mirror of
https://github.com/nim-lang/Nim.git
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73 lines
2.7 KiB
Nim
73 lines
2.7 KiB
Nim
discard """
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cmd: "nim check $options --hints:off --warning:ImplicitRangeConversion --warningaserror:ImplicitRangeConversion $file"
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action: "reject"
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nimout: '''
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timplicitrangedownsizing.nim(22, 5) Error: implicit range conversion int -> FakeUint8 [ImplicitRangeConversion]
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timplicitrangedownsizing.nim(24, 5) Error: implicit range conversion OffByOneRange -> FakeUint8 [ImplicitRangeConversion]
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timplicitrangedownsizing.nim(28, 5) Error: implicit range conversion int -> FakeUint8 [ImplicitRangeConversion]
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timplicitrangedownsizing.nim(55, 6) Error: implicit range conversion float64 -> SmallFloat [ImplicitRangeConversion]
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timplicitrangedownsizing.nim(59, 6) Error: implicit range conversion FloatRange -> SmallFloat [ImplicitRangeConversion]
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timplicitrangedownsizing.nim(63, 6) Error: implicit range conversion float64 -> SmallFloat [ImplicitRangeConversion]
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'''
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"""
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# Integer range tests
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type FakeUint8 = range[0..255]
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type OffByOneRange = range[1..256]
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type WideRange = range[0..65535]
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var v: FakeUint8
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var x = 256
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var y = OffByOneRange(256)
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v = x # panics, should trigger warning
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v = FakeUint8(x) # panics, should not trigger warning
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v = y # panics should trigger warning
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proc xxx(v: FakeUint8)= discard
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xxx(x) # panics, should trigger warning
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xxx(FakeUint8(x)) # panics, should not trigger warning
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# Test narrower to wider range conversions (should NOT warn)
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proc acceptWide(v: WideRange) = discard
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var smallRange: FakeUint8 = FakeUint8(100)
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acceptWide(smallRange) # OK - FakeUint8 (0..255) fits in WideRange (0..65535)
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var medRange: OffByOneRange = OffByOneRange(150)
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acceptWide(medRange) # OK - OffByOneRange (1..256) fits in WideRange (0..65535)
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var w: WideRange
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w = smallRange # OK - FakeUint8 range fits in WideRange
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w = medRange # OK - OffByOneRange range fits in WideRange
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# Test narrower range passed to function (should NOT warn)
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xxx(smallRange) # OK - FakeUint8 value fits in range[0..255]
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# Float range tests
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type SmallFloat = range[0.0..10.0]
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type FloatRange = range[5.0..15.0]
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type WideFloatRange = range[0.0..100.0]
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var fv: SmallFloat
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var fx = 11.5 # Out of range
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fv = fx # panics, should trigger warning
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fv = SmallFloat(fx) # panics, should not trigger warning
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var fy = FloatRange(7.5)
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fv = fy # panics, should trigger warning (5.0..15.0 → 0.0..10.0)
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proc fffx(v: SmallFloat) = discard
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fffx(fx) # panics, should trigger warning
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fffx(SmallFloat(fx)) # panics, should not trigger warning
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# Test narrower to wider float range conversions (should NOT warn)
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proc acceptWideFloat(v: WideFloatRange) = discard
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var smallFloatRange: SmallFloat = SmallFloat(5.0)
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acceptWideFloat(smallFloatRange) # OK - SmallFloat (0.0..10.0) fits in WideFloatRange (0.0..100.0)
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var wf: WideFloatRange
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wf = smallFloatRange # OK - SmallFloat range fits in WideFloatRange |