mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-27 13:43:28 +03:00
74 lines
2.0 KiB
ReStructuredText
74 lines
2.0 KiB
ReStructuredText
**************************
|
|
Chez Scheme Code Generator
|
|
**************************
|
|
|
|
The Chez Scheme code generator is the default, or it can be accessed via a REPL
|
|
command:
|
|
|
|
::
|
|
|
|
Main> :set cg chez
|
|
|
|
By default, therefore, to run Idris programs you will need to install
|
|
`Chez Scheme <https://www.scheme.com/>`_. Chez Scheme is open source, and
|
|
available via most OS package managers.
|
|
|
|
You can compile an expression ``expr`` of type ``IO ()`` to an executable as
|
|
follows, at the REPL:
|
|
|
|
::
|
|
|
|
Main> :c execname expr
|
|
|
|
...where ``execname`` is the name of the executable file. This will generate
|
|
the following:
|
|
|
|
* A shell script ``build/exec/execname`` which invokes the program
|
|
* A subdirectory ``build/exec/execname_app`` which contains all the data necessary
|
|
to run the program. This includes the Chez Scheme source (``execname.ss``),
|
|
the compiled Chez Scheme code (``execname.so``) and any shared libraries needed
|
|
for foreign function definitions.
|
|
|
|
The executable ``execname`` is relocatable to any subdirectory, provided that
|
|
``execname_app`` is also in the same subdirectory.
|
|
|
|
You can also execute an expression directly:
|
|
|
|
::
|
|
|
|
Main> :exec expr
|
|
|
|
Again, ``expr`` must have type ``IO ()``. This will generate a temporary
|
|
executable script ``_tmpchez`` in the ``build/exec`` directory, and execute
|
|
that.
|
|
|
|
Chez Scheme is the default code generator, so if you invoke ``idris2`` with the
|
|
``-o execname`` flag, it will generate an executable script
|
|
``build/exec/execname``, again with support files in ``build/exec/execname_app``.
|
|
|
|
|
|
Chez Directives
|
|
===============
|
|
|
|
* ``--directive extraRuntime=<path>``
|
|
|
|
Embed Scheme source from ``<path>`` directly into generated output. Can be specified more than
|
|
once, in which case all given files will be included in the order specified.
|
|
|
|
.. code-block:: scheme
|
|
|
|
; extensions.scm
|
|
(define (my-mul a b)
|
|
(* a b))
|
|
|
|
|
|
.. code-block:: idris
|
|
|
|
-- Main.idr
|
|
%foreign "scheme:my-mul"
|
|
myMul : Int -> Int -> Int
|
|
|
|
.. code-block::
|
|
|
|
$ idris2 --codegen chez --directive extraRuntime=/path/to/extensions.scm -o main Main.idr
|