throw: Difference between revisions

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| Throws an exception. The exception is processed by first [[catch]] block. This command will terminate further execution of the code.
| Throws an exception. The exception is processed by first [[catch]] block. This command will terminate further execution of the code.

Revision as of 22:37, 13 June 2021

Hover & click on the images for description

Description

Description:
Description needed
Groups:
Program Flow

Syntax

Syntax:
throw expression
Parameters:
expression: Anything
Return Value:
Nothing

Alternative Syntax

Syntax:
if (condition) throw exception Template:Since
Parameters:
if (condition): If Type - if (condition) returns true, "exception" is thrown
exception: Anything - value that will be put into _exception variable inside catch block
Return Value:
Nothing

Examples

Example 1:
try {throw "invalid argument"} catch {hint str _exception};
Example 2:
Template:Since: 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 handlingtrycatch

Notes

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