This is actually covered by another part of the spec (A.2.1.1)
module-function-or-value-defn :
attributesopt let function-defn attributesopt let value-defn
Since you are defining something in a module directly, it doesn't need the in
Вопрос
I am trying to write F# parser. According to the specification the let expression looks like:
let value-defn in expr
I am using Try F# for testing. I tried following code which is parsed without error.
#light "off"
let a = 1
Yet according to the manual, should always contain in keyword. Why is it valid F# code?
Решение
This is actually covered by another part of the spec (A.2.1.1)
module-function-or-value-defn :
attributesopt let function-defn attributesopt let value-defn
Since you are defining something in a module directly, it doesn't need the in