1 files changed, 92 insertions, 0 deletions
diff --git a/src/pkg/exp/eval/main.go b/src/pkg/exp/eval/main.go
new file mode 100644
index 000000000..2a6d94845
--- /dev/null
+++ b/src/pkg/exp/eval/main.go
@@ -0,0 +1,92 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+import (
+	"./_obj/eval";
+	"bufio";
+	"flag";
+	"go/parser";
+	"go/scanner";
+	"io";
+	"os";
+)
+
+var filename = flag.String("f", "", "file to run");
+
+func main() {
+	flag.Parse();
+	w := eval.NewWorld();
+	if *filename != "" {
+		data, err := io.ReadFile(*filename);
+		if err != nil {
+			println(err.String());
+			os.Exit(1);
+		}
+		file, err := parser.ParseFile(*filename, data, 0);
+		if err != nil {
+			println(err.String());
+			os.Exit(1);
+		}
+		code, err := w.CompileDeclList(file.Decls);
+		if err != nil {
+			if list, ok := err.(scanner.ErrorList); ok {
+				for _, e := range list {
+					println(e.String());
+				}
+			} else {
+				println(err.String());
+			}
+			os.Exit(1);
+		}
+		_, err := code.Run();
+		if err != nil {
+			println(err.String());
+			os.Exit(1);
+		}
+		code, err = w.Compile("init()");
+		if code != nil {
+			_, err := code.Run();
+			if err != nil {
+				println(err.String());
+				os.Exit(1);
+			}
+		}
+		code, err = w.Compile("main()");
+		if err != nil {
+			println(err.String());
+			os.Exit(1);
+		}
+		_, err = code.Run();
+		if err != nil {
+			println(err.String());
+			os.Exit(1);
+		}
+		os.Exit(0);
+	}
+
+	r := bufio.NewReader(os.Stdin);
+	for {
+		print("; ");
+		line, err := r.ReadString('\n');
+		if err != nil {
+			break;
+		}
+		code, err := w.Compile(line);
+		if err != nil {
+			println(err.String());
+			continue;
+		}
+		v, err := code.Run();
+		if err != nil {
+			println(err.String());
+			continue;
+		}
+		if v != nil {
+			println(v.String());
+		}
+	}
+}
+