mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-23 03:32:09 +03:00
36 lines
1.2 KiB
Idris
36 lines
1.2 KiB
Idris
-- Additional FFI help for more interesting C types
|
|
-- Some assumptions are made about the existence of this module in
|
|
-- Compiler.CompileExpr
|
|
|
|
module System.FFI
|
|
|
|
export
|
|
data Struct : String -> -- C struct name
|
|
List (String, Type) -> -- field names and types
|
|
Type where
|
|
|
|
public export
|
|
data FieldType : String -> Type -> List (String, Type) -> Type where
|
|
First : FieldType n t ((n, t) :: ts)
|
|
Later : FieldType n t ts -> FieldType n t (f :: ts)
|
|
|
|
%extern
|
|
prim__getField : {s : _} -> forall fs, ty .
|
|
Struct s fs -> (n : String) ->
|
|
FieldType n ty fs -> ty
|
|
%extern
|
|
prim__setField : {s : _} -> forall fs, ty .
|
|
Struct s fs -> (n : String) ->
|
|
FieldType n ty fs -> ty -> PrimIO ()
|
|
|
|
public export %inline
|
|
getField : {s : _} -> Struct s fs -> (n : String) ->
|
|
{auto fieldok : FieldType n ty fs} -> ty
|
|
getField s n = prim__getField s n fieldok
|
|
|
|
public export %inline
|
|
setField : {s : _} -> Struct s fs -> (n : String) ->
|
|
{auto fieldok : FieldType n ty fs} -> ty -> IO ()
|
|
setField s n val = primIO (prim__setField s n fieldok val)
|
|
|