merr.core
->clj/smacro
(-> x & forms)Threads the expr through the forms. Inserts x as the
second item in the first form, making a list of it if it is not a
list already. If there are more forms, inserts the first form as the
second item in second form, etc.
Return MerrError on the spot when there is on the way.
=> (-> 1 inc (- 1))
1
=> (letfn [(failinc [_] (err))]
=> (-> 1 inc failinc inc))
(err)
Threads the expr through the forms. Inserts x as the second item in the first form, making a list of it if it is not a list already. If there are more forms, inserts the first form as the second item in second form, etc. Return `MerrError` on the spot when there is on the way. ``` => (-> 1 inc (- 1)) 1 => (letfn [(failinc [_] (err))] => (-> 1 inc failinc inc)) (err) ```
->>clj/smacro
(->> x & forms)Threads the expr through the forms. Inserts x as the
second item in the first form, making a list of it if it is not a
list already. If there are more forms, inserts the first form as the
second item in second form, etc.
Return MerrError on the spot when there is on the way.
=> (->> 1 inc (- 1))
-1
=> (letfn [(failinc [_] (err))]
=> (->> 1 inc failinc inc))
(err)
Threads the expr through the forms. Inserts x as the second item in the first form, making a list of it if it is not a list already. If there are more forms, inserts the first form as the second item in second form, etc. Return `MerrError` on the spot when there is on the way. ``` => (->> 1 inc (- 1)) -1 => (letfn [(failinc [_] (err))] => (->> 1 inc failinc inc)) (err) ```
causeclj/s
(cause e)Get error cause.
=> (cause (err {:message "foo" :cause (err {:message "bar"})}))
(err {:message "bar"})
Get error cause.
```
=> (cause (err {:message "foo" :cause (err {:message "bar"})}))
(err {:message "bar"})
```dataclj/s
(data e)Get error custom data.
=> (data (err {:message "bar" :data {:hello "world"}}))
{:hello "world"}
Get error custom data.
```
=> (data (err {:message "bar" :data {:hello "world"}}))
{:hello "world"}
```errclj/s
(err)(err {:keys [type message data cause] :or {type default-error-type} :as m})Returns value as MerrError.
NOTE Default error type is :error
=> (:type (err {:message "hello"}))
:error
=> (:type (err {:type :custom-error :message "hello"}))
:custom-error
=> (:data (err {:data {:foo "bar"}}))
{:foo "bar"}
Returns value as `MerrError`.
**NOTE** Default error type is `:error`
```
=> (:type (err {:message "hello"}))
:error
=> (:type (err {:type :custom-error :message "hello"}))
:custom-error
=> (:data (err {:data {:foo "bar"}}))
{:foo "bar"}
```err?clj/s
(err? x)Returns true if x is MerrError.
=> (err? "foo")
false
=> (err? (err {:message "foo"}))
true
Returns `true` if x is `MerrError`.
```
=> (err? "foo")
false
=> (err? (err {:message "foo"}))
true
```letclj/smacro
(let err-sym bindings & body)binding => binding-form init-expr
If init-expr is not MerrError, binding-form bound to the value,
if not, err-sym bound to the MerrError value and rest bindings are skipped.
=> (let +err+ [a 1
=> b (inc a)]
=> [a b (err? +err+)])
[1 2 false]
=> (let +err+ [a (err {:message "ERR"})
=> b (inc a)]
=> [a b (err? +err+)])
[nil nil true]
binding => binding-form init-expr
If init-expr is not `MerrError`, binding-form bound to the value,
if not, `err-sym` bound to the `MerrError` value and rest bindings are skipped.
```
=> (let +err+ [a 1
=> b (inc a)]
=> [a b (err? +err+)])
[1 2 false]
=> (let +err+ [a (err {:message "ERR"})
=> b (inc a)]
=> [a b (err? +err+)])
[nil nil true]
```messageclj/s
(message e)Get error message.
=> (message (err {:type :foo :message "bar"}))
"bar"
Get error message.
```
=> (message (err {:type :foo :message "bar"}))
"bar"
```tryclj/s≠macro
(try & body)Returs MerrError when Exceptions/Errors are thrown.
=> (merr.core/try (throw (ex-info "hello" {})))
err?
=> (type (merr.core/try {:type :test} (throw (ex-info "hello" {}))))
:test
=> (type (merr.core/try (throw (ex-info "hello" {:merr/type :test}))))
:test
=> (data (merr.core/try {:data {:bar 2}} (throw (ex-info "hello" {:foo 1}))))
{:foo 1, :bar 2}
Returs `MerrError` when Exceptions/Errors are thrown.
```
=> (merr.core/try (throw (ex-info "hello" {})))
err?
=> (type (merr.core/try {:type :test} (throw (ex-info "hello" {}))))
:test
=> (type (merr.core/try (throw (ex-info "hello" {:merr/type :test}))))
:test
=> (data (merr.core/try {:data {:bar 2}} (throw (ex-info "hello" {:foo 1}))))
{:foo 1, :bar 2}
```typeclj/s
(type e)Get error type.
=> (type (err {:type :foo :message "bar"}))
:foo
Get error type.
```
=> (type (err {:type :foo :message "bar"}))
:foo
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