try

perform action and catch possible errors

Parameters

try action :block :bytecode

Attributes

verbose print all error messages as usual

Returns

  • :null
  • :error

Examples

copy
err: try [
    ; let's try something dangerous
    print 10 / 0
]

type err
; => :error

; Tips: mixing errors and returned values

f: $[][ throw "some error" ]
g: $[][ return "hi" ]

(genericError = err: <= try -> val: f)?
    -> print err
    -> print val
; => Generic Error: some error

(genericError = err: <= try -> val: g)?
    -> print err
    -> print val
; => hi

Related