| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
Language.C.Inline.Unsafe
Description
unsafe variants of the Language.C.Inline quasi-quoters, to call the C code
unsafely in the sense of
https://www.haskell.org/onlinereport/haskell2010/haskellch8.html#x15-1590008.4.3.
In GHC, unsafe foreign calls are faster than safe foreign calls, but the user
must guarantee the control flow will never enter Haskell code (via a callback
or otherwise) before the call is done.
This module is intended to be imported qualified:
import qualified Language.C.Inline.Unsafe as CU
Synopsis
- exp :: QuasiQuoter
- pure :: QuasiQuoter
- block :: QuasiQuoter
Documentation
exp :: QuasiQuoter Source #
C expressions.
pure :: QuasiQuoter Source #
Variant of exp, for use with expressions known to have no side effects.
BEWARE: Use this function with caution, only when you know what you are
doing. If an expression does in fact have side-effects, then indiscriminate
use of pure may endanger referential transparency, and in principle even
type safety. Also note that the function may run more than once and that it
may run in parallel with itself, given that
unsafeDupablePerformIO is used to call the provided C
code to ensure good performance using the threaded
runtime. Please refer to the
documentation for unsafeDupablePerformIO for more
details.
block :: QuasiQuoter Source #
C code blocks (i.e. statements).