Remove enum layout assumptions from type visitor#5778
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jld wants to merge 5 commits intorust-lang:incomingfrom
Closed
Remove enum layout assumptions from type visitor#5778jld wants to merge 5 commits intorust-lang:incomingfrom
jld wants to merge 5 commits intorust-lang:incomingfrom
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Note for reviewers: the earlier commits have some FIXMEs/NOTEs that are fixed in the later commits. |
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Apr 15, 2013
This takes care of one of the last remnants of assumptions about enum layout. A type visitor is now passed a function to read a value's discriminant, then accesses fields by being passed a byte offset for each one. The latter may not be fully general, despite the constraints imposed on representations by borrowed pointers, but works for any representations currently planned and is relatively simple. Closes #5652.
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This takes care of one of the last remnants of assumptions about enum layout. A type visitor is now passed a function to read a value's discriminant, then accesses fields by being passed a byte offset for each one. The latter may not be fully general, despite the constraints imposed on representations by borrowed pointers, but works for any representations currently planned and is relatively simple.
Closes #5652.