NAME
	catch - Catch all errors

SYNOPSIS
	mixed catch(expr)

DESCRIPTION
	Evaluate 'expr'. If there is no error, 0 is returned. If there is a
	standard error, a string (with a leading '*') will be returned.

	The function throw(value) can also be used to immediately return any
	value, except 0.

	The catch() is costly, and should not be used anywhere. Rather, use it
	use it at places where an error would destroy consistency.

SEE ALSO
	throw

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