| Safe Haskell | Safe |
|---|---|
| Language | Haskell2010 |
Data.Int
Contents
Signed integer types
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
fromIntegral. Coercing word types (see Data.Word) to and
from integer types preserves representation, not sign.
The rules that hold for 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 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.
data Int :: *
data Int8 :: *
8-bit signed integer type
data Int16 :: *
16-bit signed integer type
data Int32 :: *
32-bit signed integer type