bagend.git

diff --git a/bagend.go b/bagend.go
new file mode 100644
index 0000000000000000000000000000000000000000..aa8dab1cd80650f176654131f6b824f727ab83a0
--- /dev/null
+++ b/bagend.go
@@ -0,0 +1,33 @@
+package bagend
+
+import (
+	"fmt"
+	"runtime"
+)
+
+func TODO(msg string) interface{} {
+	_, file, no, ok := runtime.Caller(1)
+	var panicmsg string
+	if ok {
+		panicmsg = fmt.Sprintf("TODO %s (%s#%d)", msg, file, no)
+	} else {
+		panicmsg = fmt.Sprintf("TODO %s", msg)
+	}
+	panic(panicmsg)
+}
+
+func Assert(cond bool, msg string) {
+	if !cond {
+		_, file, no, ok := runtime.Caller(1)
+		var panicmsg string
+		if ok {
+			panicmsg = fmt.Sprintf("assertion in %s#%d failed", file, no)
+		} else {
+			panicmsg = fmt.Sprintf("assertion failed")
+		}
+		if msg != "" {
+			panicmsg = fmt.Sprintf("%s (%s)", panicmsg, msg)
+		}
+		panic(panicmsg)
+	}
+}




diff --git a/bagend_test.go b/bagend_test.go
new file mode 100644
index 0000000000000000000000000000000000000000..031f7e1888a378f14be56ffdac4a521d51cc7dae
--- /dev/null
+++ b/bagend_test.go
@@ -0,0 +1,39 @@
+package bagend
+
+import (
+	"testing"
+)
+
+func TestTodo(t *testing.T) {
+	defer func() {
+		if err := recover(); err == nil {
+			t.Errorf("expected a panic\n")
+		}
+	}()
+
+	TODO("test")
+}
+
+func TestAssertTrue(t *testing.T) {
+	defer func() {
+		if err := recover(); err != nil {
+			t.Errorf("didn’t expect a panic\n")
+		}
+	}()
+
+	Assert(2+2 == 4, "2+2 must be equal 4")
+}
+
+func TestAssertFalse(t *testing.T) {
+	defer func() {
+		if err := recover(); err == nil {
+			t.Errorf("expected a panic\n")
+		}
+	}()
+
+	Assert(2+2 == 5, "2+2 must be equal 4")
+}
+
+func a() string {
+	return TODO("a").(string)
+}




diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000000000000000000000000000000000000..4732a8678e8daf1b9d61f299d35aba92341d082c
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,3 @@
+module apiote.xyz/p/bagend
+
+go 1.18