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Helper.cs
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Helper.cs
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using System;
using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
namespace MkFn {
public partial class MkFn {
/*
newならtrueを返します。
*/
public static bool IsNew(Term t) {
return t is Apply && t.AsApply().FunctionApp.VarRef == MkFn.Singleton.NewFnc;
}
/*
Rangeならtrueを返します。
*/
public static bool IsRange(Term t) {
return t is Apply && t.AsApply().FunctionApp.VarRef == MkFn.Singleton.RangeFnc;
}
/*
tならtrueを返します。
*/
public static bool Is_t(object obj) {
if(obj is Variable) {
return (obj as Variable).Name == "t";
}
else if (obj is Reference) {
// 変数参照の場合
return (obj as Reference).Name == "t";
}
return false;
}
/*
Tならtrueを返します。
*/
public static bool Is_T(object obj) {
if (obj is Variable) {
return (obj as Variable).Name == "T";
}
else if (obj is Reference) {
// 変数参照の場合
return (obj as Reference).Name == "T";
}
return false;
}
/*
t+1ならtrueを返します。
*/
public static bool Is_t_plus(Term t) {
if( t is Apply && t.AsApply().FunctionApp.VarRef == MkFn.Singleton.AddFnc) {
Apply app = t as Apply;
if(app.Args.Length == 2 && app.Args[0] is Reference && (app.Args[0] as Reference).Name == MkFn.Singleton.t_var.Name) {
if (app.Args[1] is Number && app.Args[1].Value == 1) {
return true;
}
}
}
return false;
}
/*
t-1ならtrueを返します。
*/
public static bool Is_t_minus(Term t) {
if (t is Apply && t.AsApply().FunctionApp.VarRef == MkFn.Singleton.AddFnc) {
Apply app = t as Apply;
if (app.Args.Length == 2 && app.Args[0] is Reference && (app.Args[0] as Reference).Name == MkFn.Singleton.t_var.Name) {
if (app.Args[1] is Number && app.Args[1].Value == -1) {
return true;
}
}
}
return false;
}
Apply Range(Term start, Term end) {
return new Apply(RangeFnc, start, end);
}
Apply Intersect(Term t1, Term t2) {
if (t1 is Apply && t2 is Apply) {
// 関数適用の場合
Apply app1 = t1 as Apply;
Apply app2 = t2 as Apply;
if (app1.FunctionApp.VarRef == RangeFnc && app2.FunctionApp.VarRef == RangeFnc) {
Apply min = new Apply(maxFnc, new Term[] { MinRange(t1), MinRange(t2) });
Apply max = new Apply(minFnc, new Term[] { MaxRange(t1), MaxRange(t2) });
return Range(min, max);
}
}
return null;
}
Term MinRange(Term rng) {
if (rng is Apply) {
// 関数適用の場合
Apply app = rng as Apply;
if (app.FunctionApp.VarRef == RangeFnc) {
if (app.Args.Length == 1) {
return Zero();
}
else {
return app.Args[0];
}
}
}
throw new Exception();
}
Term MaxRange(Term rng) {
if (rng is Apply) {
// 関数適用の場合
Apply app = rng as Apply;
if (app.FunctionApp.VarRef == RangeFnc) {
if (app.Args.Length == 1) {
return app.Args[0];
}
else {
return app.Args[1];
}
}
}
throw new Exception();
}
Apply Diff(Term t, Reference r) {
return new Apply(DiffFnc, new Term[] { t, r });
}
static Term[] VariableToReference(object[] args) {
return (from x in args select (Term)(x is Variable ? new Reference(x as Variable) : x as Term)).ToArray();
}
static Apply Mul(params object[] args) {
return new Apply(new Reference(Singleton.MulFnc), VariableToReference(args));
}
static Apply Div(params object[] args) {
return new Apply(new Reference(Singleton.DivFnc), VariableToReference(args));
}
static Apply Add(params object[] args) {
return new Apply(new Reference(Singleton.AddFnc), VariableToReference(args));
}
Apply Sub(params object[] args) {
Term[] v = VariableToReference(args);
for (int i = 1; i < v.Length; i++) {
v[i].Value *= -1;
}
return new Apply(new Reference(AddFnc), v);
}
public static int[] Range(int n) {
int[] v = new int[n];
for (int i = 0; i < n; i++) {
v[i] = i;
}
return v;
}
Term SetParent(Term t1) {
return TraverseRep(t1,
delegate (object obj, out object ret) {
ret = obj;
return false;
}) as Term;
}
/*
内部の変数参照のリストを返します。
*/
Reference[] EnumReference(object root) {
List<Reference> v = new List<Reference>();
Traverse(root,
delegate (object obj) {
if (obj is Reference) {
// 変数参照の場合
v.Add(obj as Reference);
}
});
return v.ToArray();
}
/*
項を含む文を返します。
*/
Statement ParentStatement(Term t1) {
for (object obj = t1.Parent; ;) {
Debug.Assert(obj != null);
if (obj is Statement) {
// 文の場合
return obj as Statement;
}
else if (obj is Term) {
// 項の場合
obj = (obj as Term).Parent;
}
else if (obj is Variable) {
// 変数の場合
obj = (obj as Variable).ParentVar;
}
else {
Debug.Assert(false);
}
}
}
/*
文の祖先のForEachのリストを返します。
*/
ForEach[] AncestorForEach(Statement stmt) {
List<ForEach> vfor = new List<ForEach>();
Debug.Assert(stmt.ParentStmt is ForEach);
ForEach for1 = stmt.ParentStmt as ForEach;
vfor.Add(for1);
while (for1.ParentStmt is ForEach) {
for1 = for1.ParentStmt as ForEach;
vfor.Add(for1);
}
Debug.Assert(for1.ParentStmt is BlockStatement);
// 1番外側のForEachがリストの最初になるように順序を反転させます。
vfor.Reverse();
return vfor.ToArray();
}
/*
木構造を走査します。
*/
public static void Traverse(object obj, NaviAction before, NaviAction after = null) {
if (obj == null) {
return;
}
if (before != null) {
before(obj);
}
if (obj is Term) {
// 項の場合
if (obj is Reference) {
// 変数参照の場合
Reference r1 = obj as Reference;
if (r1.Indexes != null) {
foreach (Term t in r1.Indexes) {
Traverse(t, before, after);
}
}
}
else if (obj is Number) {
// 数値定数の場合
}
else if (obj is Apply) {
// 関数適用の場合
Apply app = obj as Apply;
Traverse(app.FunctionApp, before, after);
foreach (Term t in app.Args) {
Traverse(t, before, after);
}
}
else if (obj is LINQ) {
// LINQの場合
LINQ lnq = obj as LINQ;
foreach (Variable v in lnq.Variables) {
Traverse(v, before, after);
}
Traverse(lnq.Select, before, after);
Traverse(lnq.Aggregate, before, after);
}
else {
Debug.Assert(false);
}
}
else if (obj is Variable) {
// 変数の場合
Variable v = obj as Variable;
Traverse(v.Domain, before, after);
if (obj is Function) {
// 関数の場合
Function fnc = obj as Function;
foreach (Variable p in fnc.Params) {
Traverse(p, before, after);
}
Traverse(fnc.BodyStatement, before, after);
}
}
else if (obj is Statement) {
// 文の場合
if (obj is Assignment) {
Assignment asn = obj as Assignment;
Traverse(asn.Left, before, after);
Traverse(asn.Right, before, after);
}
else if (obj is Return) {
// returnの場合
Return ret = obj as Return;
Traverse(ret.Value, before, after);
}
else if (obj is ForEach) {
// foreachの場合
ForEach for1 = obj as ForEach;
foreach(Variable va in for1.LoopVariables) {
Traverse(va, before, after);
}
foreach (Statement s in for1.Statements) {
Traverse(s, before, after);
}
}
else if (obj is BlockStatement) {
// ブロック文の場合
BlockStatement blc1 = obj as BlockStatement;
foreach (Statement s in blc1.Statements) {
Traverse(s, before, after);
}
}
else {
Debug.Assert(false);
}
}
else if (obj is Class) {
// クラスの場合
Class cls = obj as Class;
foreach (Variable fld in cls.Fields) {
Traverse(fld, before, after);
}
foreach (Function fnc in cls.Functions) {
Traverse(fnc, before, after);
}
}
else {
Debug.Assert(false);
}
if (after != null) {
after(obj);
}
}
/*
木構造を走査してノードを置換します。
*/
object TraverseRep(object obj, NaviFnc before, NaviFnc after = null) {
if (obj == null) {
return null;
}
object ret = obj;
if (before != null) {
bool done = before(obj, out ret);
if (done) {
return ret;
}
}
if (obj is Term) {
// 項の場合
if (obj is Reference) {
// 変数参照の場合
Reference r1 = obj as Reference;
if (r1.Indexes != null) {
r1.Indexes = (from t in r1.Indexes select TraverseRep(t, before, after) as Term).ToArray();
foreach (Term t in r1.Indexes) {
t.Parent = obj;
}
}
}
else if (obj is Number) {
// 数値定数の場合
}
else if (obj is Apply) {
// 関数適用の場合
Apply app = obj as Apply;
app.FunctionApp = TraverseRep(app.FunctionApp, before, after) as Reference;
app.Args = (from t in app.Args select TraverseRep(t, before, after) as Term).ToArray();
app.FunctionApp.Parent = app;
foreach (Term t in app.Args) {
t.Parent = obj;
}
}
else if (obj is LINQ) {
// LINQの場合
LINQ lnq = obj as LINQ;
lnq.Variables = (from v in lnq.Variables select TraverseRep(v, before, after) as Variable).ToArray();
lnq.Select = TraverseRep(lnq.Select, before, after) as Term;
lnq.Aggregate = TraverseRep(lnq.Aggregate, before, after) as Reference;
foreach (Variable v in lnq.Variables) {
v.ParentVar = obj;
}
lnq.Select.Parent = obj;
if (lnq.Aggregate != null) {
lnq.Aggregate.Parent = obj;
}
}
else {
Debug.Assert(false);
}
}
else if (obj is Variable) {
// 変数の場合
Variable v = obj as Variable;
v.Domain = TraverseRep(v.Domain, before, after) as Term;
if (v.Domain != null) {
v.Domain.Parent = obj;
}
if (obj is Function) {
// 関数の場合
Function fnc = obj as Function;
fnc.Params = (from p in fnc.Params select TraverseRep(p, before, after) as Variable).ToList();
fnc.BodyStatement = TraverseRep(fnc.BodyStatement, before, after) as BlockStatement;
foreach (Variable p in fnc.Params) {
p.ParentVar = fnc;
}
fnc.BodyStatement.ParentStmt = fnc;
}
}
else if (obj is Statement) {
// 文の場合
if (obj is Assignment) {
Assignment asn = obj as Assignment;
asn.Left = TraverseRep(asn.Left, before, after) as Reference;
asn.Right = TraverseRep(asn.Right, before, after) as Term;
asn.Left.Parent = obj;
asn.Right.Parent = obj;
}
else if (obj is Return) {
// returnの場合
Return ret_stmt = obj as Return;
ret_stmt.Value = TraverseRep(ret_stmt.Value, before, after) as Term;
if (ret_stmt.Value != null) {
ret_stmt.Value.Parent = obj;
}
}
else if (obj is ForEach) {
// foreachの場合
ForEach for1 = obj as ForEach;
for1.LoopVariables = (from va in for1.LoopVariables select TraverseRep(va, before, after) as Variable).ToList();
for1.Statements = (from s in for1.Statements select TraverseRep(s, before, after) as Statement).ToList();
foreach(Variable va in for1.LoopVariables) {
va.ParentVar = obj;
}
foreach (Statement stmt in for1.Statements) {
stmt.ParentStmt = obj;
}
}
else if (obj is BlockStatement) {
// ブロック文の場合
BlockStatement blc1 = obj as BlockStatement;
blc1.Statements = (from s in blc1.Statements select TraverseRep(s, before, after) as Statement).ToList();
foreach (Statement stmt in blc1.Statements) {
stmt.ParentStmt = obj;
}
}
else {
Debug.Assert(false);
}
}
else if (obj is Class) {
// クラスの場合
Class cls = obj as Class;
cls.Fields = (from fld in cls.Fields select TraverseRep(fld, before, after) as Variable).ToList();
cls.Functions = (from fnc in cls.Functions select TraverseRep(fnc, before, after) as Function).ToList();
foreach (Variable fld in cls.Fields) {
fld.ParentVar = cls;
}
foreach (Function fnc in cls.Functions) {
fnc.ParentVar = cls;
}
}
else {
Debug.Assert(false);
}
if (after != null) {
after(obj, out ret);
}
return ret;
}
/*
木構造に含まれる変数参照のリストを返します。
*/
public static List<Reference> AllRefs(object root) {
List<Reference> all_refs = new List<Reference>();
MkFn.Traverse(root,
delegate (object obj) {
if (obj is Reference) {
// 変数参照の場合
all_refs.Add(obj as Reference);
}
});
return all_refs;
}
/*
木構造に含まれる変数参照のリストを返します。
*/
public static List<object> All(object root, Type tp) {
List<object> alls = new List<object>();
MkFn.Traverse(root,
delegate (object obj) {
if (tp.IsInstanceOfType(obj)) {
// 変数参照の場合
alls.Add(obj);
}
});
return alls;
}
public static List<T> All<T>(object root) {
List<T> alls = new List<T>();
MkFn.Traverse(root,
delegate (object obj) {
if (obj is T) {
// 変数参照の場合
alls.Add((T)obj);
}
});
return alls;
}
static bool EqList(IEnumerable e1, IEnumerable e2) {
List<object> v1 = new List<object>();
IEnumerator enum1 = e1.GetEnumerator();
while (enum1.MoveNext()) {
v1.Add(enum1.Current);
}
List<object> v2 = new List<object>();
IEnumerator enum2 = e2.GetEnumerator();
while (enum2.MoveNext()) {
v2.Add(enum2.Current);
}
if(v1.Count != v2.Count) {
return false;
}
while(v1.Count != 0) {
object o1 = v1[0];
v1.RemoveAt(0);
int idx = v2.IndexOf(o1);
if(idx == -1) {
return false;
}
v2.RemoveAt(idx);
}
return true;
}
}
public class TermEqualityComparer : IEqualityComparer<Term> {
bool IEqualityComparer<Term>.Equals(Term x, Term y) {
return x.Eq(y);
}
int IEqualityComparer<Term>.GetHashCode(Term obj) {
return obj.HashCode();
}
}
}