<div dir="auto">As a workaround, can you try this? <a href="https://stackoverflow.com/a/32133083/477476">https://stackoverflow.com/a/32133083/477476</a></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Mar 6, 2020, 23:23 Christiaan Baaij <<a href="mailto:christiaan.baaij@gmail.com">christiaan.baaij@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hello,</div><div><br></div><div>The other day I was experimenting with RULES and got this warning:</div><div><br></div><div>src/Clash/Sized/Vector.hs:2159:11: warning: [-Winline-rule-shadowing]<br> Rule "map Pack" may never fire<br> because rule "Class op pack" for ‘pack’ might fire first<br> Probable fix: add phase [n] or [~n] to the competing rule<br> |<br>2159 | {-# RULES "map Pack" map pack = id #-}</div><div><br></div><div>The warning seems to suggests two things:</div><div>1. "Class op" -> "dictionary projection" are implemented as rewrite rules and executed the same way as other user-defined RULES<br></div><div>2. These rules run first, and you cannot run anything before them</div><div><br></div><div>Now my question is, is 1. actually true? or is that warning just a (white) lie?</div><div>If 1. is actually true, would there be any objections to adding a "-1" phase: where RULES specified to start from phase "-1" onward fire before any of the Class op rules.</div><div>I'm quite willing to implement the above if A) Class op rules are actually implemented as builtin RULES; B) there a no objections to this "-1" phase.</div><div><br></div><div>Thanks,</div><div>Christiaan<br></div><div><br></div></div>
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