feat: 将LR分析表生成到代码中 (#27)

Reviewed-on: PostGuard/Canon#27

Canon.Generator/GrammarGenerator/GenerateCommand.cs

@@ -0,0 +1,29 @@
+using System.Text;
+using Canon.Core.Abstractions;
+using Canon.Core.Enums;
+using Canon.Core.GrammarParser;
+
+namespace Canon.Generator.GrammarGenerator;
+
+public class GenerateCommand
+{
+    private readonly GrammarBuilder _builder = new()
+    {
+        Generators = PascalGrammar.Grammar, Begin = new NonTerminator(NonTerminatorType.StartNonTerminator)
+    };
+
+    private readonly GeneratedGrammarParser _parser;
+
+    public GenerateCommand()
+    {
+        Grammar grammar = _builder.Build();
+        _parser = grammar.ToGeneratedGrammarParser();
+    }
+
+    public async Task GenerateCode(Stream output, string namespaceValue)
+    {
+        string code = _parser.GenerateCode(namespaceValue);
+        byte[] bytes = Encoding.UTF8.GetBytes(code);
+        await output.WriteAsync(bytes);
+    }
+}