[tlox] Implement TruffleLanguage class

jlox/tlox/src/main/java/xyz/ctsk/lox/LoxLanguage.java

@@ -0,0 +1,26 @@
+package xyz.ctsk.lox;
+
+import com.oracle.truffle.api.CallTarget;
+import com.oracle.truffle.api.TruffleLanguage;
+import xyz.ctsk.lox.nodes.LoxExpressionNode;
+import xyz.ctsk.lox.nodes.LoxNode;
+import xyz.ctsk.lox.nodes.LoxRootNode;
+import xyz.ctsk.lox.parser.LoxParser;
+
+@TruffleLanguage.Registration(id = LoxLanguage.ID, name = LoxLanguage.NAME)
+public class LoxLanguage extends TruffleLanguage<Void> {
+    public static final String ID = "lox";
+    public static final String NAME = "Lox";
+
+    @Override
+    protected CallTarget parse(ParsingRequest request) throws Exception {
+        LoxNode node = LoxParser.parseLox(request.getSource().getReader());
+        var rootNode = new LoxRootNode((LoxExpressionNode) node);
+        return rootNode.getCallTarget();
+    }
+
+    @Override
+    protected Void createContext(Env env) {
+        return null;
+    }
+}

jlox/tlox/src/main/java/xyz/ctsk/lox/Main.java

@@ -1,5 +1,6 @@
 package xyz.ctsk.lox;
 
+import xyz.ctsk.lox.nodes.LoxExpressionNode;
 import xyz.ctsk.lox.nodes.LoxRootNode;
 import xyz.ctsk.lox.parser.LoxParser;
 
@@ -22,13 +23,11 @@ public class Main {
     }
 
     public static void run(String program) {
-        var parsed = LoxParser.parseLox(program);
-
-        if (parsed instanceof LoxParser.ExpressionContext expr) {
-            var root = new LoxRootNode(expr.result);
-            var callTarget = root.getCallTarget();
-            System.out.println(callTarget.call());
-        }
+        var parsed = (LoxExpressionNode) LoxParser.parseLox(program);
+        if (parsed == null) return;
+        var root = new LoxRootNode(parsed);
+        var callTarget = root.getCallTarget();
+        System.out.println(callTarget.call());
     }
 
     public static void main(String[] args) throws IOException {

jlox/tlox/src/main/resources/xyz/ctsk/lox/parser/Lox.g4

@@ -5,21 +5,31 @@ grammar Lox;
 
 import com.oracle.truffle.api.source.Source;
 
+import xyz.ctsk.lox.nodes.LoxNode;
 import xyz.ctsk.lox.nodes.LoxExpressionNode;
 import xyz.ctsk.lox.parser.*;
 
+import java.io.IOException;
+import java.io.Reader;
+
 }
 
 @parser::members {
     private LoxNodeFactory factory;
 
-    public static Object parseLox(String source) {
-        LoxLexer lexer = new LoxLexer(CharStreams.fromString(source));
+    public static LoxNode parseLox(String source) {
+        return parseLox(CharStreams.fromString(source));
+    }
+
+    public static LoxNode parseLox(Reader reader) throws IOException {
+        return parseLox(CharStreams.fromReader(reader));
+    }
+
+    public static LoxNode parseLox(CharStream inputStream) {
+        LoxLexer lexer = new LoxLexer(inputStream);
         LoxParser parser = new LoxParser(new CommonTokenStream(lexer));
-
         parser.factory = new LoxNodeFactory();
-
-        return parser.expression();
+        return parser.file().expression().result;
     }
 }