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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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6
compiler/jsgen.nim
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@ -1455,7 +1455,7 @@ proc genSym(p: PProc, n: PNode, r: var TCompRes) =
s.name.s)
discard mangleName(p.module, s)
r.res = s.loc.r
if lfNoDecl in s.loc.flags or s.magic notin {mNone, mIsolate} or
if lfNoDecl in s.loc.flags or s.magic notin generatedMagics or
{sfImportc, sfInfixCall} * s.flags != {}:
discard
elif s.kind == skMethod and getBody(p.module.graph, s).kind == nkEmpty:
@ -2106,6 +2106,8 @@ proc genMagic(p: PProc, n: PNode, r: var TCompRes) =
gen(p, n[1], x)
useMagic(p, "nimCopy")
r.res = "nimCopy(null, $1, $2)" % [x.rdLoc, genTypeInfo(p, n.typ)]
of mOpenArrayToSeq:
genCall(p, n, r)
of mDestroy, mTrace: discard "ignore calls to the default destructor"
of mOrd: genOrd(p, n, r)
of mLengthStr, mLengthSeq, mLengthOpenArray, mLengthArray:
@ -2622,7 +2624,7 @@ proc gen(p: PProc, n: PNode, r: var TCompRes) =
let s = n[namePos].sym
discard mangleName(p.module, s)
r.res = s.loc.r
if lfNoDecl in s.loc.flags or s.magic notin {mNone, mIsolate}: discard
if lfNoDecl in s.loc.flags or s.magic notin generatedMagics: discard
elif not p.g.generatedSyms.containsOrIncl(s.id):
p.locals.add(genProc(p, s))
of nkType: r.res = genTypeInfo(p, n.typ)