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NameResolution.cs
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NameResolution.cs
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.IO;
using System.Diagnostics;
namespace MkFn {
public partial class MkFn {
/*
* 名前解決
*/
void ResolveName() {
// アプリのクラスに対し
foreach (Class cls in Layers) {
Debug.WriteLine("layer : {0}", cls.Name, "");
Traverse(cls,
null,
delegate (object obj) {
if (obj is Reference) {
// 変数参照の場合
Reference ref1 = obj as Reference;
if (ref1.VarRef == null) {
var vars = from v in GetVariables(ref1) where v.Name == ref1.Name select v;
if (vars.Any()) {
ref1.VarRef = vars.First();
}
else {
Debug.WriteLine("未定義 {0}", ref1.Name, "");
}
}
}
});
}
}
public List<Variable> GetVariables(Term trm) {
List<Variable> vars = new List<Variable>();
for (object obj = trm.Parent; ; ) {
Debug.Assert(obj != null);
object parent = null;
if (obj is Term) {
// 項の場合
if (obj is LINQ) {
// LINQの場合
vars.AddRange((obj as LINQ).Variables);
}
parent = (obj as Term).Parent;
}
else if (obj is Statement) {
// 文の場合
if (obj is ForEach) {
// foreachの場合
vars.AddRange((obj as ForEach).LoopVariables);
}
parent = (obj as Statement).ParentStmt;
}
else if (obj is Variable) {
// 変数の場合
if (obj is Function) {
// 関数の場合
vars.AddRange((obj as Function).Params);
}
parent = (obj as Variable).ParentVar;
}
else if (obj is Class) {
// クラスの場合
Class cls = (obj as Class);
vars.AddRange(cls.Fields);
vars.AddRange(cls.Functions);
if(cls.Parent == null) {
break;
}
parent = cls.Parent;
}
else {
Debug.Assert(false);
}
Debug.Assert(parent != null);
obj = parent;
}
return vars;
}
/*
型推論
*/
void TypeInference(object root) {
Traverse(root,
null,
delegate (object obj) {
if (obj is Term) {
// 項の場合
Term trm = obj as Term;
if (trm is Reference) {
// 変数参照の場合
Reference rf = trm as Reference;
if (rf.VarRef == NewFnc) {
return;
}
if (rf.Indexes == null) {
rf.TypeTerm = rf.VarRef.TypeVar;
}
else {
rf.TypeTerm = (rf.VarRef.TypeVar as ArrayType).ElementType;
}
}
else if (trm is Number) {
// 数値定数の場合
}
else if (trm is Apply) {
// 関数適用の場合
Apply app = trm as Apply;
if (IsNew(app)) {
trm.TypeTerm = GetArrayType(app.NewClass, app.Args.Length);
}
else if (app.FunctionApp.VarRef.TypeVar == ArgClass) {
Class tp1 = app.Args[0].TypeTerm;
for (int i = 1; i < app.Args.Length; i++) {
Class tp2 = app.Args[i].TypeTerm;
if (MkFn.Singleton.NumberTypeOrder(tp1) < MkFn.Singleton.NumberTypeOrder(tp2)) {
tp1 = tp2;
}
}
trm.TypeTerm = tp1;
}
else {
trm.TypeTerm = app.FunctionApp.VarRef.TypeVar;
}
}
else if (trm is LINQ) {
// LINQの場合
LINQ lnq = trm as LINQ;
Debug.Assert(lnq.Aggregate != null);
trm.TypeTerm = lnq.Select.TypeTerm;
}
else {
Debug.Assert(false);
}
Debug.Assert(trm.TypeTerm != null);
}
else if (obj is Variable) {
// 変数の場合
Variable va = obj as Variable;
if (va.TypeVar == null) {
if (va.Domain == null) {
throw new Exception();
}
else {
if (va.Domain.TypeTerm.DimCnt != 1) {
throw new Exception();
}
va.TypeVar = (va.Domain.TypeTerm as ArrayType).ElementType;
Debug.Assert(va.TypeVar != null);
}
}
}
});
}
}
}