Added a Read from stdin function and a convert one

Author: lucascompython

CritLang/CommandLineArgs.cs

@@ -2,6 +2,12 @@
 {
     internal class CommandLineArgs
     {
+        /// <summary>
+        /// Parse the arguments passed to the program.
+        /// </summary>
+        /// <param name="args"></param>
+        /// <param name="version"></param>
+        /// <returns></returns>
         public static string Parse(string[] args, string version)
         {
             foreach (var arg in args)

CritLang/Content/Crit.g4

@@ -5,6 +5,7 @@ program: line* EOF;
 
 line: statement | ifBlock | whileBlock;
 
+
 statement: (assignment|functionCall) ';';
 
 ifBlock: 'if' expression block ('else' elseIfBlock);
@@ -31,6 +32,7 @@ expression
 	| expression addOp expression		#additiveExpression
 	| expression compareOp expression	#comparisonExpression
 	| expression boolOp expression	    #booleanExpression
+	// | expression INCREMENTOP			#incrementExpression TODO add incrementOP
 	;
 
 
@@ -52,11 +54,13 @@ array: '[' (constant (',' constant)*)? ']';
 //index: '[' INTEGER ']';
 NULL: 'null';
 
+INDEX: '[' IDENTIFIER ']' | '[' INTEGER ']';
+INCREMENTOP: '++' | '--';
 
 block: '{' line* '}';
 
 WS:  [ \t\r\n]+ -> skip;
-IDENTIFIER: [a-zA-Z_][a-zA-Z0-9_]* ('[' IDENTIFIER ']' | '[' INTEGER ']')* ;
+IDENTIFIER: [a-zA-Z_][a-zA-Z0-9_]* (INDEX)* ;
 
 Comment
   :  '#' ~( '\r' | '\n' )*

CritLang/Content/test.crit

@@ -1,25 +1,22 @@
-ola = 5;
-
-
-
-ola *= 2;
-
-ola /= 3;
-
-ola -= 1.3333;
-
-ola += 3;
-
-ola %= 2
-
-WriteLine(ola);
-
+
+str_num1 = ReadLine("Digite um numero: ");
+str_num2 = ReadLine("Digite outro numero: ");
 
+int_num1 = Convert(str_num1, "int");
+int_num2 = Convert(str_num2, "int");
 
+WriteLine(int_num1 + int_num2);
 
 
+lista = [1, 2, "tres", 69];
 
+num = 0;
 
+while num < Len(lista) {
+	WriteLine(lista[num]);
+	num += 1;
+}
 
 
+WriteLine("FINAL");
 

CritLang/CritVisitor.cs

@@ -1,4 +1,5 @@
 using System.Globalization;
+using System.Reflection.Metadata;
 using CritLang.Content;
 
 namespace CritLang;
@@ -11,20 +12,65 @@ public class CritVisitor: CritBaseVisitor<object?>
 
     public CritVisitor()
     {
-        //GLOBAL FUNCTIONs / VARIABLES
+        //Math Functions
         Variables["PI"] = Math.PI;
         Variables["Sqrt"] = new Func<object?[], object?>(Sqrt);
         Variables["Pow"] = new Func<object?[], object?>(Pow);
 
+        //Console Functions
         Variables["Write"] = new Func<object?[], object?>(Write);
         Variables["WriteLine"] = new Func<object?[], object?>(WriteLine);
+        Variables["ReadLine"] = new Func<object?[], object?>(ReadLine);
+
+        //Array Functions
         Variables["Sum"] = new Func<object?[], object?>(SumArr);
         Variables["Add"] = new Func<object?[], object?>(AddArr);
         Variables["Remove"] = new Func<object?[], object?>(RemoveArr);
         Variables["Len"] = new Func<object?[], object?>(LenArr);
+
+
+        //Gerenal Functions
+        Variables["Convert"] = new Func<object?[], object?>(ConvertTo);
+
     }
 
 
+    public static object? ConvertTo(object?[] args)
+    {
+        if (args.Length != 2)
+        {
+            throw new Exception("ConvertTo expects 2 arguments, first one the variable to convert to and the second one being the type.");
+        }
+
+        string[] typeOptions = new[] { "int", "float", "string", "bool" };
+        if (!typeOptions.Contains(args[1]!.ToString()!))
+            throw new Exception($"Invalid type...\nMust be one of the following types: {string.Join(", ", typeOptions)}");
+
+        return args[1]!.ToString() switch
+        {
+            "int" => Convert.ToInt32(args[0]),
+            "float" => Convert.ToSingle(args[0]),
+            "string" => Convert.ToString(args[0]),
+            "bool" => Convert.ToBoolean(args[0]),
+            _ => throw new Exception("Invalid type...")
+        };
+    }
+
+    
+    private static object? ReadLine(object?[] args)
+    {
+        if (args.Length != 1)
+        {
+            throw new Exception("ReadLine expects 1 arguments, being the text to prompt to the use.");
+        }
+
+        string text = args[0]!.ToString()!;
+        Console.Write(text);
+        return Console.ReadLine();
+
+    }
+    
+
     private static object? RemoveArr(object?[] args)
     {
         if (args.Length != 2)
@@ -251,10 +297,8 @@ public CritVisitor()
     public override object? VisitIdentifierExpression(CritParser.IdentifierExpressionContext context)
     {
         var varName = context.IDENTIFIER().GetText();
-        
         if (varName.Contains('[') && varName.Contains(']'))
         {
-
             string[] variableHelper = varName.Replace("]", string.Empty).Split('[');
             string varWithoutIndex = variableHelper[0];
             string index = variableHelper[1];
@@ -277,6 +321,25 @@ public CritVisitor()
                 throw new Exception($"Variable {varWithoutIndex} not found");
             }
         }
+        
+
+        //TODO ADD SOMETHING LIKE THIS
+        //if (varName.Contains('.'))
+        //{az
+        //    string[] variableHelper = varName.Split('.');
+        //    string varWithoutIndex = variableHelper[0];
+        //    string index = variableHelper[1];
+        //    var variable = Variables[varWithoutIndex];
+        //    if (variable is not null)
+        //    {
+        //        var value = variable.GetType().GetProperty(index).GetValue(variable);
+        //        return value;
+        //    }
+        //    else
+        //    {
+        //        throw new Exception($"Variable {varWithoutIndex} not found");
+        //    }
+        //}
 
         if (!Variables.ContainsKey(varName))
             throw new Exception($"Variable '{varName}' is not defined");

CritLang/Program.cs

@@ -2,7 +2,7 @@
 using CritLang;
 using CritLang.Content;
 
-string VERSION = "v0.1.7-beta";
+string VERSION = "v0.1.8-beta";
 
 string fileName = CommandLineArgs.Parse(args, VERSION);
 
@@ -30,7 +30,7 @@
 var critLexer = new CritLexer(inputStream);
 var commonTokenStream = new CommonTokenStream(critLexer);
 var critParser = new CritParser(commonTokenStream);
-var chatContext = critParser.program();
+var critContext = critParser.program();
 var visitor = new CritVisitor();
 
-visitor.Visit(chatContext);
+visitor.Visit(critContext);