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New features: * dynamically generated prelude fields * arrays with tuples and options as elements New test cases: * test/viper/array-of-tuples.vpr
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| val prelude : Common.reqs -> string |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| // @verify | ||
| // import Array "mo:base/Array"; | ||
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| actor ArrayOfTuples { | ||
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| public func get_tup_arr(): async [(Int, Bool)] { | ||
| let x1 = (42, true); | ||
| let x2 = (0, false); | ||
| return [x1, x2]; | ||
| }; | ||
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| private func set_nested_mut_arr(arr: [var ?(?Int, (Bool, Bool))]) { | ||
| assert arr.size() >= 2; | ||
| assert:return arr.size() >= 2 and | ||
| arr[0] == (old (arr[0])) and | ||
| arr[1] == ?(?42, (true, true)); | ||
| arr[1] := ?(?42, (true, true)); | ||
| }; | ||
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| public func check_arr(): async () { | ||
| let arr : [var ?(?Int, (Bool, Bool))] = [var null, null]; | ||
| set_nested_mut_arr(arr); | ||
| assert:system arr[0] == null; | ||
| assert:system arr[1] == ?(?42, (true, true)); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| Parse warning: In macro $Perm, the following parameters were defined but not used: $Self (array-of-tuples.vpr@29.1) | ||
| Parse warning: In macro $Inv, the following parameters were defined but not used: $Self (array-of-tuples.vpr@30.1) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| /* BEGIN PRELUDE */ | ||
| /* Array encoding */ | ||
| domain Array { | ||
| function $loc(a: Array, i: Int): Ref | ||
| function $size(a: Array): Int | ||
| function $loc_inv1(r: Ref): Array | ||
| function $loc_inv2(r: Ref): Int | ||
| axiom $all_diff_array { forall a: Array, i: Int :: {$loc(a, i)} $loc_inv1($loc(a, i)) == a && $loc_inv2($loc(a, i)) == i } | ||
| axiom $size_nonneg { forall a: Array :: $size(a) >= 0 } | ||
| } | ||
| define $array_acc(a, t, p) forall j: Int :: 0 <= j && j < $size(a) ==> acc($loc(a, j).t, p) | ||
| define $array_untouched(a, t) forall j: Int :: 0 <= j && j < $size(a) ==> $loc(a, j).t == old($loc(a, j).t) | ||
| define $array_init(a, t, x) forall i : Int :: 0 <= i && i < $size(a) ==> $loc(a, i).t == x | ||
| /* Tuple encoding */ | ||
| adt Tuple$2 [T0, T1] { Tup$2(tup$2$0 : T0, tup$2$1 : T1) } | ||
| /* Option encoding */ | ||
| adt Option[T] { | ||
| None() | ||
| Some(some$0: T) | ||
| } | ||
| /* Text encoding */ | ||
| function $concat(a: Int, b: Int): Int | ||
| /* Typed references */ | ||
| field $option$tuple2$option$int$tuple2$bool$bool: | ||
| Option[Tuple$2[Option[Int], Tuple$2[Bool, Bool]]] | ||
| field $tuple2$int$bool: Tuple$2[Int, Bool] | ||
| /* END PRELUDE */ | ||
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| define $Perm($Self) (true) | ||
| define $Inv($Self) (true) | ||
| method __init__($Self: Ref) | ||
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| requires $Perm($Self) | ||
| ensures $Perm($Self) | ||
| ensures $Inv($Self) | ||
| { | ||
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| } | ||
| method get_tup_arr($Self: Ref) | ||
| returns ($Res: Array) | ||
| requires $Perm($Self) | ||
| requires $Inv($Self) | ||
| ensures $Perm($Self) | ||
| ensures $array_acc($Res, $tuple2$int$bool, wildcard) | ||
| ensures $Inv($Self) | ||
| { var x1: Tuple$2[Int, Bool] | ||
| var x2: Tuple$2[Int, Bool] | ||
| x1 := Tup$2(42, true); | ||
| x2 := Tup$2(0, false); | ||
| inhale $array_acc($Res, $tuple2$int$bool, write); | ||
| inhale ($size($Res) == 2); | ||
| ($loc($Res, 0)).$tuple2$int$bool := x1; | ||
| ($loc($Res, 1)).$tuple2$int$bool := x2; | ||
| exhale $array_acc($Res, $tuple2$int$bool, wildcard); | ||
| inhale $array_acc($Res, $tuple2$int$bool, wildcard); | ||
| goto $Ret; | ||
| label $Ret; | ||
| } | ||
| method set_nested_mut_arr($Self: Ref, arr: Array) | ||
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| requires $Perm($Self) | ||
| requires $array_acc(arr, $option$tuple2$option$int$tuple2$bool$bool, | ||
| write) | ||
| ensures $Perm($Self) | ||
| ensures $array_acc(arr, $option$tuple2$option$int$tuple2$bool$bool, | ||
| write) | ||
| ensures ((($size(arr) >= 2) && (($loc(arr, 0)).$option$tuple2$option$int$tuple2$bool$bool == | ||
| old(($loc(arr, 0)).$option$tuple2$option$int$tuple2$bool$bool))) && ( | ||
| ($loc(arr, 1)).$option$tuple2$option$int$tuple2$bool$bool == Some( | ||
| Tup$2( | ||
| Some(42), | ||
| Tup$2(true, | ||
| true))))) | ||
| { | ||
| assume ($size(arr) >= 2); | ||
| ($loc(arr, 1)).$option$tuple2$option$int$tuple2$bool$bool := Some( | ||
| Tup$2( | ||
| Some(42), | ||
| Tup$2(true, | ||
| true))); | ||
| label $Ret; | ||
| } | ||
| method check_arr($Self: Ref) | ||
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| requires $Perm($Self) | ||
| requires $Inv($Self) | ||
| ensures $Perm($Self) | ||
| ensures $Inv($Self) | ||
| { var arr: Array | ||
| inhale $array_acc(arr, $option$tuple2$option$int$tuple2$bool$bool, | ||
| write); | ||
| inhale ($size(arr) == 2); | ||
| ($loc(arr, 0)).$option$tuple2$option$int$tuple2$bool$bool := None(); | ||
| ($loc(arr, 1)).$option$tuple2$option$int$tuple2$bool$bool := None(); | ||
| set_nested_mut_arr($Self, arr); | ||
| assert (($loc(arr, 0)).$option$tuple2$option$int$tuple2$bool$bool == | ||
| None()); | ||
| assert (($loc(arr, 1)).$option$tuple2$option$int$tuple2$bool$bool == | ||
| Some(Tup$2(Some(42), Tup$2(true, true)))); | ||
| label $Ret; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1 +1 @@ | ||
| Parse warning: In macro $Inv, the following parameters were defined but not used: $Self (array.vpr@42.1) | ||
| Parse warning: In macro $Inv, the following parameters were defined but not used: $Self (array.vpr@36.1) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| [0] Postcondition of __init__ might not hold. Assertion $Self.u might not hold. (assertions.vpr@42.13--42.24) | ||
| [1] Assert might fail. Assertion $Self.u ==> $Self.v > 0 might not hold. (assertions.vpr@60.15--60.44) | ||
| [0] Postcondition of __init__ might not hold. Assertion $Self.u might not hold. (assertions.vpr@34.13--34.24) | ||
| [1] Assert might fail. Assertion $Self.u ==> $Self.v > 0 might not hold. (assertions.vpr@52.15--52.44) |
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