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top-down type inference, implements rfc 149 (#20091)

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* micro implementation of rfc 149

refs https://github.com/nim-lang/RFCs/issues/149

* number/array/seq literals, more statements

* try fix number literal alias issue

* renew expectedType with if/case/try branch types

* fix (nerf) index type handling and float typed int

* use typeAllowed

* tweaks + const test (tested locally) [skip ci]

* fill out more of the checklist

* more literals, change @ order, type conversions

Not copying the full call tree before the typedesc call check
in `semIndirectOp` is also a small performance improvement.

* disable self-conversion warning

* revert type conversions (maybe separate op later)

* deal with CI for now (seems unrelated), try enums

* workaround CI different way

* proper fix

* again

* see sizes

* lol

* overload selection, simplify int literal -> float

* range, new @ solution, try use fitNode for nil

* use new magic

* try fix ranges, new magic, deal with #20193

* add documentation, support templates

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
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metagn 2022-08-24 08:11:41 +03:00 • committed by GitHub
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compiler/vmgen.nim
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@ -1026,7 +1026,7 @@ proc genMagic(c: PCtx; n: PNode; dest: var TDest; m: TMagic) =
c.genAsgnPatch(n[1], d)
c.freeTemp(d)
of mOrd, mChr, mArrToSeq, mUnown: c.gen(n[1], dest)
of mIsolate, mFinished:
of generatedMagics:
genCall(c, n, dest)
of mNew, mNewFinalize:
unused(c, n, dest)