
Posted on August 04, 2013 - 12:20
Killzone_Kid
The command will exit the current scope - no ifs no buts. If the current scope is a loop, it will exit the loop. If the current scope is the main body of a script, it will exit the script. For more understanding of scopes and exitWith have a look at this resource.
Posted on March 10, 2016 - 08:31 (UTC)
Killzone Kid
exitWith cannot be used in event handlers with override ability to simply exit with override value. The following is incorrect: // INCORRECT USAGE onMapSingleClick {if (!isServer) exitWith {true}}; The override value must be returned in the main scope of EH, but since it is exited with exitWith, it never happens. The correct way in this case would be: // CORRECT USAGE onMapSingleClick {call {if (!isServer) exitWith {true}}}; exitWith will exit current call scope only and override value therefore will appear in the main scope of the EH, right where we want it.