diff options
| author | Josh Meredith <joshmeredith2008@gmail.com> | 2023-03-06 09:18:03 +0000 |
|---|---|---|
| committer | Josh Meredith <joshmeredith2008@gmail.com> | 2023-04-11 10:27:20 +0000 |
| commit | ffb4fc49cc57c411dcd2d83f8b5e6c3fb48923b7 (patch) | |
| tree | 5951ce0b43bfc9870c026bd16099b9539547ec99 /testsuite/tests/javascript/js-callback02.hs | |
| parent | 3ba77b369a170ba68f4eb5c8f3ae13e03dcbb28d (diff) | |
| download | haskell-wip/js-exports.tar.gz | |
Base/JS: GHC.JS.Foreign.Callback module (issue 23126)wip/js-exports
* Add the Callback module for "exporting" Haskell functions
to be available to plain JavaScript code
* Fix some primitives defined in GHC.JS.Prim
* Add a JavaScript section to the user guide with instructions
on how to use the JavaScript FFI, building up to using Callbacks
to interact with the browser
* Add tests for the JavaScript FFI and Callbacks
Diffstat (limited to 'testsuite/tests/javascript/js-callback02.hs')
| -rw-r--r-- | testsuite/tests/javascript/js-callback02.hs | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/testsuite/tests/javascript/js-callback02.hs b/testsuite/tests/javascript/js-callback02.hs new file mode 100644 index 0000000000..3fc8896f54 --- /dev/null +++ b/testsuite/tests/javascript/js-callback02.hs @@ -0,0 +1,42 @@ +import GHC.JS.Prim +import GHC.JS.Foreign.Callback + +foreign import javascript "(() => { return 1; })" + plus_one0 :: IO JSVal + +foreign import javascript "((x) => { return x + 1; })" + plus_one1 :: JSVal -> IO JSVal + +foreign import javascript "((x,y) => { return x + y + 1; })" + plus_one2 :: JSVal -> JSVal -> IO JSVal + +foreign import javascript "((x,y,z) => { return x + y + z + 1; })" + plus_one3 :: JSVal -> JSVal -> JSVal -> IO JSVal + +foreign import javascript "((f) => { return f(); })" + js_apply0 :: Callback (IO JSVal) -> IO JSVal + +foreign import javascript "((f,x) => { return f(x); })" + js_apply1 :: Callback (JSVal -> IO JSVal) -> JSVal -> IO JSVal + +foreign import javascript "((f,x,y) => { return f(x,y); })" + js_apply2 :: Callback (JSVal -> JSVal -> IO JSVal) -> JSVal -> JSVal -> IO JSVal + +foreign import javascript "((f,x,y,z) => { return f(x,y,z); })" + js_apply3 :: Callback (JSVal -> JSVal -> JSVal -> IO JSVal) -> JSVal -> JSVal -> JSVal -> IO JSVal + +logJSInt :: JSVal -> IO () +logJSInt = print . fromJSInt + +main :: IO () +main = do + plusOne0 <- syncCallback' plus_one0 + plusOne1 <- syncCallback1' plus_one1 + plusOne2 <- syncCallback2' plus_one2 + plusOne3 <- syncCallback3' plus_one3 + + logJSInt =<< js_apply0 plusOne0 + logJSInt =<< js_apply1 plusOne1 (toJSInt 2) + logJSInt =<< js_apply2 plusOne2 (toJSInt 2) (toJSInt 3) + logJSInt =<< js_apply3 plusOne3 (toJSInt 2) (toJSInt 3) (toJSInt 4) + |