Implement function and variable codegen

common/addons/structure-terrascript-loader/src/test/java/codegen/CodeGenTest.java

@@ -0,0 +1,77 @@
+package codegen;
+
+import com.dfsek.terra.addons.terrascript.ErrorHandler;
+import com.dfsek.terra.addons.terrascript.ast.Stmt.Block;
+import com.dfsek.terra.addons.terrascript.codegen.TerraScript;
+import com.dfsek.terra.addons.terrascript.codegen.asm.TerraScriptClassGenerator;
+import com.dfsek.terra.addons.terrascript.lexer.Lexer;
+import com.dfsek.terra.addons.terrascript.parser.Parser;
+import com.dfsek.terra.addons.terrascript.semanticanalysis.SemanticAnalyzer;
+
+import org.junit.jupiter.api.Test;
+
+public class CodeGenTest {
+    
+    @Test
+    public void test() {
+        testValid("""
+                  fun retNum(): num {
+                      return 3 + 3;
+                  }
+                  
+                  fun retBool(): bool {
+                      return true;
+                  }
+                  
+                  fun concatThree(a: str, b: str, c: str): str {
+                      return a + b + c;
+                  }
+                  
+                  fun retStr(): str {
+                      fun concatTwo(a: str, b: str): str {
+                          return a + b;
+                      }
+                      str hello = "Hell";
+                      hello = concatTwo(hello, "o");
+                      str world = "world!";
+                      return concatThree(hello, " ", world);
+                  }
+                  
+                  fun takesArgs(a: str, b: num, c: bool): str {
+                      return a;
+                  }
+                  
+                  fun doStuff(a: str, b: str, c: bool) {
+                      print("Doing stuff");
+                      if (c) {
+                          print(concatThree(a, " ", b));
+                      } else {
+                          print("c is false");
+                      }
+                  }
+                  
+                  num a = 1;
+                  num b = 2;
+                  str e = "test";
+                  
+                  retNum();
+                  bool bln = true;
+              
+                  print(takesArgs("test", 3, true));
+                  print(retStr());
+                  
+                  doStuff("Ay0o", "world", true);
+                  """);
+    }
+    
+    private void testValid(String validSource) {
+        try {
+            Block script = Parser.parse(new Lexer(validSource).analyze());
+            SemanticAnalyzer.analyze(script, new ErrorHandler());
+            TerraScript ts = new TerraScriptClassGenerator("./build/codegentest").generate(script);
+            ts.execute();
+        } catch(Exception e) {
+            throw new RuntimeException(e);
+        }
+    }
+}