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WIP: disallow 'nil' for strings and seqs

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This commit is contained in:
Andreas Rumpf 2018-08-13 11:41:33 +02:00
commit dae5450947
43 changed files with 207 additions and 173 deletions
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compiler/sem.nim
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@ -119,7 +119,7 @@ proc commonType*(x, y: PType): PType =
elif b.kind == tyStmt: result = b
elif a.kind == tyTypeDesc:
# turn any concrete typedesc into the abstract typedesc type
if a.sons == nil: result = a
if a.len == 0: result = a
else:
result = newType(tyTypeDesc, a.owner)
rawAddSon(result, newType(tyNone, a.owner))