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net/server: improve error for truthy handler and type :datagram

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Since it is invalid to call accept on a datagram socket, net/server
always errors if handler is truthy and type is :datagram.

Add an assert to give a better error message in this case and clarify
the documentation.

References: https://github.com/janet-lang/janet/issues/1614
This commit is contained in:
Isaac Freund
2025-07-17 13:09:24 +02:00
parent ddc122958b
commit f974c0667b
1 changed files with 7 additions and 1 deletions
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8
src/boot/boot.janet
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@@ -3919,8 +3919,14 @@
(compwhen (dyn 'net/listen)
(defn net/server
"Start a server asynchronously with `net/listen` and `net/accept-loop`. Returns the new server stream."
``
Starts a server with `net/listen`. Runs `net/accept-loop` asynchronously if
`handler` is set and `type` is `:stream` (the default). It is invalid to set
`handler` if `type` is `:datagram`. Returns the new server stream.
``
[host port &opt handler type no-reuse]
(assert (not (and (= type :datagram) handler))
"handler not supported for :datagram servers")
(def s (net/listen host port type no-reuse))
(if handler
(ev/go (fn [] (net/accept-loop s handler))))