exitWith: Difference between revisions

From Bohemia Interactive Community
Jump to navigation Jump to search
mNo edit summary
m (Text replacement - "<sqf>([^↵][^<]*↵[^<]*)<\/sqf>" to "<sqf> $1 </sqf>")
 
(142 intermediate revisions by 24 users not shown)
Line 1: Line 1:
{{Command|= Comments
{{RV|type=command
____________________________________________________________________________________________


| arma |= Game name
|game1= arma1
|version1= 1.00


|1.00|= Game version
|game2= arma2
____________________________________________________________________________________________
|version2= 1.00


| If the result of condition is [[true]], code is evaluated, and current block with result of code. It only exits the current scope. |= Description
|game3= arma2oa
____________________________________________________________________________________________
|version3= 1.50


| ifCommand '''exitWith''' code |= Syntax
|game4= tkoh
|version4= 1.00


|p1= ifCommand: [[If Type]] |= Parameter 1
|game5= arma3
|version5= 0.50


|p2= code: [[Code]] |= Parameter 2
|gr1= Program Flow


| [[Anything]] |= Return value
|descr= Exits the '''current''' code scope. Often used for exiting [[do]], [[for]], [[count]], [[forEach]] or the whole script.
____________________________________________________________________________________________
{{Feature|informative|See {{Link|Variables#Local Variables Scope}} for more information.}}
 
|x1= <code>[[if]] (_x>5) [[exitWith]] {[[echo]] "_x is too big"; _x}</code>


When _x is greater then 5, outputs message and terminates code in current level with value of _x |= Example 1
|s1= ifType [[exitWith]] code
____________________________________________________________________________________________


| [[else]], [[Control Structures]], [[then]] |= See also
|p1= ifType: [[If Type]]


|p2= code: [[Code]]
|r1= [[Anything]]
|x1= <sqf>
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";
</sqf>
|x2= <sqf>
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";
</sqf>
|x3= 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:
<sqf>
onEachFrame {
if (!alive player) exitWith
{
onEachFrame {};
};
};
</sqf>
<sqf>
_time = time + 10;
waitUntil
{
if (time > _time) exitWith { true };
false
};
</sqf>
|x4= <sqf>
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";
};
};
};
</sqf>
|x5= <sqf>
if (_condition) exitWith
{
hint "reached";
};
// else { hint "not reached" }; // [wrong] - using else does not work and makes no sense here
</sqf>
<sqf>
if (_condition) exitWith
{
hint "reached";
};
hint "not reached"; // [correct] - if _condition is met, the scope has already been exited by now
</sqf>
|seealso= [[scopeName]] [[breakOut]] [[breakTo]] [[else]] [[Control Structures]] [[then]] [[assert]] [[try]] [[catch]] [[throw]]
}}
}}


<h3 style="display:none">Notes</h3>
<dl class="command_description">
<dl class="command_description">
<!-- Note Section BEGIN -->


<!-- Note Section END -->
<dt><dt>
</dl>
<dd class="notedate">Posted on 2010-05-28 - 22:15</dd>
<dt class="note">[[User:RoehrenRadio|RoehrenRadio]]</dt>
<dd class="note">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.</dd>
 
<dt><dt>
<dd class="notedate">Posted on 2013-08-04 - 12:20</dd>
<dt class="note">[[User:Killzone_Kid|Killzone_Kid]]</dt>
<dd class="note">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 {{Link|http://killzonekid.com/arma-scripting-tutorials-scopes/|this resource}}.</dd>


<h3 style="display:none">Bottom Section</h3>
<dt></dt>
<dd class="notedate">Posted on 2016-03-10 - 08:31 (UTC)</dd>
<dt class="note">[[User:Killzone_Kid|Killzone_Kid]]</dt>
<dd class="note">
[[exitWith]] cannot be used in event handlers with override ability to simply exit with override value. The following is incorrect:
<sqf>
// INCORRECT USAGE
onMapSingleClick { if (!isServer) exitWith { true } };
</sqf>
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:
<sqf>
// CORRECT USAGE
onMapSingleClick { call { if (!isServer) exitWith { true } } };
</sqf>
[[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.
</dd>


[[Category:Scripting Commands|EXITWITH]]
</dl>
[[Category:Scripting Commands ArmA|EXITWITH]]
[[Category:Command Group: Program Flow|EXITWITH]]

Latest revision as of 19:42, 3 September 2024

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 2010-05-28 - 22:15
RoehrenRadio
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 2013-08-04 - 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 2016-03-10 - 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.