Document opaque types

Closes https://github.com/gleam-lang/language-tour/issues/63

1 files changed, 0 insertions, 30 deletions

diff --git a/src/content/chapter5_advanced_features/lesson01_use_sugar/code.gleam b/src/content/chapter5_advanced_features/lesson01_use_sugar/code.gleam
deleted file mode 100644
index 6c5ccaa..0000000
--- a/src/content/chapter5_advanced_features/lesson01_use_sugar/code.gleam
+++ /dev/null
@@ -1,30 +0,0 @@
-import gleam/io
-import gleam/result
-
-pub fn main() {
-  let x = {
-    use username <- result.try(get_username())
-    use password <- result.try(get_password())
-    use greeting <- result.map(log_in(username, password))
-    greeting <> ", " <> username
-  }
-
-  case x {
-    Ok(greeting) -> io.println(greeting)
-    Error(error) -> io.println("ERROR:" <> error)
-  }
-}
-
-// Here are some pretend functions for this example:
-
-fn get_username() {
-  Ok("alice")
-}
-
-fn get_password() {
-  Ok("hunter2")
-}
-
-fn log_in(_username: String, _password: String) {
-  Ok("Welcome")
-}