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seq, API
Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner
parent
a3c4972c85
commit
68a532d066
9 changed files with 454 additions and 20 deletions
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@ -2286,6 +2286,230 @@ namespace Microsoft.Z3
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#endregion
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#region Sequence, string and regular expresions
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/// <summary>
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/// Create the empty sequence.
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/// </summary>
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public SeqExpr MkEmptySeq(Sort s)
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{
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Contract.Requires(s != null);
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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return new SeqExpr(this, Native.Z3_mk_seq_empty(nCtx, s.NativeObject));
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}
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/// <summary>
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/// Create the singleton sequence.
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/// </summary>
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public SeqExpr MkUnit(Expr elem)
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{
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Contract.Requires(elem != null);
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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return new SeqExpr(this, Native.Z3_mk_seq_unit(nCtx, elem.NativeObject));
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}
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/// <summary>
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/// Create a string constant.
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/// </summary>
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public SeqExpr MkString(string s)
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{
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Contract.Requires(s != null);
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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return new SeqExpr(this, Native.Z3_mk_string(nCtx, s));
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}
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/// <summary>
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/// Concatentate sequences.
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/// </summary>
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public SeqExpr MkConcat(params SeqExpr[] t)
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{
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Contract.Requires(t != null);
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Contract.Requires(Contract.ForAll(t, a => a != null));
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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CheckContextMatch(t);
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return new SeqExpr(this, Native.Z3_mk_seq_concat(nCtx, (uint)t.Length, AST.ArrayToNative(t)));
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}
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/// <summary>
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/// Retrieve the length of a given sequence.
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/// </summary>
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public IntExpr MkLength(SeqExpr s)
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{
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Contract.Requires(s != null);
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Contract.Ensures(Contract.Result<IntExpr>() != null);
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return (IntExpr) Expr.Create(this, Native.Z3_mk_seq_length(nCtx, s.NativeObject));
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}
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/// <summary>
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/// Check for sequence prefix.
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/// </summary>
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public BoolExpr MkPrefixOf(SeqExpr s1, SeqExpr s2)
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{
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Contract.Requires(s1 != null);
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Contract.Requires(s2 != null);
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Contract.Ensures(Contract.Result<BoolExpr>() != null);
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CheckContextMatch(s1, s2);
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return new BoolExpr(this, Native.Z3_mk_seq_prefix(nCtx, s1.NativeObject, s2.NativeObject));
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}
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/// <summary>
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/// Check for sequence suffix.
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/// </summary>
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public BoolExpr MkSuffixOf(SeqExpr s1, SeqExpr s2)
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{
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Contract.Requires(s1 != null);
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Contract.Requires(s2 != null);
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Contract.Ensures(Contract.Result<BoolExpr>() != null);
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CheckContextMatch(s1, s2);
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return new BoolExpr(this, Native.Z3_mk_seq_suffix(nCtx, s1.NativeObject, s2.NativeObject));
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}
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/// <summary>
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/// Check for sequence containment of s2 in s1.
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/// </summary>
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public BoolExpr MkContains(SeqExpr s1, SeqExpr s2)
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{
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Contract.Requires(s1 != null);
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Contract.Requires(s2 != null);
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Contract.Ensures(Contract.Result<BoolExpr>() != null);
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CheckContextMatch(s1, s2);
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return new BoolExpr(this, Native.Z3_mk_seq_contains(nCtx, s1.NativeObject, s2.NativeObject));
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}
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/// <summary>
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/// Retrieve sequence of length one at index.
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/// </summary>
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public SeqExpr MkAt(SeqExpr s, IntExpr index)
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{
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Contract.Requires(s != null);
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Contract.Requires(index != null);
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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CheckContextMatch(s, index);
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return new SeqExpr(this, Native.Z3_mk_seq_at(nCtx, s.NativeObject, index.NativeObject));
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}
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/// <summary>
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/// Extract subsequence.
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/// </summary>
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public SeqExpr MkExtract(SeqExpr s, IntExpr offset, IntExpr length)
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{
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Contract.Requires(s != null);
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Contract.Requires(offset != null);
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Contract.Requires(length != null);
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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CheckContextMatch(s, offset, length);
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return new SeqExpr(this, Native.Z3_mk_seq_extract(nCtx, s.NativeObject, offset.NativeObject, length.NativeObject));
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}
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/// <summary>
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/// Extract index of sub-string starting at offset.
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/// </summary>
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public IntExpr MkIndexOf(SeqExpr s, SeqExpr substr, ArithExpr offset)
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{
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Contract.Requires(s != null);
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Contract.Requires(offset != null);
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Contract.Requires(substr != null);
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Contract.Ensures(Contract.Result<IntExpr>() != null);
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CheckContextMatch(s, substr, offset);
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return new IntExpr(this, Native.Z3_mk_seq_index(nCtx, s.NativeObject, substr.NativeObject, offset.NativeObject));
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}
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/// <summary>
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/// Replace the first occurrence of src by dst in s.
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/// </summary>
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public SeqExpr MkReplace(SeqExpr s, SeqExpr src, SeqExpr dst)
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{
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Contract.Requires(s != null);
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Contract.Requires(src != null);
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Contract.Requires(dst != null);
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Contract.Ensures(Contract.Result<SeqExpr>() != null);
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CheckContextMatch(s, src, dst);
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return new SeqExpr(this, Native.Z3_mk_seq_replace(nCtx, s.NativeObject, src.NativeObject, dst.NativeObject));
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}
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/// <summary>
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/// Convert a regular expression that accepts sequence s.
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/// </summary>
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public ReExpr MkToRe(SeqExpr s)
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{
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Contract.Requires(s != null);
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Contract.Ensures(Contract.Result<ReExpr>() != null);
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return new ReExpr(this, Native.Z3_mk_seq_to_re(nCtx, s.NativeObject));
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}
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/// <summary>
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/// Check for regular expression membership.
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/// </summary>
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public BoolExpr MkInRe(SeqExpr s, ReExpr re)
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{
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Contract.Requires(s != null);
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Contract.Requires(re != null);
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Contract.Ensures(Contract.Result<BoolExpr>() != null);
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CheckContextMatch(s, re);
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return new BoolExpr(this, Native.Z3_mk_seq_in_re(nCtx, s.NativeObject, re.NativeObject));
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}
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/// <summary>
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/// Take the Kleene star of a regular expression.
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/// </summary>
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public ReExpr MkStar(ReExpr re)
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{
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Contract.Requires(re != null);
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Contract.Ensures(Contract.Result<ReExpr>() != null);
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return new ReExpr(this, Native.Z3_mk_re_star(nCtx, re.NativeObject));
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}
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/// <summary>
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/// Take the Kleene plus of a regular expression.
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/// </summary>
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public ReExpr MPlus(ReExpr re)
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{
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Contract.Requires(re != null);
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Contract.Ensures(Contract.Result<ReExpr>() != null);
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return new ReExpr(this, Native.Z3_mk_re_plus(nCtx, re.NativeObject));
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}
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/// <summary>
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/// Create the optional regular expression.
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/// </summary>
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public ReExpr MOption(ReExpr re)
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{
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Contract.Requires(re != null);
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Contract.Ensures(Contract.Result<ReExpr>() != null);
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return new ReExpr(this, Native.Z3_mk_re_option(nCtx, re.NativeObject));
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}
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/// <summary>
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/// Create the concatenation of regular languages.
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/// </summary>
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public ReExpr MkConcat(params ReExpr[] t)
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{
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Contract.Requires(t != null);
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Contract.Requires(Contract.ForAll(t, a => a != null));
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Contract.Ensures(Contract.Result<ReExpr>() != null);
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CheckContextMatch(t);
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return new ReExpr(this, Native.Z3_mk_re_concat(nCtx, (uint)t.Length, AST.ArrayToNative(t)));
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}
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/// <summary>
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/// Create the union of regular languages.
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/// </summary>
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public ReExpr MkUnion(params ReExpr[] t)
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{
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Contract.Requires(t != null);
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Contract.Requires(Contract.ForAll(t, a => a != null));
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Contract.Ensures(Contract.Result<ReExpr>() != null);
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CheckContextMatch(t);
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return new ReExpr(this, Native.Z3_mk_re_union(nCtx, (uint)t.Length, AST.ArrayToNative(t)));
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}
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#endregion
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#region Pseudo-Boolean constraints
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/// <summary>
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@ -4448,6 +4672,26 @@ namespace Microsoft.Z3
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throw new Z3Exception("Context mismatch");
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}
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[Pure]
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internal void CheckContextMatch(Z3Object other1, Z3Object other2)
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{
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Contract.Requires(other1 != null);
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Contract.Requires(other2 != null);
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CheckContextMatch(other1);
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CheckContextMatch(other2);
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}
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[Pure]
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internal void CheckContextMatch(Z3Object other1, Z3Object other2, Z3Object other3)
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{
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Contract.Requires(other1 != null);
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Contract.Requires(other2 != null);
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Contract.Requires(other3 != null);
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CheckContextMatch(other1);
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CheckContextMatch(other2);
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CheckContextMatch(other3);
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}
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[Pure]
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internal void CheckContextMatch(Z3Object[] arr)
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{
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