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Fuzion • Fuzion Library Modules • try
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try

try

§try
 => 
try
:
effect 
[src]

try -- simple exception effect

try provides an operation 'raise' that immediately stops execution and
returns an 'error' wrapped in an 'outcome'.
§on(R 
type
, f Function try.on.R)
 => 
outcome try.on.R
:
Any 
[src]
install this effect and execute 'f'. Wrap the result of 'f' into an
'outcome' if 'f' returns normally, otherwise if 'f' is aborted early
via a call to 'raise' wrap the 'error' passed to 'raise' into the
resulting 'outcome'.
§raise(e error)
 => 
void
:
Any 
[src]
terminate immediately with the given error wrapped in 'option'.