Exception handling

1.00

Armed Assault introduced exception handling through the try, catch and throw scripting commands, allowing scripts to create and react to exceptions.

Standard structure:

try // code block that can throw exception { if (_name == "") then { throw "no name"; }; // this exits the try block and enters the catch block below if (_name == "") throw "no name"; // since Arma 3 v1.54 titleText [format ["Good morning, Captain %1.", _name], "PLAIN DOWN"]; } catch // code block that processes an exception { if (_exception == "no name") then { hint "Name was not entered"; titleText ["Good morning, anonymous Captain.", "PLAIN DOWN"]; }; };

⚠

Real Virtuality scripting commands do not create SQF exceptions by themselves if they encounter an illegal situation,

they throw a compilation exception that cannot be caught by this try-catch structure explained here.

The following would therefore not create a catchable exception:

_divider = 0; try { a = 1 / _divider; } // SQF error happens here already catch { hint "illegal operation"; }; // useless

The proper way:

_divider = 0; try { if (_divider == 0) then { throw "div0"; }; a = 1 / _divider; } catch { hint "illegal operation"; };