diff options
| author |  rustanleino <unknown> | 2010-05-13 19:02:06 +0000 |
|---|---|---|
| committer | rustanleino <unknown> | 2010-05-13 19:02:06 +0000 |
| commit | a660fb79bf527b42e3238b1810143f4fc3f3b827 (patch) | |
| tree | 49ab2f1cdd38b97aaf8af0504fd32a986bbdd20f /Binaries | |
| parent | f34f3551a17f9971231cd5c8fec8f27b6f9337b7 (diff) | |
Dafny:
* Effectively make all in- and out-parameters of ghost methods ghosts.
* Added DafnyRuntime.cs back in, which is needed to run Dafny programs, but which, unfortunately, is currently not being used in the test suite (something we should address)
Diffstat (limited to 'Binaries')
| -rw-r--r-- | Binaries/DafnyRuntime.cs | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/Binaries/DafnyRuntime.cs b/Binaries/DafnyRuntime.cs new file mode 100644 index 00000000..982683b9 --- /dev/null +++ b/Binaries/DafnyRuntime.cs @@ -0,0 +1,221 @@ +using System.Numerics;
+using System.Collections.Generic;
+
+namespace Dafny
+{
+ public class Set<T>
+ {
+ Dictionary<T, bool> dict;
+ public Set() { }
+ Set(Dictionary<T, bool> d) {
+ dict = d;
+ }
+ public static Set<T> Empty {
+ get {
+ return new Set<T>(new Dictionary<T, bool>(0));
+ }
+ }
+ public static Set<T> FromElements(params T[] values) {
+ Dictionary<T, bool> d = new Dictionary<T, bool>(values.Length);
+ foreach (T t in values)
+ d.Add(t, true);
+ return new Set<T>(d);
+ }
+ public IEnumerable<T> Elements {
+ get {
+ return dict.Keys;
+ }
+ }
+ public bool Equals(Set<T> other) {
+ return dict.Count == other.dict.Count && IsSubsetOf(other);
+ }
+ public override bool Equals(object other) {
+ return other is Set<T> && Equals((Set<T>)other);
+ }
+ public override int GetHashCode() {
+ return dict.GetHashCode();
+ }
+ public bool IsProperSubsetOf(Set<T> other) {
+ return dict.Count < other.dict.Count && IsSubsetOf(other);
+ }
+ public bool IsSubsetOf(Set<T> other) {
+ if (other.dict.Count < dict.Count)
+ return false;
+ foreach (T t in dict.Keys) {
+ if (!other.dict.ContainsKey(t))
+ return false;
+ }
+ return true;
+ }
+ public bool IsSupersetOf(Set<T> other) {
+ return other.IsSubsetOf(this);
+ }
+ public bool IsProperSupersetOf(Set<T> other) {
+ return other.IsProperSubsetOf(this);
+ }
+ public bool IsDisjointFrom(Set<T> other) {
+ Dictionary<T, bool> a, b;
+ if (dict.Count < other.dict.Count) {
+ a = dict; b = other.dict;
+ } else {
+ a = other.dict; b = dict;
+ }
+ foreach (T t in a.Keys) {
+ if (b.ContainsKey(t))
+ return false;
+ }
+ return true;
+ }
+ public bool Contains(T t) {
+ return dict.ContainsKey(t);
+ }
+ public Set<T> Union(Set<T> other) {
+ if (dict.Count == 0)
+ return other;
+ else if (other.dict.Count == 0)
+ return this;
+ Dictionary<T, bool> a, b;
+ if (dict.Count < other.dict.Count) {
+ a = dict; b = other.dict;
+ } else {
+ a = other.dict; b = dict;
+ }
+ Dictionary<T, bool> r = new Dictionary<T, bool>();
+ foreach (T t in b.Keys)
+ r[t] = true;
+ foreach (T t in a.Keys)
+ r[t] = true;
+ return new Set<T>(r);
+ }
+ public Set<T> Intersect(Set<T> other) {
+ if (dict.Count == 0)
+ return this;
+ else if (other.dict.Count == 0)
+ return other;
+ Dictionary<T, bool> a, b;
+ if (dict.Count < other.dict.Count) {
+ a = dict; b = other.dict;
+ } else {
+ a = other.dict; b = dict;
+ }
+ Dictionary<T, bool> r = new Dictionary<T, bool>();
+ foreach (T t in a.Keys) {
+ if (b.ContainsKey(t))
+ r.Add(t, true);
+ }
+ return new Set<T>(r);
+ }
+ public Set<T> Difference(Set<T> other) {
+ if (dict.Count == 0)
+ return this;
+ else if (other.dict.Count == 0)
+ return this;
+ Dictionary<T, bool> r = new Dictionary<T, bool>();
+ foreach (T t in dict.Keys) {
+ if (!other.dict.ContainsKey(t))
+ r.Add(t, true);
+ }
+ return new Set<T>(r);
+ }
+ }
+ public class Sequence<T>
+ {
+ T[] elmts;
+ public Sequence() { }
+ Sequence(T[] ee) {
+ elmts = ee;
+ }
+ public static Sequence<T> Empty {
+ get {
+ return new Sequence<T>(new T[0]);
+ }
+ }
+ public static Sequence<T> FromElements(params T[] values) {
+ return new Sequence<T>(values);
+ }
+ public BigInteger Length {
+ get { return new BigInteger(elmts.Length); }
+ }
+ public T[] Elements {
+ get {
+ return elmts;
+ }
+ }
+ public T Select(BigInteger index) {
+ return elmts[(int)index];
+ }
+ public Sequence<T> Update(BigInteger index, T t) {
+ T[] a = (T[])elmts.Clone();
+ a[(int)index] = t;
+ return new Sequence<T>(a);
+ }
+ public bool Equals(Sequence<T> other) {
+ int n = elmts.Length;
+ return n == other.elmts.Length && EqualUntil(other, n);
+ }
+ public override bool Equals(object other) {
+ return other is Sequence<T> && Equals((Sequence<T>)other);
+ }
+ public override int GetHashCode() {
+ return elmts.GetHashCode();
+ }
+ bool EqualUntil(Sequence<T> other, int n) {
+ for (int i = 0; i < n; i++) {
+ if (!elmts[i].Equals(other.elmts[i]))
+ return false;
+ }
+ return true;
+ }
+ public bool IsProperPrefixOf(Sequence<T> other) {
+ int n = elmts.Length;
+ return n < other.elmts.Length && EqualUntil(other, n);
+ }
+ public bool IsPrefixOf(Sequence<T> other) {
+ int n = elmts.Length;
+ return n <= other.elmts.Length && EqualUntil(other, n);
+ }
+ public Sequence<T> Concat(Sequence<T> other) {
+ if (elmts.Length == 0)
+ return other;
+ else if (other.elmts.Length == 0)
+ return this;
+ T[] a = new T[elmts.Length + other.elmts.Length];
+ System.Array.Copy(elmts, 0, a, 0, elmts.Length);
+ System.Array.Copy(other.elmts, 0, a, elmts.Length, other.elmts.Length);
+ return new Sequence<T>(a);
+ }
+ public bool Contains(T t) {
+ int n = elmts.Length;
+ for (int i = 0; i < n; i++) {
+ if (t.Equals(elmts[i]))
+ return true;
+ }
+ return false;
+ }
+ public Sequence<T> Take(BigInteger n) {
+ int m = (int)n;
+ if (elmts.Length == m)
+ return this;
+ T[] a = new T[m];
+ System.Array.Copy(elmts, a, m);
+ return new Sequence<T>(a);
+ }
+ public Sequence<T> Drop(BigInteger n) {
+ if (n.IsZero)
+ return this;
+ int m = (int)n;
+ T[] a = new T[elmts.Length - m];
+ System.Array.Copy(elmts, m, a, 0, elmts.Length - m);
+ return new Sequence<T>(a);
+ }
+ }
+ public struct Pair<A, B>
+ {
+ public readonly A Car;
+ public readonly B Cdr;
+ public Pair(A a, B b) {
+ this.Car = a;
+ this.Cdr = b;
+ }
+ }
+}
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