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2f6d04fd5d
* strict funcs: use control flow information for a more precise analysis * cursor inference uses control flow information
40 lines
765 B
Nim
40 lines
765 B
Nim
discard """
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errormsg: "'mutate' can have side effects"
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nimout: '''an object reachable from 'n' is potentially mutated
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tfuncs_cannot_mutate.nim(39, 15) the mutation is here
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tfuncs_cannot_mutate.nim(37, 7) is the statement that connected the mutation to the parameter'''
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line: 33
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"""
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{.experimental: "strictFuncs".}
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type
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Node = ref object
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le, ri: Node
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data: string
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func insert(x: var seq[Node]; yyy: Node) =
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let L = x.len
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x.setLen L + 1
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x[L] = yyy
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func len(n: Node): int =
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var it = n
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while it != nil:
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inc result
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it = it.ri
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func doNotDistract(n: Node) =
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var m = Node()
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m.data = "abc"
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func select(a, b: Node): Node = b
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func mutate(n: Node) =
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var it = n
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let x = it
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let y = x
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let z = y
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select(x, z).data = "tricky"
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