Working example

src/external/std.rs

@@ -0,0 +1,19 @@
+use std::collections::HashMap;
+
+use crate::project::{map_loader, Loader};
+
+use super::bool::bool;
+use super::cpsio::cpsio;
+use super::conv::conv;
+use super::str::str;
+use super::num::num;
+
+pub fn std() -> impl Loader {
+  map_loader(HashMap::from([
+    ("cpsio", cpsio().boxed()),
+    ("conv", conv().boxed()),
+    ("bool", bool().boxed()),
+    ("str", str().boxed()),
+    ("num", num().boxed()),
+  ]))
+}