HSL Type constraints on variables and functions

[GuusLieben]

Related problem

No response

Requested feature

Typed variables

Expansion of variable declarations, to allow adding a type constraint to variables. Possible solutions (in order of preference):

• var name: String = "Foo"
• String name = "Foo"
• var(String) name = "Foo"

Typed functions

Similar to typed variables, but focused on function declarations. Possible solutions (in order of preference):

• fun fooBar(): String { ... }
• fun String fooBar() { ... }
• String fooBar() { ... }
  This should match the decision made for typed variables, so likely the first solution is most appropriate.