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begin/end

since version 2.6.0

This macro will cause an error. The error message is the input of the macro, with white spaces removed from the start.

Jamal source
{@error This is the error message.}

will cause and report an error with the message "This is the error message.". To test it in a sample we can use the macro try with the ! character after the macro name:

Jamal source
{@try! {@error This is the error message.}}

will result in:

output
This is the error message.

The use of this macro usually makes sense inside an if macro, that checks some error condition.