runtime: StringCat

cl/_testrt/concat/in.go

@@ -4,6 +4,14 @@ import (
 	"github.com/goplus/llgo/internal/runtime/c"
 )
 
-func main() {
-	c.Fprintf(c.Stderr, c.Str("Hello %d\n"), 100)
+func concat(args ...string) (ret string) {
+	for _, v := range args {
+		ret += v
+	}
+	return
+}
+
+func main() {
+	result := concat("Hello", " ", "World")
+	c.Fprintf(c.Stderr, c.Str("Hello %s\n"), c.AllocaCStr(result))
 }