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support cstring in case (#20130)

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* implement case for cstring

for now just converts to string on C backend

* custom implementation for cstring

* remove leftover

* revert even more

* add nil + fix packages weird variant literal bug

* update docs
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metagn 2022-09-01 19:10:00 +03:00 • committed by GitHub
commit a95b6391fd
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13 changed files with 126 additions and 18 deletions
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4
compiler/semtypes.nim
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@ -603,7 +603,9 @@ proc semCaseBranch(c: PContext, t, branch: PNode, branchIndex: int,
checkMinSonsLen(t, 1, c.config)
var tmp = fitNode(c, t[0].typ, r, r.info)
# the call to fitNode may introduce a call to a converter
if tmp.kind in {nkHiddenCallConv}: tmp = semConstExpr(c, tmp)
if tmp.kind == nkHiddenCallConv or
(tmp.kind == nkHiddenStdConv and t[0].typ.kind == tyCstring):
tmp = semConstExpr(c, tmp)
branch[i] = skipConv(tmp)
inc(covered)
else: