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Diffstat (limited to 'docs/users_guide/javascript.rst')
| -rw-r--r-- | docs/users_guide/javascript.rst | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/docs/users_guide/javascript.rst b/docs/users_guide/javascript.rst index f33c146f87..3926802d3a 100644 --- a/docs/users_guide/javascript.rst +++ b/docs/users_guide/javascript.rst @@ -1,4 +1,4 @@ -.. _ffi-javascript +.. _ffi-javascript: FFI and the JavaScript Backend ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ @@ -23,7 +23,7 @@ look like: js_add :: Int -> Int -> Int JSVal -^^^^^ +~~~~~ The JavaScript backend has a concept of an untyped 'plain' JavaScript value, under the guise of the type ``JSVal``. Values having this type @@ -47,7 +47,7 @@ It also contains functions for working with objects: * ``getProp :: JSVal -> String -> JSVal`` - object field access JavaScript FFI Types -^^^^^^^^^^^^^^^^^^^^ +~~~~~~~~~~~~~~~~~~~~ Some types are able to be used directly in the type signatures of foreign exports, without conversion to a ``JSVal``. We saw in the first example @@ -75,7 +75,7 @@ for the Haskell `Bool` type: type_error :: Bool -> Bool JavaScript Callbacks -^^^^^^^^^^^^^^^^^^^^ +~~~~~~~~~~~~~~~~~~~~ The JavaScript execution model is based around callback functions, and GHC's JavaScript backend implements these as a type in order to support @@ -146,7 +146,7 @@ passed as an ``Int`` to a ``Callback`` that accepts a ``JSVal``: releaseCallback add3 Callbacks as Foreign Exports -^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +~~~~~~~~~~~~~~~~~~~~~~~~~~~~ JavaScript callbacks allow for a sort of FFI exports via FFI imports. To do this, a global JavaScript variable is set, and that global variable can then |