[feature] 再见，编译原理

CompilerDesignIflr1/CompilerDesignIflr1.csproj

@@ -14,6 +14,9 @@
     <None Update="files\if-grammar.grammar">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Update="files\translateFile">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
   </ItemGroup>
 
 </Project>

CompilerDesignIflr1/LR1Closure.cs

@@ -1,9 +1,4 @@
-using System;
+using System.Text;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace CompilerDesignIFlr1
 {
@@ -32,32 +27,6 @@ namespace CompilerDesignIFlr1
 
         internal void CalculateProspects()
         {
-            //Queue<LR1Unit> queue = [];
-            //var startUnit = Units.Where(x=>x.Name == LR1Creator.StartSymbol).First();
-            //startUnit.Prospect.Add("End");
-
-            //queue.Enqueue(startUnit);
-            //while (queue.Count > 0)
-            //{
-            //    var unit = queue.Dequeue();
-            //    var left = unit.Name;
-            //    var units = UnitsHaveDotBefore(left);
-            //    var next = unit.Next();
-            //    if (next is not null && !LR1Creator.TokenUnit.ContainsKey(next))
-            //        foreach (var item in Units.Where(x => x.Name == next))
-            //            queue.Enqueue(item);
-            //    HashSet<string> prospect = units
-            //        .Select(x => GetProspectsOf(x))
-            //        .Aggregate(
-            //            new HashSet<string>(),
-            //            (set, x) =>
-            //            {
-            //                set.UnionWith(x);
-            //                return set;
-            //            }
-            //        );
-            //    unit.Prospect.UnionWith(prospect);
-            //}
 
             bool haveChange = true;
             while (haveChange)

CompilerDesignIflr1/LR1Creator.cs

@@ -1,12 +1,4 @@
-using System;
+namespace CompilerDesignIFlr1
-using System.Collections.Generic;
-using System.ComponentModel.DataAnnotations;
-using System.Dynamic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace CompilerDesignIFlr1
 {
     internal class LR1Creator
     {

CompilerDesignIflr1/LR1Table.cs

@@ -1,8 +1,4 @@
-using System;
+using System.Text;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
 
 namespace CompilerDesignIFlr1
 {
@@ -68,9 +64,11 @@ namespace CompilerDesignIFlr1
             sb.Append("ACTION: \n");
             foreach (var (key, value) in ACTION)
                 sb.Append(key).Append(": ").Append(value).Append(", ");
-            sb.Append("GOTO: \n");
+            if(GOTO.Count != 0)
+                sb.Append("\nGOTO: \n");
             foreach (var (key, value) in GOTO)
                 sb.Append(key).Append(": ").Append(value).Append(", ");
+            sb.Append('\n');
             return sb.ToString();
         }
 

CompilerDesignIflr1/LR1Unit.cs

@@ -1,8 +1,5 @@
-using System;
+using System.Diagnostics.SymbolStore;
-using System.Collections.Generic;
-using System.Linq;
 using System.Text;
-using System.Threading.Tasks;
 
 namespace CompilerDesignIFlr1
 {
@@ -10,6 +7,16 @@ namespace CompilerDesignIFlr1
     {
         internal LR1Unit() { }
 
+        internal static string LanguageMode = "English";
+        internal static Dictionary<string, string> EnglishToChinese = [];
+        internal static void Init(string filePath)
+        {
+            string fileContent = File.ReadAllText(filePath);
+            EnglishToChinese = fileContent
+                .Split('#')
+                .Select(x => x.Split(':').Select(x => x.Trim()).ToList()).Where(x=>x.Count == 2).ToList().ToDictionary(x => x[0], x => x[1]);
+        }
+
         internal LR1Unit(string name, string grammar)
         {
             Type = "Token";
@@ -49,7 +56,16 @@ namespace CompilerDesignIFlr1
             Grammar = grammar;
         }
 
-        public LR1Unit(int id, string type, string name, int quadrupleIndex, string value, HashSet<string> prospect, int pointPosition, List<string> grammar)
+        public LR1Unit(
+            int id,
+            string type,
+            string name,
+            int quadrupleIndex,
+            string value,
+            HashSet<string> prospect,
+            int pointPosition,
+            List<string> grammar
+        )
         {
             Id = id;
             Type = type;
@@ -62,7 +78,17 @@ namespace CompilerDesignIFlr1
         }
 
         internal LR1Unit Clone() =>
-            new LR1Unit(Id, Type, Name, 0, Value,new HashSet<string>(Prospect), PointPosition, [.. Grammar]);
+            new LR1Unit(
+                Id,
+                Type,
+                Name,
+                0,
+                Value,
+                new HashSet<string>(Prospect),
+                PointPosition,
+                [.. Grammar]
+            );
+
         internal int Id { get; set; } = -1;
         internal string Type { get; set; } = "";
         internal string Name { get; set; } = "";
@@ -88,22 +114,29 @@ namespace CompilerDesignIFlr1
 
         public override string ToString()
         {
+            string GetName(string s)
+            {
+                return LanguageMode switch
+                {
+                    "Chinese" => EnglishToChinese.TryGetValue(s, out var result) ? result : s,
+                    "English" => s,
+                    _ => throw new Exception("Language mode is not supported.")
+                };
+            }
             StringBuilder sb = new();
-            //if (Grammar.Count == 0)
-            //    return ".";
             sb.Append($"{Id, 2} ");
-            sb.Append(Name).Append(" ::= ");
+            sb.Append(GetName(Name)).Append(" ::= ");
             for (int i = 0; i < Grammar.Count; i++)
             {
                 if (PointPosition == i)
                     sb.Append(". ");
-                sb.Append(Grammar[i] + " ");
+                sb.Append(GetName(Grammar[i]) + " ");
             }
             if (PointPosition == Grammar.Count)
                 sb.Append('.');
             foreach (var item in Prospect)
             {
-                sb.Append(", " + item);
+                sb.Append(", " + GetName(item));
             }
             return sb.ToString();
         }

CompilerDesignIflr1/LexicalAnalysis.cs

@@ -1,12 +1,6 @@
-using System;
+using System.Text.RegularExpressions;
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Text.RegularExpressions;
-using System.Threading.Tasks;
-using CompilerDesignIFlr1;
 
-namespace CompilerDesignIflr1
+namespace CompilerDesignIFlr1
 {
     internal class LexicalAnalysis
     {

CompilerDesignIflr1/Program.cs

@@ -1,8 +1,9 @@
 // See https://aka.ms/new-console-template for more information
-using CompilerDesignIflr1;
 using CompilerDesignIFlr1;
 
 Console.WriteLine("Hello, World!");
+LR1Unit.Init("./files/translateFile");
+LR1Unit.LanguageMode = "Chinese";
 var grammarReader = new GrammarReader("./files/if-grammar.grammar");
 var lr1Creator = new LR1Creator(grammarReader);
 var lr1Table = new LR1Table(lr1Creator);
@@ -10,3 +11,4 @@ var lexicalAnalysis = new LexicalAnalysis(lr1Creator, "./files/code");
 var semanticAnalysis = new SemanticAnalysis();
 var stateMachine = new StateMachine(lr1Table, lexicalAnalysis, lr1Creator, semanticAnalysis);
 semanticAnalysis.PrintQuadruples();
+semanticAnalysis.OptimizeQuadruples();

CompilerDesignIflr1/SemanticAnalysis.cs

@@ -1,11 +1,4 @@
-using System;
+using System.Text;
-using System.Collections.Generic;
-using System.Linq;
-using System.Linq.Expressions;
-using System.Runtime.InteropServices.Marshalling;
-using System.Text;
-using System.Threading.Tasks;
-using static System.Runtime.InteropServices.JavaScript.JSType;
 
 namespace CompilerDesignIFlr1
 {
@@ -733,13 +726,155 @@ namespace CompilerDesignIFlr1
 
         internal void PrintQuadruples()
         {
+            Console.WriteLine("四元式：");
             for (int i = 0; i < Quadruples.Count; i++)
             {
-                Console.Write($"{i, 3}");
+                //Console.Write($"{i, 3}");
                 Console.WriteLine(Quadruples[i]);
             }
         }
 
+        internal void OptimizeQuadruples()
+        {
+            HashSet<int> basedOn = [];
+            bool CanBasedOn(Quadruple quadruple)
+            {
+                return quadruple.Operator != "=" || !quadruple.To.Name.StartsWith("@");
+            }
+            Identifier GetFinal(Identifier? identifier, int from)
+            {
+                if (identifier == null)
+                    return null!;
+                if (identifier.Type == IdentifierType.Literal)
+                {
+                    if (identifier.Value.StartsWith("@"))
+                    {
+                        for (int i = from - 1; i >= 0; i--)
+                        {
+                            if (Quadruples[i].To.Name == identifier.Value)
+                            {
+                                return Identifier.Literal(Quadruples[i].To.Value);
+                            }
+                        }
+                        throw new Exception("Failed to track identifier");
+                    }
+                    else
+                        return Identifier.Literal(identifier.Value);
+                }
+                if (identifier.Name.StartsWith("@"))
+                {
+                    for (int i = from - 1; i >= 0; i--)
+                    {
+                        if (Quadruples[i].To.Name == identifier.Name)
+                        {
+                            if (Quadruples[i].Operator == "=")
+                                return GetFinal(Quadruples[i].A, i);
+                            else
+                                return identifier;
+                        }
+                    }
+                    throw new Exception("Failed to track identifier");
+                }
+                else
+                    return identifier;
+            }
+            for (int i = 0; i < Quadruples.Count; i++)
+            {
+                if (CanBasedOn(Quadruples[i]))
+                {
+                    basedOn.Add(i);
+                    Quadruples[i].A = GetFinal(Quadruples[i].A, i);
+                    Quadruples[i].B = GetFinal(Quadruples[i].B, i);
+                }
+            }
+            List<Quadruple> afterList = basedOn.Order().Select(x => Quadruples[x].Clone()).ToList();
+            HashSet<int> reAddInAfterList = [];
+            for (int i = 1; i <= afterList.Count; i++)
+            {
+                reAddInAfterList.Add(i);
+                Quadruple quadruple = afterList[^i];
+                if (quadruple.Operator == "=" && quadruple.A.Name.StartsWith('@'))
+                {
+                    reAddInAfterList.Remove(i);
+                    bool find = false;
+                    for (i++; i <= afterList.Count; i++)
+                    {
+                        reAddInAfterList.Add(i);
+                        if (afterList[^i].To.Name == quadruple.A.Name)
+                        {
+                            afterList[^i].To = quadruple.To;
+                            find = true;
+                            break;
+                        }
+                    }
+                    if(!find)
+                        throw new Exception("Failed to track identifier");
+                }
+            }
+            afterList = reAddInAfterList.Order().Select(x => afterList[^x]).Reverse().ToList();
+            Dictionary<string, string> tempValueReplace = [];
+            // >x 时 回填到 y
+            Stack<(int, int)> addressReset = [];
+            int tempValueIndex = 0;
+            string GetNewTempName()
+            {
+                return "@T" + tempValueIndex++;
+            }
+            for (int i = 0; i < afterList.Count; i++)
+            {
+                var quadruple = afterList[i];
+                while (addressReset.Count > 0 && addressReset.Peek().Item1 < quadruple.Index)
+                    afterList[addressReset.Pop().Item2].To.Value = i + "";
+                quadruple.Index = i;
+                if (quadruple.A.Name.StartsWith("@"))
+                {
+                    if (tempValueReplace.TryGetValue(quadruple.A.Name, out string? newName))
+                        quadruple.A.Name = newName;
+                    else
+                    {
+                        tempValueReplace.Add(quadruple.A.Name, GetNewTempName());
+                        quadruple.A.Name = tempValueReplace[quadruple.A.Name];
+                    }
+                }
+                if (quadruple.B is not null && quadruple.B.Name.StartsWith("@"))
+                {
+                    if (tempValueReplace.TryGetValue(quadruple.B.Name, out string? newName))
+                        quadruple.B.Name = newName;
+                    else
+                    {
+                        tempValueReplace.Add(quadruple.B.Name, GetNewTempName());
+                        quadruple.B.Name = tempValueReplace[quadruple.B.Name];
+                    }
+                }
+                if (
+                    quadruple.To.Name.StartsWith("@")
+                    && quadruple.To.Type != IdentifierType.Address
+                )
+                {
+                    if (tempValueReplace.TryGetValue(quadruple.To.Name, out string? newName))
+                        quadruple.To.Name = newName;
+                    else
+                    {
+                        tempValueReplace.Add(quadruple.To.Name, GetNewTempName());
+                        quadruple.To.Name = tempValueReplace[quadruple.To.Name];
+                    }
+                }
+                if (quadruple.Operator.StartsWith('j'))
+                    addressReset.Push((int.Parse(quadruple.To.Value), i));
+            }
+            while (addressReset.Count > 0)
+                afterList[addressReset.Pop().Item2].To.Value = afterList.Count + "";
+            Console.WriteLine("After optimize.");
+            //foreach (int i in basedOn.Order().ToList())
+            //{
+            //    Console.WriteLine(Quadruples[i]);
+            //}
+            foreach (var t in afterList)
+            {
+                Console.WriteLine(t);
+            }
+        }
+
         internal static bool Assert(bool val) =>
             !val ? throw new Exception("Assertion failed.") : false;
 
@@ -892,7 +1027,7 @@ namespace CompilerDesignIFlr1
         internal Quadruple(string @operator, int index, Identifier a, Identifier? b, Identifier to)
         {
             Operator = @operator;
-            this.Index = index;
+            Index = index;
             A = a;
             B = b;
             To = to;
@@ -916,7 +1051,8 @@ namespace CompilerDesignIFlr1
                     return identifier.Name;
                 return identifier.Value;
             }
-            sb.Append('(')
+            sb.Append($"{Index, 3}")
+                .Append('(')
                 .Append(Operator.PadLeft(4, ' '))
                 .Append(',')
                 .Append(GetValue(A).PadLeft(4, ' '))

CompilerDesignIflr1/StateMachine.cs

@@ -1,11 +1,4 @@
-using System;
+namespace CompilerDesignIFlr1
-using System.Collections.Generic;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
-using CompilerDesignIflr1;
-
-namespace CompilerDesignIFlr1
 {
     internal class StateMachine
     {
@@ -27,6 +20,8 @@ namespace CompilerDesignIFlr1
         }
 
         internal void Compute()
+        {
+            try
             {
                 while (true)
                 {
@@ -34,6 +29,12 @@ namespace CompilerDesignIFlr1
                         break;
                 }
             }
+            catch (Exception e)
+            {
+                Console.WriteLine(e.Message);
+                Environment.Exit(1);
+            }
+        }
 
         internal bool ComputeOnce(LR1Unit unit)
         {

CompilerDesignIflr1/files/GrammarInChinese

@@ -0,0 +1,88 @@
+文法：
+key: Program
+     0 程序 ::= . 语句列表
+key: StatementList
+     1 语句列表 ::= . { Statement_0 }
+key: IfStatement
+     2 判断语句 ::= . If 条件部分 部分判断语句 Else 语句
+     3 判断语句 ::= . If 条件部分 语句
+key: PartIfStatement
+     4 部分判断语句 ::= . If 条件部分 部分判断语句 Else 部分判断语句
+     5 部分判断语句 ::= . 无判断语句
+key: ConditionPart
+     6 条件部分 ::= . ( 条件 )
+key: Condition
+     7 条件 ::= . 条件表达式 LogicalOperator_ConditionalExpression_0
+key: ConditionalExpression
+     8 条件表达式 ::= . 表达式 运算符 表达式
+     9 条件表达式 ::= . 表达式
+key: Expression
+    10 表达式 ::= . 项 AddLike_Term_0
+key: Statement
+    11 语句 ::= . 判断语句
+    12 语句 ::= . 无判断语句
+key: NoIfStatement
+    13 无判断语句 ::= . 赋值语句 ;
+    14 无判断语句 ::= . 变量定义 ;
+    15 无判断语句 ::= . { Statement_1 }
+    16 无判断语句 ::= . 常量定义 ;
+    17 无判断语句 ::= . ;
+key: AssignmentStatement
+    18 赋值语句 ::= . 标识符 = 表达式
+key: Term
+    19 项 ::= . 因子 MultiplyLike_Factor_0
+key: ConstantDefinition
+    20 常量定义 ::= . Const 变量定义
+key: VariableDefinition
+    21 变量定义 ::= . 类型 Identifier__AssignmentStatement_0 Comma_Identifier__Comma_AssignmentStatement_0
+key: Type
+    22 类型 ::= . Int
+    23 类型 ::= . Char
+key: Factor
+    24 因子 ::= . 标识符
+    25 因子 ::= . 数字
+    26 因子 ::= . 字符
+    27 因子 ::= . ( 表达式 )
+key: AddLike
+    28 类加运算符 ::= . +
+    29 类加运算符 ::= . -
+key: MultiplyLike
+    30 类乘运算符 ::= . *
+    31 类乘运算符 ::= . /
+    32 类乘运算符 ::= . %
+key: Number
+    33 数字 ::= . 无符号数字
+    34 数字 ::= . - 无符号数字
+    35 数字 ::= . + 无符号数字
+key: Operator
+    36 运算符 ::= . EqualTo
+    37 运算符 ::= . NotEqualTo
+    38 运算符 ::= . LessThan
+    39 运算符 ::= . GreaterThan
+    40 运算符 ::= . LessThanOrEqual
+    41 运算符 ::= . GreaterThanOrEqual
+key: LogicalOperator
+    42 逻辑运算符 ::= . And
+    43 逻辑运算符 ::= . Or
+key: Statement_0
+    44 Statement_0 ::= .
+    45 Statement_0 ::= . 语句 Statement_0
+key: LogicalOperator_ConditionalExpression_0
+    46 LogicalOperator_ConditionalExpression_0 ::= .
+    47 LogicalOperator_ConditionalExpression_0 ::= . 逻辑运算符 条件表达式 LogicalOperator_ConditionalExpression_0
+key: AddLike_Term_0
+    48 AddLike_Term_0 ::= .
+    49 AddLike_Term_0 ::= . 类加运算符 项 AddLike_Term_0
+key: Statement_1
+    50 Statement_1 ::= .
+    51 Statement_1 ::= . 语句 Statement_1
+key: MultiplyLike_Factor_0
+    52 MultiplyLike_Factor_0 ::= .
+    53 MultiplyLike_Factor_0 ::= . 类乘运算符 因子 MultiplyLike_Factor_0
+key: Identifier__AssignmentStatement_0
+    54 Identifier__AssignmentStatement_0 ::= . 标识符
+    55 Identifier__AssignmentStatement_0 ::= . 赋值语句
+key: Comma_Identifier__Comma_AssignmentStatement_0
+    56 Comma_Identifier__Comma_AssignmentStatement_0 ::= .
+    57 Comma_Identifier__Comma_AssignmentStatement_0 ::= . 逗号 标识符 Comma_Identifier__Comma_AssignmentStatement_0
+    58 Comma_Identifier__Comma_AssignmentStatement_0 ::= . 逗号 赋值语句 Comma_Identifier__Comma_AssignmentStatement_0

CompilerDesignIflr1/files/code

@@ -1,12 +1,4 @@
 {
-  int a =1*9+2;
+    const int a = 5;
-  if(a>9){
-    a=a+1;
-    if(9>1){
-    a=10;
-    }
-    a=2+2;
-  }
     
-
+    }
-}

CompilerDesignIflr1/files/if-grammar.grammar

@@ -93,8 +93,8 @@ LogicalOperator {
   Plus { "+" }
   Minus { "-" }
   Multiply { "*" }
-  Modulo { "%" }
   Divide { "/" }
+  Modulo { "%" }
   LParen { "(" }
   RParen { ")" }
   LBrace { "{" }

CompilerDesignIflr1/files/translateFile

@@ -0,0 +1,43 @@
+AddLike: 类加运算符 #
+AssignmentStatement: 赋值语句 #
+Char: Char #
+Character: 字符 #
+Comma: 逗号 #
+Condition: 条件 #
+ConditionalExpression: 条件表达式 #
+ConditionPart: 条件部分 #
+ConstantDefinition: 常量定义 #
+Const: Const #
+Divide: / #
+Else: Else #
+Equal: = #
+Expression: 表达式 #
+Factor: 因子 #
+Identifier: 标识符 #
+If: If #
+IfStatement: 判断语句 #
+Int: Int #
+LBrace: { #
+LParen: ( #
+Minus: - #
+Modulo: % #
+Multiply: * #
+MultiplyLike: 类乘运算符 #
+NoIfStatement: 无判断语句 #
+Number: 数字 #
+Operator: 运算符 #
+PartIfStatement: 部分判断语句 #
+Plus: + #
+Program: 程序 #
+RBrace: } #
+RParen: ) #
+Semicolon: ; #
+Statement: 语句 #
+StatementList: 语句列表 #
+String: 字符串 #
+Term: 项 #
+Type: 类型 #
+UnsignedNumber: 无符号数字 #
+VariableDefinition: 变量定义 #
+Whitespace: 空白字符 #
+LogicalOperator: 逻辑运算符 #