Add int FSA

Author: justcoding121

src/Rain.Compiler/Models/Tokenization/Constants/Fsa/IntFsaStateNames.cs

@@ -0,0 +1,14 @@
+namespace Rain.Compiler.Models.Tokenization.Constants.Fsa;
+
+
+internal class IntFsaStateNames
+{
+    internal const string Zero = nameof(Zero);
+    internal const string Digit = nameof(Digit);
+    internal const string HexPrefix = nameof(HexPrefix);
+    internal const string Hex = nameof(Hex);
+    internal const string Octat = nameof(Octat);
+    internal const string Long = nameof(Long);
+    internal const string Unsigned = nameof(Unsigned);
+    internal const string UnsignedLong = nameof(UnsignedLong);
+}

src/Rain.Compiler/Tokenization/DfaGraphs/IntFsa.cs

@@ -0,0 +1,55 @@
+using Rain.Compiler.Models.Tokenization.Constants.Fsa;
+using Rain.Compiler.Models.Tokenization;
+using Rain.Compiler.Tokenization.DfaGraphs.Interface;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Rain.Compiler.Tokenization.DfaGraphs;
+
+internal class IntFsa : Fsa, IFsa
+{
+    private readonly FsaGraphNode _zero;
+    private readonly FsaGraphNode _digit;
+    private readonly FsaGraphNode _hexPrefix;
+    private readonly FsaGraphNode _hex;
+    private readonly FsaGraphNode _octat;
+    private readonly FsaGraphNode _long;
+    private readonly FsaGraphNode _unsigned;
+    private readonly FsaGraphNode _unsignedLong;
+
+    internal IntFsa() : base()
+    {
+        _zero = new FsaGraphNode(IntFsaStateNames.Zero);
+        _digit = new FsaGraphNode(IntFsaStateNames.Digit);
+        _hexPrefix = new FsaGraphNode(IntFsaStateNames.HexPrefix);
+        _hex = new FsaGraphNode(IntFsaStateNames.Hex);
+        _octat = new FsaGraphNode(IntFsaStateNames.Octat);
+        _long = new FsaGraphNode(IntFsaStateNames.Long);
+        _unsigned = new FsaGraphNode(IntFsaStateNames.Unsigned);
+        _unsignedLong = new FsaGraphNode(IntFsaStateNames.UnsignedLong);
+
+        AddVertex(_start);
+
+        AddEdge(_start, _zero, new("0"));
+
+        AddEdge(_zero, _long, new("[Ll]"));
+        AddEdge(_long, _unsignedLong, new("[Uu]"));
+
+        AddEdge(_zero, _unsigned, new("[Uu]"));
+        AddEdge(_unsigned, _unsignedLong, new("[Ll]"));
+
+        AddEdge(_zero, _hexPrefix, new("[Xx]"));
+        AddEdge(_hexPrefix, _hex, new("[a-fA-F0-9]"));
+        AddEdge(_hex, _hex, new("[a-fA-F0-9]"));
+        AddEdge(_hex, _long, new("[Ll]"));
+        AddEdge(_hex, _unsigned, new("[Uu]"));
+
+        AddEdge(_zero, _octat, new("[0-7]"));
+        AddEdge(_zero, _unsigned, new("[Uu]"));
+
+        AddEdge(_start, _digit, new("[1-9]"));
+    }
+}