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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>
This commit is contained in:
metagn 2022-08-24 08:11:41 +03:00 • committed by GitHub
commit 0014b9c48e
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17 changed files with 599 additions and 199 deletions
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5
compiler/ccgexprs.nim
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@ -2369,7 +2369,7 @@ proc genMagicExpr(p: BProc, e: PNode, d: var TLoc, op: TMagic) =
genDollar(p, e, d, "#nimFloatToStr($1)")
of mCStrToStr: genDollar(p, e, d, "#cstrToNimstr($1)")
of mStrToStr, mUnown: expr(p, e[1], d)
of mIsolate, mFinished: genCall(p, e, d)
of generatedMagics: genCall(p, e, d)
of mEnumToStr:
if optTinyRtti in p.config.globalOptions:
genEnumToStr(p, e, d)
@ -2978,7 +2978,8 @@ proc expr(p: BProc, n: PNode, d: var TLoc) =
if n[genericParamsPos].kind == nkEmpty:
var prc = n[namePos].sym
if useAliveDataFromDce in p.module.flags:
if p.module.alive.contains(prc.itemId.item) and prc.magic in {mNone, mIsolate, mFinished}:
if p.module.alive.contains(prc.itemId.item) and
prc.magic in generatedMagics:
genProc(p.module, prc)
elif prc.skipGenericOwner.kind == skModule and sfCompileTime notin prc.flags:
if ({sfExportc, sfCompilerProc} * prc.flags == {sfExportc}) or