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fixes #20422; emit nimPrepareStrMutationV2 for toOpenArray to keep th… (#21459)

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fixes #20422; emit nimPrepareStrMutationV2 for toOpenArray to keep the abstraction of mutable strings which have immutable string literals
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Andreas Rumpf 2023-03-02 08:36:02 +01:00 • committed by GitHub
commit 50baf21eac
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3 changed files with 19 additions and 2 deletions
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compiler/ccgexprs.nim
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@ -2408,7 +2408,10 @@ proc genDispose(p: BProc; n: PNode) =
lineCg(p, cpsStmts, ["#nimDestroyAndDispose($#)", rdLoc(a)])
proc genSlice(p: BProc; e: PNode; d: var TLoc) =
let (x, y) = genOpenArraySlice(p, e, e.typ, e.typ.lastSon)
let (x, y) = genOpenArraySlice(p, e, e.typ, e.typ.lastSon,
prepareForMutation = e[1].kind == nkHiddenDeref and
e[1].typ.skipTypes(abstractInst).kind == tyString and
p.config.selectedGC in {gcArc, gcOrc})
if d.k == locNone: getTemp(p, e.typ, d)
linefmt(p, cpsStmts, "$1.Field0 = $2; $1.Field1 = $3;$n", [rdLoc(d), x, y])
when false: