197bc6cb66
This PR redefines `String` to be the type of byte arrays `b` for which `b.IsValidUtf8`. This moves the data model of strings much closer to the actual data representation at runtime. In the near future, we will - provide variants of `String.Pos` and `Substring` that only allow for valid positions - redefine all `String` functions to be much closer to their C++ implementations In the near-to-medium future we will then provide comprehensive verification of `String` based on these refactors.
64 lines
2.1 KiB
Text
64 lines
2.1 KiB
Text
def f (s : String) : String :=
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s ++ " " ++ s
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def g (s : String) : String :=
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s.push ' ' ++ s.push '-'
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def h (s : String) : String :=
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let it₁ := s.mkIterator;
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let it₂ := it₁.next;
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it₁.remainingToString ++ "-" ++ it₂.remainingToString
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#eval "hello" ++ "hello"
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#eval f "hello"
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#eval (f "αβ").length
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#eval "hello".toList
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#eval "αβ".toList
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#eval "".toList
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#eval "αβγ".toList
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#eval "αβγ".mkIterator.1
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#eval "αβγ".mkIterator.next.1
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#eval "αβγ".mkIterator.next.next.1
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#eval "αβγ".mkIterator.next.2
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#eval "αβ".data
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#eval "αβ".push 'a'
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#eval g "α"
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#eval "".mkIterator.curr
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#eval ("αβγ".mkIterator.setCurr 'a').toString
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#eval (("αβγ".mkIterator.setCurr 'a').next.setCurr 'b').toString
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#eval ((("αβγ".mkIterator.setCurr 'a').next.setCurr 'b').next.setCurr 'c').toString
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#eval ((("αβγ".mkIterator.setCurr 'a').next.setCurr 'b').prev.setCurr 'c').toString
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#eval ("abc".mkIterator.setCurr '0').toString
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#eval (("abc".mkIterator.setCurr '0').next.setCurr '1').toString
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#eval ((("abc".mkIterator.setCurr '0').next.setCurr '1').next.setCurr '2').toString
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#eval ((("abc".mkIterator.setCurr '0').next.setCurr '1').prev.setCurr '2').toString
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#eval ("abc".mkIterator.setCurr (Char.ofNat 955)).toString
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#eval h "abc"
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#eval "abc".mkIterator.remainingToString
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#eval ("a".push (Char.ofNat 0)) ++ "bb"
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#eval (("a".push (Char.ofNat 0)) ++ "αb").length
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#eval "".mkIterator.hasNext
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#eval "a".mkIterator.hasNext
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#eval "a".mkIterator.next.hasNext
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#eval "".mkIterator.hasPrev
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#eval "a".mkIterator.next.hasPrev
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#eval "αβ".mkIterator.next.hasPrev
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#eval "αβ".mkIterator.next.prev.hasPrev
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#eval "abc" == "abc"
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#eval "abc" == "abd"
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#eval "αβγ".drop 1
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#eval "αβγ".takeRight 1
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def ss : Substring := "0123abcdαβγδ".toSubstring
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#eval ss.drop 4 |>.takeRight 4
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#eval ss.drop 4 |>.take 4
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#eval ss.dropRight 4 |>.takeRight 4
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def ssDots : Substring := "____abc.αβγ.123.____".toSubstring.extract ⟨4⟩ ⟨19⟩
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#eval ssDots.splitOn "."
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def ssHyphs : Substring := "____abc--αβγ--123--____".toSubstring.extract ⟨4⟩ ⟨22⟩
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#eval ssHyphs.splitOn "--"
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#eval "αβγ".get' 0 (by decide)
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#eval "αβγ".get' ⟨2⟩ (by decide)
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#eval "αβγ".next' ⟨2⟩ (by decide)
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