MainClass

src/Calculator.fu

@@ -1,16 +1,5 @@
-public static class Calculator
-{
-    public static void Main(string[] args){
-        string() joined = "";
-        foreach(string arg in args){
-            joined += arg;
-        }
-        double rezult = Calculate(joined);
-        Console.WriteLine(rezult);
-    }
-
-    public static double Calculate(string exprStr)
-    {
+public static class Calculator {
+    public static double Calculate(string exprStr) {
         Lexer() lexer;
         List<Token()> tokens = lexer.Lex(exprStr);
         // lexer.PrintTokens();

src/Expressions/FunctionCallExpression.fu

@@ -1,5 +1,4 @@
-abstract class FunctionCallExpression : IExpression
-{
+abstract class FunctionCallExpression : IExpression {
     IExpression X;
 
     internal void Init!(IExpression x){

src/Expressions/IExpression.fu

@@ -1,4 +1,3 @@
-abstract class IExpression
-{
+abstract class IExpression {
     internal abstract double Calculate();
 }

src/Expressions/NumericalExpression.fu

@@ -1,5 +1,4 @@
-class NumericExpression : IExpression
-{
+class NumericExpression : IExpression {
     double N;
 
     internal void Init!(double n){

src/Expressions/OperatorExpression.fu

@@ -1,5 +1,4 @@
-abstract class OperatorExpression : IExpression
-{
+abstract class OperatorExpression : IExpression {
     IExpression A;
     IExpression B;
 

src/Lexer.fu

@@ -1,7 +1,5 @@
-class Lexer
-{
+class Lexer {
     string ExprStr;
-
     List<Token()>() TokenStorage;
     int tokType = Token.Type_Number;
     int tokBegin = 0;
@@ -39,10 +37,8 @@ class Lexer
     internal List<Token()> Lex!(string exprStr){
         ExprStr = exprStr;
 
-        while (i < ExprStr.Length)
-        {
-            switch (ExprStr[i])
-            {
+        while (i < ExprStr.Length) {
+            switch (ExprStr[i]) {
                 // end token, add new predifined token and move next
                 case '(': AddStaticToken(TokBracketOpen); break;
                 case ')': AddStaticToken(TokBracketClose); break;
@@ -75,10 +71,8 @@ class Lexer
         return TokenStorage;
     }
 
-    void TryEndToken!()
-    {
-        if (tokBegin != i)
-        {
+    void TryEndToken!() {
+        if (tokBegin != i) {
             Token() tok = Token.Create(ExprStr, tokBegin, i - tokBegin, tokType);
             TokenStorage.Add();
             TokenStorage[TokenStorage.Count-1] = tok;
@@ -87,8 +81,7 @@ class Lexer
         }
     }
 
-    void AddStaticToken!(Token() tok)
-    {
+    void AddStaticToken!(Token() tok) {
         TryEndToken();
         TokenStorage.Add();
         TokenStorage[TokenStorage.Count-1] = tok;

src/MainClass.fu

@@ -0,0 +1,15 @@
+public static class MainClass {
+    public static void Main(string[] args){
+        #if CS
+        native {
+            System.Globalization.CultureInfo.DefaultThreadCurrentCulture =                System.Globalization.CultureInfo.InvariantCulture;
+        }
+        #endif
+        string() joined = "";
+        foreach(string arg in args){
+            joined += arg;
+        }
+        double rezult = Calculator.Calculate(joined);
+        Console.WriteLine(rezult);
+    }
+}

src/Parser.fu

@@ -1,19 +1,18 @@
-class Parser
-{
+class Parser {
     List<Token()> TokenStorage;
     IExpression# RootExpression;
     TokenLinkedList() TokensInRPN;
     Token() TokZero;
 
     internal Parser(){
-        NumericExpression# nan = new NumericExpression();
-        nan.Init(Math.NaN);
-        RootExpression = nan;
+        RootExpression = new NumericExpression(); // NaN
         TokZero = Token.Create("0", 0, 1, Token.Type_Number);
     }
 
     internal IExpression# Parse!(List<Token()> tokens){
         TokenStorage = tokens;
+        if(tokens.Count == 0)
+            return RootExpression; // NaN
         SortTokensInRPN();
         BuildExpressionTree();
         return RootExpression;
@@ -133,6 +132,7 @@ class Parser
 
         if(expressionStack.Count == 1)
             RootExpression = expressionStack.Pop();
+        else RootExpression = new NumericExpression(); // NaN
     }
 
     // returns the number or NaN

src/Token.fu

@@ -1,12 +1,11 @@
-class Token
-{
+class Token {
     string Str;
     int StartIndex;
     int Length;
     // It is not a enum because there is no way to convert enum value to int in Fusion.
-    // The Type is also the priority of the token in calculation (see Parser). 
+    // The Type is also the priority of the token in calculation (see Parser).
     int Type;
-
+    
     public const int Type_OperatorPow=10;
     public const int Type_OperatorMul=9;
     public const int Type_OperatorMod=8;

src/TokenLinkedList.fu

@@ -43,7 +43,7 @@ class TokenLinkedList {
     }
 
     // Can be used by GraphViz to create node graph.
-    // GraphViz online: https://dreampuf.github.io/GraphvizOnline/  
+    // GraphViz online: https://dreampuf.github.io/GraphvizOnline/
     internal string() ToGraphVizCode() {
         string() s = "strict digraph {\n" +  /* directed graph with no multi-edges */
             "    start [shape=Mdiamond];\n" + /* 'start' node style */
@@ -73,4 +73,4 @@ class TokenLinkedList {
         s += "}";
         return s;
     }
-}
+}

src/TokenLinkedListNode.fu

@@ -23,4 +23,4 @@ class TokenLinkedListNode {
         Prev = next.GetPrev();
         next.SetPrev(this);
     }
-}
+}