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doc: add reference to FAQ to explain warning about concrete type

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R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5820048
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Stefan Nilsson 2012-03-15 09:15:16 +11:00 committed by Andrew Gerrand
parent c959ebe4d8
commit f00872527b
1 changed files with 3 additions and 2 deletions
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doc/articles/error_handling.html
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@ -258,8 +258,9 @@ Next we modify the appHandler type to return <code>*appError</code> values:
<p>
(It's usually a mistake to pass back the concrete type of an error rather than
<code>error</code>, for reasons to be discussed in another article, but
it's the right thing to do here because <code>ServeHTTP</code> is the only
<code>error</code>,
for reasons discussed in <a href="/doc/go_faq.html#nil_error">the Go FAQ</a>,
but it's the right thing to do here because <code>ServeHTTP</code> is the only
place that sees the value and uses its contents.)
</p>