1 | import _arity from "./internal/_arity.js";
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2 | import _concat from "./internal/_concat.js";
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3 | import _curry2 from "./internal/_curry2.js";
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4 | /**
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5 | * `tryCatch` takes two functions, a `tryer` and a `catcher`. The returned
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6 | * function evaluates the `tryer`; if it does not throw, it simply returns the
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7 | * result. If the `tryer` *does* throw, the returned function evaluates the
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8 | * `catcher` function and returns its result. Note that for effective
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9 | * composition with this function, both the `tryer` and `catcher` functions
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10 | * must return the same type of results.
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11 | *
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12 | * @func
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13 | * @memberOf R
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14 | * @since v0.20.0
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15 | * @category Function
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16 | * @sig (...x -> a) -> ((e, ...x) -> a) -> (...x -> a)
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17 | * @param {Function} tryer The function that may throw.
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18 | * @param {Function} catcher The function that will be evaluated if `tryer` throws.
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19 | * @return {Function} A new function that will catch exceptions and send them to the catcher.
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20 | * @example
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21 | *
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22 | * R.tryCatch(R.prop('x'), R.F)({x: true}); //=> true
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23 | * R.tryCatch(() => { throw 'foo'}, R.always('caught'))('bar') // =>
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24 | * 'caught'
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25 | * R.tryCatch(R.times(R.identity), R.always([]))('s') // => []
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26 | * R.tryCatch(() => { throw 'this is not a valid value'}, (err, value)=>({error : err, value }))('bar') // => {'error': 'this is not a valid value', 'value': 'bar'}
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27 | */
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28 |
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29 | var tryCatch =
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30 | /*#__PURE__*/
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31 | _curry2(function _tryCatch(tryer, catcher) {
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32 | return _arity(tryer.length, function () {
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33 | try {
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34 | return tryer.apply(this, arguments);
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35 | } catch (e) {
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36 | return catcher.apply(this, _concat([e], arguments));
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37 | }
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38 | });
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39 | });
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40 |
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41 | export default tryCatch; |
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