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Unpack mSlice tupleconstr for static openarrays (#20615)

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Jason Beetham 2022-10-21 22:37:23 -06:00 • committed by GitHub
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21
compiler/semmacrosanity.nim
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@ -66,6 +66,27 @@ proc annotateType*(n: PNode, t: PType; conf: ConfigRef) =
if i >= x.len: globalError conf, n.info, "invalid field at index " & $i
else: annotateType(n[i], x[i], conf)
elif x.kind == tyProc and x.callConv == ccClosure:
n.typ = t
elif x.kind == tyOpenArray: # `opcSlice` transforms slices into tuples
if n.kind == nkTupleConstr:
let
bracketExpr = newNodeI(nkBracket, n.info)
left = int n[1].intVal
right = int n[2].intVal
bracketExpr.flags = n.flags
case n[0].kind # is this a string slice or a array slice
of nkStrKinds:
for i in left..right:
bracketExpr.add newIntNode(nkCharLit, BiggestInt n[0].strVal[i])
annotateType(bracketExpr[^1], t[0], conf)
of nkBracket:
for i in left..right:
bracketExpr.add n[0][i]
annotateType(bracketExpr[^1], t[0], conf)
else:
globalError(conf, n.info, "Incorrectly generated tuple constr")
n[] = bracketExpr[]
n.typ = t
else:
globalError(conf, n.info, "() must have a tuple type")