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expose nth over API, change _getitem_ in python bindings to use nth instead of at, add 'at' operator for the purpose of the previous semantics

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2019-03-17 11:23:01 -07:00
parent f534f79a21
commit 834cf962a1
7 changed files with 66 additions and 1 deletions
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13
src/api/dotnet/Context.cs
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@ -2454,7 +2454,7 @@ namespace Microsoft.Z3
/// <summary>
/// Retrieve sequence of length one at index.
/// </summary>
public SeqExpr MkAt(SeqExpr s, IntExpr index)
public SeqExpr MkAt(SeqExpr s, Expr index)
{
Debug.Assert(s != null);
Debug.Assert(index != null);
@ -2462,6 +2462,17 @@ namespace Microsoft.Z3
return new SeqExpr(this, Native.Z3_mk_seq_at(nCtx, s.NativeObject, index.NativeObject));
}
/// <summary>
/// Retrieve element at index.
/// </summary>
public SeqExpr MkNth(SeqExpr s, Expr index)
{
Debug.Assert(s != null);
Debug.Assert(index != null);
CheckContextMatch(s, index);
return new SeqExpr(this, Native.Z3_mk_seq_nth(nCtx, s.NativeObject, index.NativeObject));
}
/// <summary>
/// Extract subsequence.
/// </summary>