Merge pull request #2 from helperf/main

added "typedef" operator

Author: bas1c1

SourceCode/Parser/Lexer.cs

@@ -187,6 +187,11 @@ private void tokenizeWord()
             string word = buffer.ToString();
             switch (word)
             {
+                case "typedef": 
+                    {
+                        addToken(TokenType.TYPEDEF);
+                        break;
+                    }
                 case "inst":
                     {
                         addToken(TokenType.INST_ENUM);

SourceCode/Parser/Parser.cs

@@ -202,6 +202,59 @@ private Statement assignmentStatement()
                 return new AssignmentStatement(variable, expression());
             }
 
+            if (current.getType() == TokenType.TYPEDEF)
+            {
+                consume(TokenType.TYPEDEF);
+                string type = consume(TokenType.WORD).getText();
+                string variable = consume(TokenType.WORD).getText();
+                consume(TokenType.EQ);
+                AssignmentStatement assignmentStatement = new AssignmentStatement(variable, expression(), true);
+                switch (type)
+                {
+                    case "int":
+                        {
+                            assignmentStatement.value = new NumberValue(0);
+                            break;
+                        }
+                    case "enum":
+                        {
+                            assignmentStatement.value = new EnumValue(new Dictionary<string, Value>());
+                            break;
+                        }
+                    case "string":
+                        {
+                            assignmentStatement.value = new StringValue(null);
+                            break;
+                        }
+                    case "dict":
+                        {
+                            assignmentStatement.value = new DictionaryValue(0);
+                            break;
+                        }
+                    case "stack":
+                        {
+                            assignmentStatement.value = new StackValue(0);
+                            break;
+                        }
+                    case "bool":
+                        {
+                            assignmentStatement.value = new BoolValue(true);
+                            break;
+                        }
+                    case "obj":
+                        {
+                            assignmentStatement.value = new ObjectValue(null);
+                            break;
+                        }
+                    case "arr":
+                        {
+                            assignmentStatement.value = new ArrayValue(0);
+                            break;
+                        }
+                }
+                return assignmentStatement;
+            }
+
             if (current.getType() == TokenType.WORD && get(1).getType() == TokenType.WORD && get(2).getType() == TokenType.DDOTEQ)
             {
                 string enums = consume(TokenType.WORD).getText();

SourceCode/Parser/TokenType.cs

@@ -45,6 +45,7 @@ public enum TokenType
         STATEMENT,
         SWITCH,
         CASE,
+        TYPEDEF,
 
         STAREQ,
         SLASHEQ,

SourceCode/ast/AssignmentStatement.cs

@@ -1,4 +1,4 @@
-using OwnLang.ast.lib;
+using OwnLang.ast.lib;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -11,17 +11,72 @@ class AssignmentStatement : Statement
     {
         private string variable;
         private Expression expression;
+        private bool isTypedef;
+        public Value value;
 
-        public AssignmentStatement(string variable, Expression expression)
+        public AssignmentStatement(string variable, Expression expression, bool isTypedef = false)
         {
             this.variable = variable;
             this.expression = expression;
+            this.isTypedef = isTypedef;
         }
 
         public void execute()
         {
-            // expression.eval()
-            Value result = expression.eval();
+            Value result;
+            if (isTypedef)
+            {
+                if (value is NumberValue)
+                {
+                    result = (NumberValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is BoolValue)
+                {
+                    result = (BoolValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is StringValue)
+                {
+                    result = (StringValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is EnumValue)
+                {
+                    result = (EnumValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is ObjectValue)
+                {
+                    result = (ObjectValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is ArrayValue)
+                {
+                    result = (ArrayValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is StackValue)
+                {
+                    result = (StackValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+                if (value is DictionaryValue)
+                {
+                    result = (DictionaryValue)expression.eval();
+                    Variables.set(variable, result);
+                    return;
+                }
+
+            }
+            result = expression.eval();
             Variables.set(variable, result);
         }