Using! in Haskell style

Question

Possible duplicate:
What does the exclamation mark mean in the Haskell declaration?

In Alex, the generated template code includes

data AlexPosn = AlexPn !Int  -- absolute character offset
                       !Int  -- line number
                       !Int  -- column number

What is he doing! before Int indicates?

+2

bjwbell Apr 13 10 at 19:24

1 answer

Seiti · Answer 1 · 2010-04-13T19:31:18+0000

This is a strict flag as it is lazy.