Added customisable label to table formatter

Author: tomc128

v2/BooleanExpressionParser/.vscode/launch.json

@@ -8,10 +8,10 @@
             "preLaunchTask": "build",
             "program": "${workspaceFolder}/bin/Debug/net6.0/BooleanExpressionParser.dll",
             "args": [
-                // "A.B",
-                // "A+B",
-                // "!(A+B+C)",
-                // "(((A.B&C) OR A) AND (NOT B + !C)) AND NOT D",
+                "A.B",
+                "A+B",
+                "!(A+B+C)",
+                "(((A.B&C) OR A) AND (NOT B + !C)) AND NOT D",
                 "!S.D_0 + D_1 AND S",
             ],
             "cwd": "${workspaceFolder}",

v2/BooleanExpressionParser/Formatter.cs

@@ -4,7 +4,7 @@ namespace BooleanExpressionParser;
 
 class Formatter
 {
-    public static string FormatInfixTokens(IEnumerable<Token> tokens)
+    public static string FormatTokens(IEnumerable<Token> tokens)
     {
         var sb = new StringBuilder();
 
@@ -16,36 +16,24 @@ public static string FormatInfixTokens(IEnumerable<Token> tokens)
         return sb.ToString();
     }
 
-    public static string FormatPrefixTokens(IEnumerable<Token> tokens)
-    {
-        var sb = new StringBuilder();
-
-        foreach (var token in tokens)
-        {
-            sb.Append(token.ToString());
-            sb.Append(" ");
-        }
-
-        return sb.ToString();
-    }
-
-    public static string FormatTruthTable(Ast ast, List<bool[]> table)
+    public static string FormatTruthTable(Ast ast, List<bool[]> table, string label="Result")
     {
         var sb = new StringBuilder();
 
         var variableLine = ast.Variables.Select(v => Repeat('━', v.Length + 2)).ToList();
+        var resultLine = Repeat('━', label.Length + 4);
 
         sb.Append("┏━");
-        variableLine.ForEach(s => sb.Append(s));
-        sb.AppendLine("━┳━━━━━━━━┓");
+        sb.AppendJoin(null, variableLine);
+        sb.AppendLine($"━┳{resultLine}┓");
 
         sb.Append("┃ ");
         ast.Variables.ForEach(v => sb.Append($" {v} "));
-        sb.AppendLine(" ┃ Result ┃");
+        sb.AppendLine($" ┃  {label}  ┃");
 
         sb.Append("┣━");
-        variableLine.ForEach(s => sb.Append(s));
-        sb.AppendLine("━╋━━━━━━━━┫");
+        sb.AppendJoin(null, variableLine);
+        sb.AppendLine($"━╋{resultLine}┫");
 
         foreach (bool[] row in table)
         {
@@ -57,12 +45,14 @@ public static string FormatTruthTable(Ast ast, List<bool[]> table)
                 sb.Append($"{pad1}{(row[i] ? '1' : '0')}{pad2} ");
             }
 
-            sb.AppendLine($" ┃   {(row[^1] ? '1' : '0')}    ┃");
+            string pad3 = Repeat(' ', (int)Math.Ceiling(label.Length / 2.0f));
+            string pad4 = Repeat(' ', (int)Math.Floor(label.Length / 2.0f));
+            sb.AppendLine($" ┃ {pad3}{(row[^1] ? '1' : '0')}{pad4}  ┃");
         }
 
         sb.Append("┗━");
-        variableLine.ForEach(s => sb.Append(s));
-        sb.AppendLine("━┻━━━━━━━━┛");
+        sb.AppendJoin(null, variableLine);
+        sb.AppendLine($"━┻{resultLine}┛");
 
         return sb.ToString();
     }

v2/BooleanExpressionParser/Program.cs

@@ -17,16 +17,12 @@ static void Main(params string[] args)
 
             var parser = new Parser();
             var prefixTokens = parser.ParseTokens(infixTokens);
-
-            Console.WriteLine($"Infix: {Formatter.FormatInfixTokens(infixTokens)}");
-            Console.WriteLine($"Prefix: {Formatter.FormatPrefixTokens(prefixTokens)}");
-
             var ast = parser.GrowAst(prefixTokens);
 
             var evaluator = new Evaluator(ast);
             var table = evaluator.EvaluateAll();
 
-            var tableString = Formatter.FormatTruthTable(ast, table);
+            var tableString = Formatter.FormatTruthTable(ast, table, label: Formatter.FormatTokens(infixTokens));
             Console.WriteLine(tableString);
         }
     }