catch

1.001.001.501.000.50

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Description

Description:

Processes code when an exception is thrown in a try block. The exception caught can be found in the _exception variable.

Groups:

Program Flow

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:

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 handling try throw

Notes

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