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fix #16185 (#16195)

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* fix #16185

* fix test

* fix comment

* fix comment

* better approach
This commit is contained in:
cooldome 2020-11-30 17:45:37 +00:00 • committed by GitHub
commit bb4b27a2ca
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3 changed files with 126 additions and 61 deletions
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15
compiler/trees.nim
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@ -54,6 +54,21 @@ proc exprStructuralEquivalent*(a, b: PNode; strictSymEquality=false): bool =
strictSymEquality): return
result = true
proc sameLocation*(a, b: PNode): bool =
if a == b: true
elif a == nil or b == nil: false
elif a.kind == b.kind:
case a.kind:
of nkCheckedFieldExpr, nkDerefExpr, nkHiddenDeref,
nkAddr, nkHiddenAddr, nkObjDownConv, nkObjUpConv:
sameLocation(a[0], b[0])
of nkDotExpr, nkBracketExpr:
sameLocation(a[0], b[0]) and sameLocation(a[1], b[1])
of nkHiddenStdConv, nkHiddenSubConv: sameLocation(a[1], b[1])
of nkNone..nkNilLit: exprStructuralEquivalent(a, b, strictSymEquality = true)
else: false
else: false
proc sameTree*(a, b: PNode): bool =
if a == b:
result = true