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basic 'lent T' test works

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This commit is contained in:
Andreas Rumpf 2018-01-21 03:04:22 +01:00
commit c99f952dfb
4 changed files with 36 additions and 16 deletions
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5
compiler/parampatterns.nim
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@ -222,7 +222,10 @@ proc isAssignable*(owner: PSym, n: PNode; isUnsafeAddr=false): TAssignableResult
elif compareTypes(n.typ, n.sons[1].typ, dcEqIgnoreDistinct):
# types that are equal modulo distinction preserve l-value:
result = isAssignable(owner, n.sons[1], isUnsafeAddr)
of nkHiddenDeref, nkDerefExpr, nkHiddenAddr:
of nkHiddenDeref:
if n[0].typ.kind == tyLent: result = arDiscriminant
else: result = arLValue
of nkDerefExpr, nkHiddenAddr:
result = arLValue
of nkObjUpConv, nkObjDownConv, nkCheckedFieldExpr:
result = isAssignable(owner, n.sons[0], isUnsafeAddr)