result.then

Author: lpil

CHANGELOG.md

@@ -13,6 +13,8 @@
   up picking the same element twice from a given list.
 - Improved formatting of JavaScript errors in `string.inspect`.
 - JavaScript circular references can now be printed by `string.inspect`.
+- The alias `result.then` was deprecated in favour of using `result.try`
+  directly.
 
 ## v0.60.0 - 2025-05-13
 

src/gleam/result.gleam

@@ -165,8 +165,7 @@ pub fn try(
   }
 }
 
-/// An alias for `try`. See the documentation for that function for more information.
-///
+@deprecated("This function is an alias of result.try, use that instead")
 pub fn then(
   result: Result(a, e),
   apply fun: fn(a) -> Result(b, e),

test/gleam/result_test.gleam

@@ -48,16 +48,6 @@ pub fn try_test() {
   assert result.try(Ok(1), fn(_) { Error(1) }) == Error(1)
 }
 
-pub fn then_test() {
-  assert result.then(Error(1), fn(x) { Ok(x + 1) }) == Error(1)
-
-  assert result.then(Ok(1), fn(x) { Ok(x + 1) }) == Ok(2)
-
-  assert result.then(Ok(1), fn(_) { Ok("type change") }) == Ok("type change")
-
-  assert result.then(Ok(1), fn(_) { Error(1) }) == Error(1)
-}
-
 pub fn unwrap_test() {
   assert result.unwrap(Ok(1), 50) == 1