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new-style concepts implementation, WIP (#15251)

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* fixes #15210 [backport:1.2]

* make tests green
* make ordinal work
* makes Swapable test compile
* make Indexable example work
* concepts: 'self' is now 'Self'
* concepts: make Dictionary example compile
* document the new concept implementation
* concepts: make typeDesc work properly
* concepts: allow documentation comments (d'oh)
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Andreas Rumpf 2021-02-24 13:17:33 +01:00 • committed by GitHub
commit 6278b5d89a
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19 changed files with 528 additions and 59 deletions
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compiler/semstmts.nim
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@ -2076,7 +2076,7 @@ proc semIterator(c: PContext, n: PNode): PNode =
incl(s.typ.flags, tfCapturesEnv)
else:
s.typ.callConv = ccInline
if n[bodyPos].kind == nkEmpty and s.magic == mNone:
if n[bodyPos].kind == nkEmpty and s.magic == mNone and c.inConceptDecl == 0:
localError(c.config, n.info, errImplOfXexpected % s.name.s)
if optOwnedRefs in c.config.globalOptions and result.typ != nil:
result.typ = makeVarType(c, result.typ, tyOwned)