mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-29 22:51:51 +03:00
64 lines
1.9 KiB
ReStructuredText
64 lines
1.9 KiB
ReStructuredText
.. _sect-execs:
|
|
|
|
************************
|
|
Compiling to Executables
|
|
************************
|
|
|
|
.. note::
|
|
|
|
The documentation for Idris has been published under the Creative
|
|
Commons CC0 License. As such to the extent possible under law, *The
|
|
Idris Community* has waived all copyright and related or neighboring
|
|
rights to Documentation for Idris.
|
|
|
|
More information concerning the CC0 can be found online at: http://creativecommons.org/publicdomain/zero/1.0/
|
|
|
|
Idris 2 (the language) is designed to be independent of any specific code
|
|
generator. Still, since the point of writing a program is to be able to run it,
|
|
it's important to know how to do so! By default, Idris compiles to executables
|
|
via `Chez Scheme <https://www.scheme.com/>`_.
|
|
|
|
You can compile to an executable as follows, at the REPL:
|
|
|
|
::
|
|
|
|
Main> :c execname expr
|
|
|
|
...where ``execname`` is the name of the executable file to generate, and
|
|
``expr`` is the Idris expression which will be executed. ``expr`` must have
|
|
type ``IO ()``. This will result in an executable file ``execname``, in a
|
|
directory ``build/exec``, relative to the current working directory.
|
|
|
|
You can also execute expressions directly:
|
|
|
|
::
|
|
|
|
Main> :exec expr
|
|
|
|
Again, ``expr`` must have type ``IO ()``.
|
|
|
|
Finally, you can compile to an executable from the command line by adding
|
|
the ``-o <output file>`` option:
|
|
|
|
::
|
|
|
|
$ idris2 hello.idr -o hello
|
|
|
|
This will compile the expression ``Main.main``, generating an executable
|
|
``hello`` (with an extension depending on the code generator) in the
|
|
``build/exec`` directory.
|
|
|
|
There are three code generators provided in Idris 2, and (later) there will be
|
|
a system for plugging in new code generators for a variety of targets. The
|
|
default is to compile via Chez Scheme, with an alternative via Racket or Gambit.
|
|
You can set the code generator at the REPL with the `:set codegen` command,
|
|
or via the `IDRIS2_CG` environment variable.
|
|
|
|
.. toctree::
|
|
:maxdepth: 1
|
|
|
|
chez
|
|
racket
|
|
gambit
|
|
custom
|