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List:       haskell-cafe
Subject:    Re: [Haskell-cafe] What does "1 = 2" mean in Haskell?
From:       Alexey Muranov <alexey.muranov () gmail ! com>
Date:       2017-02-27 6:51:29
Message-ID: 4b07c138-02f9-4a04-b76a-fecf511e9bb4 () googlegroups ! com
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On Monday, February 27, 2017 at 12:35:26 AM UTC+1, o...@cs.otago.ac.nz 
wrote:
>
> >
> > Furthermore, you would not want
> > ```
> > main = let 1 = 2 in print "foo"
> > ```
> > to error, since the pattern match is unused, and haskell is a lazy
> > language.
>
> That's not at all clear.  In fact, I believe this thread exists
> because the OP's daughter expected that it WOULD raise an error.
>

 I think i agree with this. IMO it should raise an error as well as

  (\1 -> "hello") 2

does.

Alexey.

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<div dir="ltr">On Monday, February 27, 2017 at 12:35:26 AM UTC+1, o...@cs.otago.ac.nz \
wrote:<blockquote class="gmail_quote" style="margin: 0;margin-left: \
0.8ex;border-left: 1px #ccc solid;padding-left: 1ex;">&gt;<br>&gt; Furthermore, you \
would not want<br>&gt; ```<br>&gt; main = let 1 = 2 in print &quot;foo&quot;<br>&gt; \
```<br>&gt; to error, since the pattern match is unused, and haskell is a \
lazy<br>&gt; language.<p>That&#39;s not at all clear.   In fact, I believe this \
thread exists<br>because the OP&#39;s daughter expected that it WOULD raise an \
error.</p></blockquote><div><br>  I think i agree with this. IMO it should raise an \
error as well as<br><br>   (\1 -&gt; &quot;hello&quot;) \
2<br><br>does.<br><br>Alexey.<br></div></div>


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