E4200

E4200#

Compiler diagnostic name: struct_constr_incorrect_return_type.

A struct constructor must return the struct type itself. If the constructor signature returns another type, the declaration cannot be used as that struct's constructor.

Erroneous example#

///|
priv struct Point {
  x : Int

  fn new(Int) -> String
}

Suggestion#

Make the constructor return the struct type and implement the matching Type::new method.

///|
priv struct Point {
  x : Int

  fn new(Int) -> Point
}

///|
fn Point::new(x : Int) -> Point {
  { x, }
}

///|
test {
  let point = Point(1)
  inspect(point.x, content="1")
}
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