{-# LANGUAGE CPP, PackageImports #-} #if __GLASGOW_HASKELL__ >= 701 {-# LANGUAGE Safe #-} #endif module Data.Int ( -- * Signed integer types -- $notes Int, Int8, Int16, Int32, Int64, ) where import "base" Data.Int -- SDM: removed after 'Prelude.fromIntegral': -- ..., which is specialized for all the common cases -- so should be fast enough {- $notes This module provides signed integer types of unspecified width ('Int') and fixed widths ('Int8', 'Int16', 'Int32' and 'Int64'). All arithmetic is performed modulo 2^n, where @n@ is the number of bits in the type. For coercing between any two integer types, use 'Prelude.fromIntegral'. Coercing word types (see "Data.Word") to and from integer types preserves representation, not sign. The rules that hold for 'Prelude.Enum' instances over a bounded type such as 'Int' (see the section of the Haskell language report dealing with arithmetic sequences) also hold for the 'Prelude.Enum' instances over the various 'Int' types defined here. Right and left shifts by amounts greater than or equal to the width of the type result in either zero or -1, depending on the sign of the value being shifted. This is contrary to the behaviour in C, which is undefined; a common interpretation is to truncate the shift count to the width of the type, for example @1 \<\< 32 == 1@ in some C implementations. -}