483f32edd8
This feature produced counterintuitive behavior and confused users. See discussion at #770. As pointed out by @tydeu, it is not too much work to write `Id.run <|` before the `do` when we want to use the `do` notation in pure code. closes #770
37 lines
920 B
Text
37 lines
920 B
Text
def mkByteArray (n : Nat) : ByteArray := Id.run <| do
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let mut r := {}
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for i in [:n] do
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r := r.push (UInt8.ofNat i)
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return r
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def tst1 (n : Nat) (expected : UInt32) : IO Unit := do
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let bs := mkByteArray n
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let sum := bs.foldl (init := 0) fun s b => s + b.toUInt32
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assert! sum == expected
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IO.println sum
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#eval tst1 100 4950
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def tst2 (n : Nat) (expected : UInt32) : IO Unit := do
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let bs := mkByteArray n
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let mut sum := 0
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for b in bs do
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sum := sum + b.toUInt32
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assert! sum == expected
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IO.println sum
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#eval tst2 100 4950
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def tst3 (n : Nat) (expected : UInt32) : IO Unit := do
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let bs := mkByteArray n
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let mut sum := 0
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for i in [:bs.size] do
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sum := sum + bs[i].toUInt32
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assert! sum == expected
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IO.println sum
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#eval tst3 100 4950
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set_option trace.compiler.ir.result true in
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def computeByteHash (bytes : ByteArray) :=
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bytes.foldl (init := 1723) fun h b => mixHash h (hash b)
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