mirror of
https://github.com/frasertweedale/hs-fresnel.git
synced 2024-10-05 14:17:22 +03:00
initial commit
This commit is contained in:
commit
19fd5dd5a3
7
.gitignore
vendored
Normal file
7
.gitignore
vendored
Normal file
@ -0,0 +1,7 @@
|
||||
dist
|
||||
.cabal-sandbox
|
||||
cabal.sandbox.config
|
||||
.stack-work
|
||||
|
||||
*.o
|
||||
*.hi
|
661
agpl-3.0.txt
Normal file
661
agpl-3.0.txt
Normal file
@ -0,0 +1,661 @@
|
||||
GNU AFFERO GENERAL PUBLIC LICENSE
|
||||
Version 3, 19 November 2007
|
||||
|
||||
Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
Preamble
|
||||
|
||||
The GNU Affero General Public License is a free, copyleft license for
|
||||
software and other kinds of works, specifically designed to ensure
|
||||
cooperation with the community in the case of network server software.
|
||||
|
||||
The licenses for most software and other practical works are designed
|
||||
to take away your freedom to share and change the works. By contrast,
|
||||
our General Public Licenses are intended to guarantee your freedom to
|
||||
share and change all versions of a program--to make sure it remains free
|
||||
software for all its users.
|
||||
|
||||
When we speak of free software, we are referring to freedom, not
|
||||
price. Our General Public Licenses are designed to make sure that you
|
||||
have the freedom to distribute copies of free software (and charge for
|
||||
them if you wish), that you receive source code or can get it if you
|
||||
want it, that you can change the software or use pieces of it in new
|
||||
free programs, and that you know you can do these things.
|
||||
|
||||
Developers that use our General Public Licenses protect your rights
|
||||
with two steps: (1) assert copyright on the software, and (2) offer
|
||||
you this License which gives you legal permission to copy, distribute
|
||||
and/or modify the software.
|
||||
|
||||
A secondary benefit of defending all users' freedom is that
|
||||
improvements made in alternate versions of the program, if they
|
||||
receive widespread use, become available for other developers to
|
||||
incorporate. Many developers of free software are heartened and
|
||||
encouraged by the resulting cooperation. However, in the case of
|
||||
software used on network servers, this result may fail to come about.
|
||||
The GNU General Public License permits making a modified version and
|
||||
letting the public access it on a server without ever releasing its
|
||||
source code to the public.
|
||||
|
||||
The GNU Affero General Public License is designed specifically to
|
||||
ensure that, in such cases, the modified source code becomes available
|
||||
to the community. It requires the operator of a network server to
|
||||
provide the source code of the modified version running there to the
|
||||
users of that server. Therefore, public use of a modified version, on
|
||||
a publicly accessible server, gives the public access to the source
|
||||
code of the modified version.
|
||||
|
||||
An older license, called the Affero General Public License and
|
||||
published by Affero, was designed to accomplish similar goals. This is
|
||||
a different license, not a version of the Affero GPL, but Affero has
|
||||
released a new version of the Affero GPL which permits relicensing under
|
||||
this license.
|
||||
|
||||
The precise terms and conditions for copying, distribution and
|
||||
modification follow.
|
||||
|
||||
TERMS AND CONDITIONS
|
||||
|
||||
0. Definitions.
|
||||
|
||||
"This License" refers to version 3 of the GNU Affero General Public License.
|
||||
|
||||
"Copyright" also means copyright-like laws that apply to other kinds of
|
||||
works, such as semiconductor masks.
|
||||
|
||||
"The Program" refers to any copyrightable work licensed under this
|
||||
License. Each licensee is addressed as "you". "Licensees" and
|
||||
"recipients" may be individuals or organizations.
|
||||
|
||||
To "modify" a work means to copy from or adapt all or part of the work
|
||||
in a fashion requiring copyright permission, other than the making of an
|
||||
exact copy. The resulting work is called a "modified version" of the
|
||||
earlier work or a work "based on" the earlier work.
|
||||
|
||||
A "covered work" means either the unmodified Program or a work based
|
||||
on the Program.
|
||||
|
||||
To "propagate" a work means to do anything with it that, without
|
||||
permission, would make you directly or secondarily liable for
|
||||
infringement under applicable copyright law, except executing it on a
|
||||
computer or modifying a private copy. Propagation includes copying,
|
||||
distribution (with or without modification), making available to the
|
||||
public, and in some countries other activities as well.
|
||||
|
||||
To "convey" a work means any kind of propagation that enables other
|
||||
parties to make or receive copies. Mere interaction with a user through
|
||||
a computer network, with no transfer of a copy, is not conveying.
|
||||
|
||||
An interactive user interface displays "Appropriate Legal Notices"
|
||||
to the extent that it includes a convenient and prominently visible
|
||||
feature that (1) displays an appropriate copyright notice, and (2)
|
||||
tells the user that there is no warranty for the work (except to the
|
||||
extent that warranties are provided), that licensees may convey the
|
||||
work under this License, and how to view a copy of this License. If
|
||||
the interface presents a list of user commands or options, such as a
|
||||
menu, a prominent item in the list meets this criterion.
|
||||
|
||||
1. Source Code.
|
||||
|
||||
The "source code" for a work means the preferred form of the work
|
||||
for making modifications to it. "Object code" means any non-source
|
||||
form of a work.
|
||||
|
||||
A "Standard Interface" means an interface that either is an official
|
||||
standard defined by a recognized standards body, or, in the case of
|
||||
interfaces specified for a particular programming language, one that
|
||||
is widely used among developers working in that language.
|
||||
|
||||
The "System Libraries" of an executable work include anything, other
|
||||
than the work as a whole, that (a) is included in the normal form of
|
||||
packaging a Major Component, but which is not part of that Major
|
||||
Component, and (b) serves only to enable use of the work with that
|
||||
Major Component, or to implement a Standard Interface for which an
|
||||
implementation is available to the public in source code form. A
|
||||
"Major Component", in this context, means a major essential component
|
||||
(kernel, window system, and so on) of the specific operating system
|
||||
(if any) on which the executable work runs, or a compiler used to
|
||||
produce the work, or an object code interpreter used to run it.
|
||||
|
||||
The "Corresponding Source" for a work in object code form means all
|
||||
the source code needed to generate, install, and (for an executable
|
||||
work) run the object code and to modify the work, including scripts to
|
||||
control those activities. However, it does not include the work's
|
||||
System Libraries, or general-purpose tools or generally available free
|
||||
programs which are used unmodified in performing those activities but
|
||||
which are not part of the work. For example, Corresponding Source
|
||||
includes interface definition files associated with source files for
|
||||
the work, and the source code for shared libraries and dynamically
|
||||
linked subprograms that the work is specifically designed to require,
|
||||
such as by intimate data communication or control flow between those
|
||||
subprograms and other parts of the work.
|
||||
|
||||
The Corresponding Source need not include anything that users
|
||||
can regenerate automatically from other parts of the Corresponding
|
||||
Source.
|
||||
|
||||
The Corresponding Source for a work in source code form is that
|
||||
same work.
|
||||
|
||||
2. Basic Permissions.
|
||||
|
||||
All rights granted under this License are granted for the term of
|
||||
copyright on the Program, and are irrevocable provided the stated
|
||||
conditions are met. This License explicitly affirms your unlimited
|
||||
permission to run the unmodified Program. The output from running a
|
||||
covered work is covered by this License only if the output, given its
|
||||
content, constitutes a covered work. This License acknowledges your
|
||||
rights of fair use or other equivalent, as provided by copyright law.
|
||||
|
||||
You may make, run and propagate covered works that you do not
|
||||
convey, without conditions so long as your license otherwise remains
|
||||
in force. You may convey covered works to others for the sole purpose
|
||||
of having them make modifications exclusively for you, or provide you
|
||||
with facilities for running those works, provided that you comply with
|
||||
the terms of this License in conveying all material for which you do
|
||||
not control copyright. Those thus making or running the covered works
|
||||
for you must do so exclusively on your behalf, under your direction
|
||||
and control, on terms that prohibit them from making any copies of
|
||||
your copyrighted material outside their relationship with you.
|
||||
|
||||
Conveying under any other circumstances is permitted solely under
|
||||
the conditions stated below. Sublicensing is not allowed; section 10
|
||||
makes it unnecessary.
|
||||
|
||||
3. Protecting Users' Legal Rights From Anti-Circumvention Law.
|
||||
|
||||
No covered work shall be deemed part of an effective technological
|
||||
measure under any applicable law fulfilling obligations under article
|
||||
11 of the WIPO copyright treaty adopted on 20 December 1996, or
|
||||
similar laws prohibiting or restricting circumvention of such
|
||||
measures.
|
||||
|
||||
When you convey a covered work, you waive any legal power to forbid
|
||||
circumvention of technological measures to the extent such circumvention
|
||||
is effected by exercising rights under this License with respect to
|
||||
the covered work, and you disclaim any intention to limit operation or
|
||||
modification of the work as a means of enforcing, against the work's
|
||||
users, your or third parties' legal rights to forbid circumvention of
|
||||
technological measures.
|
||||
|
||||
4. Conveying Verbatim Copies.
|
||||
|
||||
You may convey verbatim copies of the Program's source code as you
|
||||
receive it, in any medium, provided that you conspicuously and
|
||||
appropriately publish on each copy an appropriate copyright notice;
|
||||
keep intact all notices stating that this License and any
|
||||
non-permissive terms added in accord with section 7 apply to the code;
|
||||
keep intact all notices of the absence of any warranty; and give all
|
||||
recipients a copy of this License along with the Program.
|
||||
|
||||
You may charge any price or no price for each copy that you convey,
|
||||
and you may offer support or warranty protection for a fee.
|
||||
|
||||
5. Conveying Modified Source Versions.
|
||||
|
||||
You may convey a work based on the Program, or the modifications to
|
||||
produce it from the Program, in the form of source code under the
|
||||
terms of section 4, provided that you also meet all of these conditions:
|
||||
|
||||
a) The work must carry prominent notices stating that you modified
|
||||
it, and giving a relevant date.
|
||||
|
||||
b) The work must carry prominent notices stating that it is
|
||||
released under this License and any conditions added under section
|
||||
7. This requirement modifies the requirement in section 4 to
|
||||
"keep intact all notices".
|
||||
|
||||
c) You must license the entire work, as a whole, under this
|
||||
License to anyone who comes into possession of a copy. This
|
||||
License will therefore apply, along with any applicable section 7
|
||||
additional terms, to the whole of the work, and all its parts,
|
||||
regardless of how they are packaged. This License gives no
|
||||
permission to license the work in any other way, but it does not
|
||||
invalidate such permission if you have separately received it.
|
||||
|
||||
d) If the work has interactive user interfaces, each must display
|
||||
Appropriate Legal Notices; however, if the Program has interactive
|
||||
interfaces that do not display Appropriate Legal Notices, your
|
||||
work need not make them do so.
|
||||
|
||||
A compilation of a covered work with other separate and independent
|
||||
works, which are not by their nature extensions of the covered work,
|
||||
and which are not combined with it such as to form a larger program,
|
||||
in or on a volume of a storage or distribution medium, is called an
|
||||
"aggregate" if the compilation and its resulting copyright are not
|
||||
used to limit the access or legal rights of the compilation's users
|
||||
beyond what the individual works permit. Inclusion of a covered work
|
||||
in an aggregate does not cause this License to apply to the other
|
||||
parts of the aggregate.
|
||||
|
||||
6. Conveying Non-Source Forms.
|
||||
|
||||
You may convey a covered work in object code form under the terms
|
||||
of sections 4 and 5, provided that you also convey the
|
||||
machine-readable Corresponding Source under the terms of this License,
|
||||
in one of these ways:
|
||||
|
||||
a) Convey the object code in, or embodied in, a physical product
|
||||
(including a physical distribution medium), accompanied by the
|
||||
Corresponding Source fixed on a durable physical medium
|
||||
customarily used for software interchange.
|
||||
|
||||
b) Convey the object code in, or embodied in, a physical product
|
||||
(including a physical distribution medium), accompanied by a
|
||||
written offer, valid for at least three years and valid for as
|
||||
long as you offer spare parts or customer support for that product
|
||||
model, to give anyone who possesses the object code either (1) a
|
||||
copy of the Corresponding Source for all the software in the
|
||||
product that is covered by this License, on a durable physical
|
||||
medium customarily used for software interchange, for a price no
|
||||
more than your reasonable cost of physically performing this
|
||||
conveying of source, or (2) access to copy the
|
||||
Corresponding Source from a network server at no charge.
|
||||
|
||||
c) Convey individual copies of the object code with a copy of the
|
||||
written offer to provide the Corresponding Source. This
|
||||
alternative is allowed only occasionally and noncommercially, and
|
||||
only if you received the object code with such an offer, in accord
|
||||
with subsection 6b.
|
||||
|
||||
d) Convey the object code by offering access from a designated
|
||||
place (gratis or for a charge), and offer equivalent access to the
|
||||
Corresponding Source in the same way through the same place at no
|
||||
further charge. You need not require recipients to copy the
|
||||
Corresponding Source along with the object code. If the place to
|
||||
copy the object code is a network server, the Corresponding Source
|
||||
may be on a different server (operated by you or a third party)
|
||||
that supports equivalent copying facilities, provided you maintain
|
||||
clear directions next to the object code saying where to find the
|
||||
Corresponding Source. Regardless of what server hosts the
|
||||
Corresponding Source, you remain obligated to ensure that it is
|
||||
available for as long as needed to satisfy these requirements.
|
||||
|
||||
e) Convey the object code using peer-to-peer transmission, provided
|
||||
you inform other peers where the object code and Corresponding
|
||||
Source of the work are being offered to the general public at no
|
||||
charge under subsection 6d.
|
||||
|
||||
A separable portion of the object code, whose source code is excluded
|
||||
from the Corresponding Source as a System Library, need not be
|
||||
included in conveying the object code work.
|
||||
|
||||
A "User Product" is either (1) a "consumer product", which means any
|
||||
tangible personal property which is normally used for personal, family,
|
||||
or household purposes, or (2) anything designed or sold for incorporation
|
||||
into a dwelling. In determining whether a product is a consumer product,
|
||||
doubtful cases shall be resolved in favor of coverage. For a particular
|
||||
product received by a particular user, "normally used" refers to a
|
||||
typical or common use of that class of product, regardless of the status
|
||||
of the particular user or of the way in which the particular user
|
||||
actually uses, or expects or is expected to use, the product. A product
|
||||
is a consumer product regardless of whether the product has substantial
|
||||
commercial, industrial or non-consumer uses, unless such uses represent
|
||||
the only significant mode of use of the product.
|
||||
|
||||
"Installation Information" for a User Product means any methods,
|
||||
procedures, authorization keys, or other information required to install
|
||||
and execute modified versions of a covered work in that User Product from
|
||||
a modified version of its Corresponding Source. The information must
|
||||
suffice to ensure that the continued functioning of the modified object
|
||||
code is in no case prevented or interfered with solely because
|
||||
modification has been made.
|
||||
|
||||
If you convey an object code work under this section in, or with, or
|
||||
specifically for use in, a User Product, and the conveying occurs as
|
||||
part of a transaction in which the right of possession and use of the
|
||||
User Product is transferred to the recipient in perpetuity or for a
|
||||
fixed term (regardless of how the transaction is characterized), the
|
||||
Corresponding Source conveyed under this section must be accompanied
|
||||
by the Installation Information. But this requirement does not apply
|
||||
if neither you nor any third party retains the ability to install
|
||||
modified object code on the User Product (for example, the work has
|
||||
been installed in ROM).
|
||||
|
||||
The requirement to provide Installation Information does not include a
|
||||
requirement to continue to provide support service, warranty, or updates
|
||||
for a work that has been modified or installed by the recipient, or for
|
||||
the User Product in which it has been modified or installed. Access to a
|
||||
network may be denied when the modification itself materially and
|
||||
adversely affects the operation of the network or violates the rules and
|
||||
protocols for communication across the network.
|
||||
|
||||
Corresponding Source conveyed, and Installation Information provided,
|
||||
in accord with this section must be in a format that is publicly
|
||||
documented (and with an implementation available to the public in
|
||||
source code form), and must require no special password or key for
|
||||
unpacking, reading or copying.
|
||||
|
||||
7. Additional Terms.
|
||||
|
||||
"Additional permissions" are terms that supplement the terms of this
|
||||
License by making exceptions from one or more of its conditions.
|
||||
Additional permissions that are applicable to the entire Program shall
|
||||
be treated as though they were included in this License, to the extent
|
||||
that they are valid under applicable law. If additional permissions
|
||||
apply only to part of the Program, that part may be used separately
|
||||
under those permissions, but the entire Program remains governed by
|
||||
this License without regard to the additional permissions.
|
||||
|
||||
When you convey a copy of a covered work, you may at your option
|
||||
remove any additional permissions from that copy, or from any part of
|
||||
it. (Additional permissions may be written to require their own
|
||||
removal in certain cases when you modify the work.) You may place
|
||||
additional permissions on material, added by you to a covered work,
|
||||
for which you have or can give appropriate copyright permission.
|
||||
|
||||
Notwithstanding any other provision of this License, for material you
|
||||
add to a covered work, you may (if authorized by the copyright holders of
|
||||
that material) supplement the terms of this License with terms:
|
||||
|
||||
a) Disclaiming warranty or limiting liability differently from the
|
||||
terms of sections 15 and 16 of this License; or
|
||||
|
||||
b) Requiring preservation of specified reasonable legal notices or
|
||||
author attributions in that material or in the Appropriate Legal
|
||||
Notices displayed by works containing it; or
|
||||
|
||||
c) Prohibiting misrepresentation of the origin of that material, or
|
||||
requiring that modified versions of such material be marked in
|
||||
reasonable ways as different from the original version; or
|
||||
|
||||
d) Limiting the use for publicity purposes of names of licensors or
|
||||
authors of the material; or
|
||||
|
||||
e) Declining to grant rights under trademark law for use of some
|
||||
trade names, trademarks, or service marks; or
|
||||
|
||||
f) Requiring indemnification of licensors and authors of that
|
||||
material by anyone who conveys the material (or modified versions of
|
||||
it) with contractual assumptions of liability to the recipient, for
|
||||
any liability that these contractual assumptions directly impose on
|
||||
those licensors and authors.
|
||||
|
||||
All other non-permissive additional terms are considered "further
|
||||
restrictions" within the meaning of section 10. If the Program as you
|
||||
received it, or any part of it, contains a notice stating that it is
|
||||
governed by this License along with a term that is a further
|
||||
restriction, you may remove that term. If a license document contains
|
||||
a further restriction but permits relicensing or conveying under this
|
||||
License, you may add to a covered work material governed by the terms
|
||||
of that license document, provided that the further restriction does
|
||||
not survive such relicensing or conveying.
|
||||
|
||||
If you add terms to a covered work in accord with this section, you
|
||||
must place, in the relevant source files, a statement of the
|
||||
additional terms that apply to those files, or a notice indicating
|
||||
where to find the applicable terms.
|
||||
|
||||
Additional terms, permissive or non-permissive, may be stated in the
|
||||
form of a separately written license, or stated as exceptions;
|
||||
the above requirements apply either way.
|
||||
|
||||
8. Termination.
|
||||
|
||||
You may not propagate or modify a covered work except as expressly
|
||||
provided under this License. Any attempt otherwise to propagate or
|
||||
modify it is void, and will automatically terminate your rights under
|
||||
this License (including any patent licenses granted under the third
|
||||
paragraph of section 11).
|
||||
|
||||
However, if you cease all violation of this License, then your
|
||||
license from a particular copyright holder is reinstated (a)
|
||||
provisionally, unless and until the copyright holder explicitly and
|
||||
finally terminates your license, and (b) permanently, if the copyright
|
||||
holder fails to notify you of the violation by some reasonable means
|
||||
prior to 60 days after the cessation.
|
||||
|
||||
Moreover, your license from a particular copyright holder is
|
||||
reinstated permanently if the copyright holder notifies you of the
|
||||
violation by some reasonable means, this is the first time you have
|
||||
received notice of violation of this License (for any work) from that
|
||||
copyright holder, and you cure the violation prior to 30 days after
|
||||
your receipt of the notice.
|
||||
|
||||
Termination of your rights under this section does not terminate the
|
||||
licenses of parties who have received copies or rights from you under
|
||||
this License. If your rights have been terminated and not permanently
|
||||
reinstated, you do not qualify to receive new licenses for the same
|
||||
material under section 10.
|
||||
|
||||
9. Acceptance Not Required for Having Copies.
|
||||
|
||||
You are not required to accept this License in order to receive or
|
||||
run a copy of the Program. Ancillary propagation of a covered work
|
||||
occurring solely as a consequence of using peer-to-peer transmission
|
||||
to receive a copy likewise does not require acceptance. However,
|
||||
nothing other than this License grants you permission to propagate or
|
||||
modify any covered work. These actions infringe copyright if you do
|
||||
not accept this License. Therefore, by modifying or propagating a
|
||||
covered work, you indicate your acceptance of this License to do so.
|
||||
|
||||
10. Automatic Licensing of Downstream Recipients.
|
||||
|
||||
Each time you convey a covered work, the recipient automatically
|
||||
receives a license from the original licensors, to run, modify and
|
||||
propagate that work, subject to this License. You are not responsible
|
||||
for enforcing compliance by third parties with this License.
|
||||
|
||||
An "entity transaction" is a transaction transferring control of an
|
||||
organization, or substantially all assets of one, or subdividing an
|
||||
organization, or merging organizations. If propagation of a covered
|
||||
work results from an entity transaction, each party to that
|
||||
transaction who receives a copy of the work also receives whatever
|
||||
licenses to the work the party's predecessor in interest had or could
|
||||
give under the previous paragraph, plus a right to possession of the
|
||||
Corresponding Source of the work from the predecessor in interest, if
|
||||
the predecessor has it or can get it with reasonable efforts.
|
||||
|
||||
You may not impose any further restrictions on the exercise of the
|
||||
rights granted or affirmed under this License. For example, you may
|
||||
not impose a license fee, royalty, or other charge for exercise of
|
||||
rights granted under this License, and you may not initiate litigation
|
||||
(including a cross-claim or counterclaim in a lawsuit) alleging that
|
||||
any patent claim is infringed by making, using, selling, offering for
|
||||
sale, or importing the Program or any portion of it.
|
||||
|
||||
11. Patents.
|
||||
|
||||
A "contributor" is a copyright holder who authorizes use under this
|
||||
License of the Program or a work on which the Program is based. The
|
||||
work thus licensed is called the contributor's "contributor version".
|
||||
|
||||
A contributor's "essential patent claims" are all patent claims
|
||||
owned or controlled by the contributor, whether already acquired or
|
||||
hereafter acquired, that would be infringed by some manner, permitted
|
||||
by this License, of making, using, or selling its contributor version,
|
||||
but do not include claims that would be infringed only as a
|
||||
consequence of further modification of the contributor version. For
|
||||
purposes of this definition, "control" includes the right to grant
|
||||
patent sublicenses in a manner consistent with the requirements of
|
||||
this License.
|
||||
|
||||
Each contributor grants you a non-exclusive, worldwide, royalty-free
|
||||
patent license under the contributor's essential patent claims, to
|
||||
make, use, sell, offer for sale, import and otherwise run, modify and
|
||||
propagate the contents of its contributor version.
|
||||
|
||||
In the following three paragraphs, a "patent license" is any express
|
||||
agreement or commitment, however denominated, not to enforce a patent
|
||||
(such as an express permission to practice a patent or covenant not to
|
||||
sue for patent infringement). To "grant" such a patent license to a
|
||||
party means to make such an agreement or commitment not to enforce a
|
||||
patent against the party.
|
||||
|
||||
If you convey a covered work, knowingly relying on a patent license,
|
||||
and the Corresponding Source of the work is not available for anyone
|
||||
to copy, free of charge and under the terms of this License, through a
|
||||
publicly available network server or other readily accessible means,
|
||||
then you must either (1) cause the Corresponding Source to be so
|
||||
available, or (2) arrange to deprive yourself of the benefit of the
|
||||
patent license for this particular work, or (3) arrange, in a manner
|
||||
consistent with the requirements of this License, to extend the patent
|
||||
license to downstream recipients. "Knowingly relying" means you have
|
||||
actual knowledge that, but for the patent license, your conveying the
|
||||
covered work in a country, or your recipient's use of the covered work
|
||||
in a country, would infringe one or more identifiable patents in that
|
||||
country that you have reason to believe are valid.
|
||||
|
||||
If, pursuant to or in connection with a single transaction or
|
||||
arrangement, you convey, or propagate by procuring conveyance of, a
|
||||
covered work, and grant a patent license to some of the parties
|
||||
receiving the covered work authorizing them to use, propagate, modify
|
||||
or convey a specific copy of the covered work, then the patent license
|
||||
you grant is automatically extended to all recipients of the covered
|
||||
work and works based on it.
|
||||
|
||||
A patent license is "discriminatory" if it does not include within
|
||||
the scope of its coverage, prohibits the exercise of, or is
|
||||
conditioned on the non-exercise of one or more of the rights that are
|
||||
specifically granted under this License. You may not convey a covered
|
||||
work if you are a party to an arrangement with a third party that is
|
||||
in the business of distributing software, under which you make payment
|
||||
to the third party based on the extent of your activity of conveying
|
||||
the work, and under which the third party grants, to any of the
|
||||
parties who would receive the covered work from you, a discriminatory
|
||||
patent license (a) in connection with copies of the covered work
|
||||
conveyed by you (or copies made from those copies), or (b) primarily
|
||||
for and in connection with specific products or compilations that
|
||||
contain the covered work, unless you entered into that arrangement,
|
||||
or that patent license was granted, prior to 28 March 2007.
|
||||
|
||||
Nothing in this License shall be construed as excluding or limiting
|
||||
any implied license or other defenses to infringement that may
|
||||
otherwise be available to you under applicable patent law.
|
||||
|
||||
12. No Surrender of Others' Freedom.
|
||||
|
||||
If conditions are imposed on you (whether by court order, agreement or
|
||||
otherwise) that contradict the conditions of this License, they do not
|
||||
excuse you from the conditions of this License. If you cannot convey a
|
||||
covered work so as to satisfy simultaneously your obligations under this
|
||||
License and any other pertinent obligations, then as a consequence you may
|
||||
not convey it at all. For example, if you agree to terms that obligate you
|
||||
to collect a royalty for further conveying from those to whom you convey
|
||||
the Program, the only way you could satisfy both those terms and this
|
||||
License would be to refrain entirely from conveying the Program.
|
||||
|
||||
13. Remote Network Interaction; Use with the GNU General Public License.
|
||||
|
||||
Notwithstanding any other provision of this License, if you modify the
|
||||
Program, your modified version must prominently offer all users
|
||||
interacting with it remotely through a computer network (if your version
|
||||
supports such interaction) an opportunity to receive the Corresponding
|
||||
Source of your version by providing access to the Corresponding Source
|
||||
from a network server at no charge, through some standard or customary
|
||||
means of facilitating copying of software. This Corresponding Source
|
||||
shall include the Corresponding Source for any work covered by version 3
|
||||
of the GNU General Public License that is incorporated pursuant to the
|
||||
following paragraph.
|
||||
|
||||
Notwithstanding any other provision of this License, you have
|
||||
permission to link or combine any covered work with a work licensed
|
||||
under version 3 of the GNU General Public License into a single
|
||||
combined work, and to convey the resulting work. The terms of this
|
||||
License will continue to apply to the part which is the covered work,
|
||||
but the work with which it is combined will remain governed by version
|
||||
3 of the GNU General Public License.
|
||||
|
||||
14. Revised Versions of this License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions of
|
||||
the GNU Affero General Public License from time to time. Such new versions
|
||||
will be similar in spirit to the present version, but may differ in detail to
|
||||
address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Program specifies that a certain numbered version of the GNU Affero General
|
||||
Public License "or any later version" applies to it, you have the
|
||||
option of following the terms and conditions either of that numbered
|
||||
version or of any later version published by the Free Software
|
||||
Foundation. If the Program does not specify a version number of the
|
||||
GNU Affero General Public License, you may choose any version ever published
|
||||
by the Free Software Foundation.
|
||||
|
||||
If the Program specifies that a proxy can decide which future
|
||||
versions of the GNU Affero General Public License can be used, that proxy's
|
||||
public statement of acceptance of a version permanently authorizes you
|
||||
to choose that version for the Program.
|
||||
|
||||
Later license versions may give you additional or different
|
||||
permissions. However, no additional obligations are imposed on any
|
||||
author or copyright holder as a result of your choosing to follow a
|
||||
later version.
|
||||
|
||||
15. Disclaimer of Warranty.
|
||||
|
||||
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
|
||||
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
|
||||
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
|
||||
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
|
||||
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
|
||||
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
|
||||
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. Limitation of Liability.
|
||||
|
||||
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
|
||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
|
||||
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
|
||||
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
|
||||
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
|
||||
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
|
||||
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
|
||||
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
|
||||
SUCH DAMAGES.
|
||||
|
||||
17. Interpretation of Sections 15 and 16.
|
||||
|
||||
If the disclaimer of warranty and limitation of liability provided
|
||||
above cannot be given local legal effect according to their terms,
|
||||
reviewing courts shall apply local law that most closely approximates
|
||||
an absolute waiver of all civil liability in connection with the
|
||||
Program, unless a warranty or assumption of liability accompanies a
|
||||
copy of the Program in return for a fee.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Programs
|
||||
|
||||
If you develop a new program, and you want it to be of the greatest
|
||||
possible use to the public, the best way to achieve this is to make it
|
||||
free software which everyone can redistribute and change under these terms.
|
||||
|
||||
To do so, attach the following notices to the program. It is safest
|
||||
to attach them to the start of each source file to most effectively
|
||||
state the exclusion of warranty; and each file should have at least
|
||||
the "copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the program's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This program is free software: you can redistribute it and/or modify
|
||||
it under the terms of the GNU Affero General Public License as published by
|
||||
the Free Software Foundation, either version 3 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU Affero General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Affero General Public License
|
||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
If your software can interact with users remotely through a computer
|
||||
network, you should also make sure that it provides a way for users to
|
||||
get its source. For example, if your program is a web application, its
|
||||
interface could display a "Source" link that leads users to an archive
|
||||
of the code. There are many ways you could offer source, and different
|
||||
solutions will be better for different programs; see section 13 for the
|
||||
specific requirements.
|
||||
|
||||
You should also get your employer (if you work as a programmer) or school,
|
||||
if any, to sign a "copyright disclaimer" for the program, if necessary.
|
||||
For more information on this, and how to apply and follow the GNU AGPL, see
|
||||
<http://www.gnu.org/licenses/>.
|
45
fresnel.cabal
Normal file
45
fresnel.cabal
Normal file
@ -0,0 +1,45 @@
|
||||
name: fresnel
|
||||
version: 0.1.0.0
|
||||
synopsis: Prism-based grammars for parsing and printing
|
||||
description:
|
||||
fresnel provides combinators for composing prisms and isos
|
||||
into grammars that can be used for both parsing and printing.
|
||||
|
||||
Grammars can read (or print to) any type that has an instance of
|
||||
'Cons s s a a'.
|
||||
|
||||
homepage: https://github.com/frasertweedal/hs-fresnel
|
||||
bug-reports: https://github.com/frasertweedal/hs-fresnel/issues
|
||||
license: AGPL-3
|
||||
license-file: agpl-3.0.txt
|
||||
author: Fraser Tweedale
|
||||
maintainer: frase@frase.id.au
|
||||
copyright: Copyright (C) 2015 Fraser Tweedale
|
||||
category: Data
|
||||
build-type: Simple
|
||||
-- extra-source-files:
|
||||
cabal-version: >=1.10
|
||||
|
||||
source-repository head
|
||||
type: git
|
||||
location: https://github.com/frasertweedale/hs-fresnel
|
||||
|
||||
library
|
||||
exposed-modules:
|
||||
Data.Fresnel
|
||||
, Data.Fresnel.Char
|
||||
, Data.Fresnel.TH
|
||||
-- other-modules:
|
||||
hs-source-dirs: src
|
||||
default-language: Haskell2010
|
||||
ghc-options: -Wall
|
||||
|
||||
build-depends:
|
||||
base >= 4 && < 5
|
||||
, template-haskell
|
||||
, bifunctors
|
||||
, lens
|
||||
, semigroups
|
||||
|
||||
if impl(ghc < 7.10)
|
||||
build-depends: nats
|
369
src/Data/Fresnel.hs
Normal file
369
src/Data/Fresnel.hs
Normal file
@ -0,0 +1,369 @@
|
||||
-- This file is part of fresnel
|
||||
-- Copyright (C) 2015 Fraser Tweedale
|
||||
--
|
||||
-- fresnel is free software: you can redistribute it and/or modify
|
||||
-- it under the terms of the GNU Affero General Public License as published by
|
||||
-- the Free Software Foundation, either version 3 of the License, or
|
||||
-- (at your option) any later version.
|
||||
--
|
||||
-- This program is distributed in the hope that it will be useful,
|
||||
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
-- GNU Affero General Public License for more details.
|
||||
--
|
||||
-- You should have received a copy of the GNU Affero General Public License
|
||||
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
{-# LANGUAGE RankNTypes #-}
|
||||
|
||||
module Data.Fresnel
|
||||
(
|
||||
-- | Grammars
|
||||
Grammar
|
||||
, parse
|
||||
, print
|
||||
|
||||
-- | Grammar constructors and combinators
|
||||
, element
|
||||
, satisfy
|
||||
, symbol
|
||||
, many
|
||||
, many1
|
||||
, (<<*)
|
||||
, (*>>)
|
||||
, between
|
||||
, literal
|
||||
, def
|
||||
, opt
|
||||
, eof
|
||||
, productG
|
||||
, (<<*>>)
|
||||
, sumG
|
||||
, (<<+>>)
|
||||
, replicateG
|
||||
, bindG
|
||||
, adapt
|
||||
, (<<$>>)
|
||||
|
||||
-- | Re-exports
|
||||
, Cons
|
||||
) where
|
||||
|
||||
import Prelude hiding (print)
|
||||
import Control.Applicative ((<$>), pure)
|
||||
import Control.Monad ((>=>))
|
||||
import Data.Bifunctor (first)
|
||||
import Data.Monoid (Monoid, mempty)
|
||||
import Numeric.Natural (Natural)
|
||||
|
||||
import Control.Lens hiding (element)
|
||||
import Data.List.NonEmpty (NonEmpty(..))
|
||||
|
||||
-- $setup
|
||||
-- >>> import Data.Char
|
||||
-- >>> import Data.Fresnel.Char
|
||||
|
||||
|
||||
type Grammar s a = Prism' s (a, s)
|
||||
|
||||
element :: Cons s s a a => Grammar s a
|
||||
element = _Cons
|
||||
|
||||
satisfy :: Cons s s a a => (a -> Bool) -> Grammar s a
|
||||
satisfy f = prism id (\a -> if f a then Right a else Left a) <<$>> element
|
||||
|
||||
symbol :: (Cons s s a a, Eq a) => a -> Grammar s a
|
||||
symbol a = satisfy (== a)
|
||||
|
||||
-- | Adapt the 'Grammar' with a 'Prism' or 'Iso'
|
||||
--
|
||||
-- >>> let g = reversed `adapt` many (satisfy isAlpha)
|
||||
-- >>> parse g "live!"
|
||||
-- Just "evil"
|
||||
-- >>> print g "evil" :: String
|
||||
-- "live"
|
||||
--
|
||||
-- >>> let shouting s = if all (not . isLower) s then Right (fmap toLower s) else Left s
|
||||
-- >>> let g = prism (fmap toUpper) shouting <<$>> many element
|
||||
-- >>> parse g "WOW!!!"
|
||||
-- Just "wow!!!"
|
||||
-- >>> parse g "meh"
|
||||
-- Nothing
|
||||
-- >>> print g "hello world" :: String
|
||||
-- "HELLO WORLD"
|
||||
--
|
||||
adapt, (<<$>>) :: Prism' a b -> Grammar s a -> Grammar s b
|
||||
adapt p g = withPrism g $ \as sesa ->
|
||||
withPrism p $ \ba aeab ->
|
||||
let
|
||||
bs (b, s) = as (ba b, s)
|
||||
sesb = sesa >=> \(a, s') -> case aeab a of
|
||||
Left _ -> Left s'
|
||||
Right b -> Right (b, s')
|
||||
in prism bs sesb
|
||||
(<<$>>) = adapt
|
||||
infixr 4 <<$>>
|
||||
|
||||
-- | Sequence two grammars and combine their results as a tuple
|
||||
--
|
||||
-- >>> let g = integralG <<*>> many (satisfy isAlpha)
|
||||
-- >>> parse g "-10abc"
|
||||
-- Just (-10,"abc")
|
||||
-- >>> print g (42, "xyz") :: String
|
||||
-- "42xyz"
|
||||
--
|
||||
productG, (<<*>>) :: Grammar s a -> Grammar s b -> Grammar s (a, b)
|
||||
productG p p' = withPrism p $ \as sesa ->
|
||||
withPrism p' $ \bs sesb ->
|
||||
let
|
||||
as' ((a, b), s) = as (a, bs (b, s))
|
||||
sesa' = sesa >=> \(a, s') -> do
|
||||
(b, s'') <- sesb s'
|
||||
pure ((a, b), s'')
|
||||
in prism as' sesa'
|
||||
(<<*>>) = productG
|
||||
infixr 6 <<*>>
|
||||
|
||||
|
||||
-- | Choice between two grammars
|
||||
--
|
||||
-- >>> let g = integralG <<+>> (many (satisfy isAlpha))
|
||||
-- >>> parse g "-10!"
|
||||
-- Just (Left (-10))
|
||||
-- >>> parse g "abc!"
|
||||
-- Just (Right "abc")
|
||||
-- >>> print g (Left 42) :: String
|
||||
-- "42"
|
||||
-- >>> print g (Right "xyz") :: String
|
||||
-- "xyz"
|
||||
--
|
||||
sumG, (<<+>>) :: Grammar s a -> Grammar s b -> Grammar s (Either a b)
|
||||
sumG p1 p2 = withPrism p1 $ \as sesa ->
|
||||
withPrism p2 $ \bs sesb ->
|
||||
let
|
||||
eabs (Left a, s) = as (a, s)
|
||||
eabs (Right b, s) = bs (b, s)
|
||||
seseab s = case sesa s of
|
||||
Left _ -> first Right <$> sesb s
|
||||
r -> first Left <$> r
|
||||
in prism eabs seseab
|
||||
(<<+>>) = sumG
|
||||
infixr 5 <<+>>
|
||||
|
||||
-- | Run the grammar as many times as possible on the input,
|
||||
-- returning or consuming a list.
|
||||
--
|
||||
-- >>> let g = many (satisfy isAlpha)
|
||||
-- >>> parse g ""
|
||||
-- Just ""
|
||||
-- >>> parse g "abc!"
|
||||
-- Just "abc"
|
||||
-- >>> print g "xyz" :: String
|
||||
-- "xyz"
|
||||
--
|
||||
many :: Grammar s a -> Grammar s [a]
|
||||
many p = withPrism p $ \bt seta ->
|
||||
let
|
||||
bt' ([], s) = s
|
||||
bt' (a:as, s) = bt (a, bt' (as, s))
|
||||
seta' s = case seta s of
|
||||
Left _ -> Right ([], s)
|
||||
Right (a, s') -> first (a:) <$> seta' s'
|
||||
in prism bt' seta'
|
||||
|
||||
-- | Run the grammar as many times as possible and at least once.
|
||||
--
|
||||
-- >>> let g = many1 (satisfy isDigit)
|
||||
-- >>> parse g ""
|
||||
-- Nothing
|
||||
-- >>> parse g "42"
|
||||
-- Just ('4' :| "2")
|
||||
-- >>> print g ('1' :| "23") :: String
|
||||
-- "123"
|
||||
--
|
||||
many1 :: Grammar s a -> Grammar s (NonEmpty a)
|
||||
many1 g = isoTupleNEL <<$>> g <<*>> many g where
|
||||
isoTupleNEL :: Iso' (a, [a]) (NonEmpty a)
|
||||
isoTupleNEL = iso (uncurry (:|)) (\(h :| t) -> (h, t))
|
||||
|
||||
-- | Sequence two grammars, ignoring the second value.
|
||||
--
|
||||
-- >>> let g = integralG <<* literal '~'
|
||||
-- >>> parse g "123~"
|
||||
-- Just 123
|
||||
-- >>> parse g "123!"
|
||||
-- Nothing
|
||||
-- >>> print g 123 :: String
|
||||
-- "123~"
|
||||
--
|
||||
(<<*) :: Grammar s a -> Grammar s () -> Grammar s a
|
||||
p <<* p' = withPrism p $ \as sesa ->
|
||||
withPrism p' $ \bs sesb ->
|
||||
let
|
||||
as' (a, s) = as (a, bs ((), s))
|
||||
sesa' = sesa >=> \(a, s') -> do
|
||||
((), s'') <- sesb s'
|
||||
pure (a, s'')
|
||||
in prism as' sesa'
|
||||
|
||||
-- | Sequence two grammars, ignoring the first value.
|
||||
--
|
||||
-- >>> let g = literal '~' *>> integralG
|
||||
-- >>> parse g "~123"
|
||||
-- Just 123
|
||||
-- >>> parse g "123"
|
||||
-- Nothing
|
||||
-- >>> print g 123 :: String
|
||||
-- "~123"
|
||||
--
|
||||
(*>>) :: Grammar s () -> Grammar s a -> Grammar s a
|
||||
p *>> p' = withPrism p $ \as sesa ->
|
||||
withPrism p' $ \bs sesb ->
|
||||
let
|
||||
as' (b, s) = as ((), bs (b, s))
|
||||
sesa' = sesa >=> \((), s') -> do
|
||||
(b, s'') <- sesb s'
|
||||
pure (b, s'')
|
||||
in prism as' sesa'
|
||||
|
||||
-- | Replicate a grammar N times
|
||||
--
|
||||
-- >>> let g = replicateG 3 (satisfy isAlpha)
|
||||
-- >>> parse g "ab3"
|
||||
-- Nothing
|
||||
-- >>> parse g "abc"
|
||||
-- Just "abc"
|
||||
-- >>> print g "abcd" :: String -- note there are FOUR dots
|
||||
-- "abc"
|
||||
-- >>> print g "ab" :: String -- can't do much about this
|
||||
-- "ab"
|
||||
--
|
||||
replicateG :: Natural -> Grammar s a -> Grammar s [a]
|
||||
replicateG n g = withPrism g $ \as sesa ->
|
||||
let
|
||||
ass = ass' n
|
||||
ass' 0 (_, s) = s
|
||||
ass' _ ([], s) = s
|
||||
ass' n' (x:xs, s) = as (x, ass' (n' - 1) (xs, s))
|
||||
sesas = sesas' n
|
||||
sesas' 0 = \s -> Right ([], s)
|
||||
sesas' n' = sesa >=> \(a, s') -> first (a:) <$> sesas' (n' - 1) s'
|
||||
in prism ass sesas
|
||||
|
||||
-- | Sequence a grammar based on functions that return the next
|
||||
-- grammar and yield a determinant.
|
||||
--
|
||||
-- >>> let g = bindG integralG (\n -> replicateG n (satisfy isAlpha)) (fromIntegral . length)
|
||||
-- >>> parse g "3abc2de?"
|
||||
-- Just "abc"
|
||||
-- >>> parse g "3ab2de?"
|
||||
-- Nothing
|
||||
-- >>> parse (many g) "3abc2de1f?"
|
||||
-- Just ["abc","de","f"]
|
||||
-- >>> print (many g) ["hello", "world"] :: String
|
||||
-- "5hello5world"
|
||||
--
|
||||
bindG :: Grammar s a -> (a -> Grammar s b) -> (b -> a) -> Grammar s b
|
||||
bindG g f ba = withPrism g $ \as sesa ->
|
||||
let
|
||||
bs (b, s) = let a = ba b in as (a, review (f a) (b, s))
|
||||
sesb = sesa >=> \(a, s') -> withPrism (f a) $ \_ sesb' -> sesb' s'
|
||||
in prism bs sesb
|
||||
|
||||
-- | Given left and right "surrounding" grammars and an interior
|
||||
-- grammar sequence all three, discarding the surrounds.
|
||||
--
|
||||
-- >>> let g = between (literal '<') (literal '>') integralG
|
||||
-- >>> parse g "<-123>"
|
||||
-- Just (-123)
|
||||
-- >>> print g 42 :: String
|
||||
-- "<42>"
|
||||
--
|
||||
between :: Grammar s () -> Grammar s () -> Grammar s a -> Grammar s a
|
||||
between l r a = l *>> a <<* r
|
||||
|
||||
-- | Consumes or produces a literal character (mapped to '()').
|
||||
--
|
||||
-- >>> let g = literal '$'
|
||||
-- >>> parse g "$~"
|
||||
-- Just ()
|
||||
-- >>> print g () :: String
|
||||
-- "$"
|
||||
--
|
||||
literal :: (Cons s s a a, Eq a) => a -> Grammar s ()
|
||||
literal a = withPrism (symbol a) $ \_ sesa ->
|
||||
prism (\((), s) -> cons a s) (fmap (first (const ())) . sesa)
|
||||
|
||||
-- | Give a default value for a grammar.
|
||||
--
|
||||
-- A defaulted grammar can always be viewed. If a reviewed value
|
||||
-- is equal to the default nothing is written.
|
||||
--
|
||||
-- >>> let g = def 0 integralG
|
||||
-- >>> parse g "1~"
|
||||
-- Just 1
|
||||
-- >>> parse g "~"
|
||||
-- Just 0
|
||||
-- >>> print g 1 :: String
|
||||
-- "1"
|
||||
-- >>> print g 0 :: String
|
||||
-- ""
|
||||
--
|
||||
def :: Eq a => a -> Grammar s a -> Grammar s a
|
||||
def a' p = withPrism p $ \as sesa ->
|
||||
let
|
||||
as' (a, s) = if a == a' then s else as (a, s)
|
||||
sesa' s = either (const (Right (a', s))) Right (sesa s)
|
||||
in prism as' sesa'
|
||||
|
||||
-- | Make a grammar optional; a failed view yields 'Nothing' and
|
||||
-- a review of 'Nothing' writes nothing.
|
||||
--
|
||||
-- >>> let g = opt integralG
|
||||
-- >>> parse g "1~"
|
||||
-- Just (Just 1)
|
||||
-- >>> parse g "~"
|
||||
-- Just Nothing
|
||||
-- >>> print g (Just 1) :: String
|
||||
-- "1"
|
||||
-- >>> print g Nothing :: String
|
||||
-- ""
|
||||
--
|
||||
opt :: Grammar s a -> Grammar s (Maybe a)
|
||||
opt p = withPrism p $ \as sesa ->
|
||||
let
|
||||
as' (Just a, s) = as (a, s)
|
||||
as' (Nothing, s) = s
|
||||
sesa' s = case sesa s of
|
||||
Left _ -> pure (Nothing, s)
|
||||
Right (a, s') -> Right (Just a, s')
|
||||
in prism as' sesa'
|
||||
|
||||
-- | Matches at end of input; writes nothing
|
||||
--
|
||||
-- >>> parse eof ""
|
||||
-- Just ()
|
||||
-- >>> parse eof "~"
|
||||
-- Nothing
|
||||
-- >>> print eof () :: String
|
||||
-- ""
|
||||
--
|
||||
eof :: Cons s s a a => Grammar s ()
|
||||
eof = prism as sesa where
|
||||
as ((), s) = s
|
||||
sesa s = case uncons s of
|
||||
Just _ -> Left s
|
||||
Nothing -> Right ((), s)
|
||||
|
||||
-- | Parse with a grammar, discarding any remaining input.
|
||||
--
|
||||
-- If remaining input is an error, apply '(<<* eof)'
|
||||
-- to your grammar first.
|
||||
--
|
||||
parse :: Grammar s b -> s -> Maybe b
|
||||
parse g s = fst <$> preview g s
|
||||
|
||||
-- | Print with a grammar
|
||||
--
|
||||
print :: Monoid s => Grammar s b -> b -> s
|
||||
print g b = review g (b, mempty)
|
51
src/Data/Fresnel/Char.hs
Normal file
51
src/Data/Fresnel/Char.hs
Normal file
@ -0,0 +1,51 @@
|
||||
-- This file is part of fresnel
|
||||
-- Copyright (C) 2015 Fraser Tweedale
|
||||
--
|
||||
-- fresnel is free software: you can redistribute it and/or modify
|
||||
-- it under the terms of the GNU Affero General Public License as published by
|
||||
-- the Free Software Foundation, either version 3 of the License, or
|
||||
-- (at your option) any later version.
|
||||
--
|
||||
-- This program is distributed in the hope that it will be useful,
|
||||
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
-- GNU Affero General Public License for more details.
|
||||
--
|
||||
-- You should have received a copy of the GNU Affero General Public License
|
||||
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
{-# LANGUAGE FlexibleContexts #-}
|
||||
{-# LANGUAGE TupleSections #-}
|
||||
{-# OPTIONS_GHC -ddump-splices #-}
|
||||
|
||||
module Data.Fresnel.Char
|
||||
(
|
||||
integralG
|
||||
) where
|
||||
|
||||
import Prelude hiding (print)
|
||||
import Control.Lens
|
||||
import Data.Char (isDigit)
|
||||
|
||||
import Data.Fresnel
|
||||
|
||||
-- $setup
|
||||
-- >>> import Numeric.Natural
|
||||
-- >>> import Data.Fresnel
|
||||
|
||||
-- |
|
||||
-- >>> parse integralG "01." :: Maybe Integer
|
||||
-- Just 1
|
||||
-- >>> parse integralG "-1" :: Maybe Natural
|
||||
-- Nothing
|
||||
-- >>> print integralG 42 :: String
|
||||
-- "42"
|
||||
-- >>> print integralG (-42) :: String
|
||||
-- "-42"
|
||||
--
|
||||
integralG
|
||||
:: (Cons s s Char Char, Integral a, Read a, Show a)
|
||||
=> Grammar s a
|
||||
integralG =
|
||||
iso (\(c,s) -> maybe s (:s) c) (Nothing,) . _Show
|
||||
<<$>> productG (opt (symbol '-')) (many (satisfy isDigit))
|
153
src/Data/Fresnel/TH.hs
Normal file
153
src/Data/Fresnel/TH.hs
Normal file
@ -0,0 +1,153 @@
|
||||
-- This file is part of fresnel. It contains modified code from
|
||||
-- roundtrip, which contains modified code from Tillmann Rendel's
|
||||
-- partial-isomorphisms and invertible-syntax packages.
|
||||
--
|
||||
-- Copyright (c) 2010-11 University of Marburg
|
||||
-- Copyright (c) 2011 factis research GmbH
|
||||
-- Copyright (C) 2015 Fraser Tweedale
|
||||
--
|
||||
-- Redistribution and use in source and binary forms, with or without
|
||||
-- modification, are permitted provided that the following conditions are met:
|
||||
--
|
||||
-- * Redistributions of source code must retain the above copyright
|
||||
-- notice, this list of conditions and the following disclaimer.
|
||||
--
|
||||
-- * Redistributions in binary form must reproduce the above
|
||||
-- copyright notice, this list of conditions and the following
|
||||
-- disclaimer in the documentation and/or other materials provided
|
||||
-- with the distribution.
|
||||
--
|
||||
-- * Neither the name of factis research GmbH nor the names of other
|
||||
-- contributors may be used to endorse or promote products derived
|
||||
-- from this software without specific prior written permission.
|
||||
--
|
||||
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||||
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||||
-- OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||||
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||||
-- LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||||
-- DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||||
-- THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||||
-- OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||||
|
||||
{-# LANGUAGE TemplateHaskell #-}
|
||||
|
||||
module Data.Fresnel.TH
|
||||
(
|
||||
makeIso
|
||||
, makeIsoWith
|
||||
|
||||
-- | Re-exports from 'Control.Lens'
|
||||
, Iso'
|
||||
, iso
|
||||
) where
|
||||
|
||||
import Control.Applicative ((<$>))
|
||||
import Control.Monad (replicateM, zipWithM)
|
||||
import Language.Haskell.TH
|
||||
|
||||
import Control.Lens
|
||||
|
||||
-- | Make an 'Iso' for the named type.
|
||||
--
|
||||
-- Product types are isomorphic to right-leaning nested tuples.
|
||||
-- Sum types are isomorphic to a right-leaning nested 'Either'
|
||||
-- structure.
|
||||
--
|
||||
-- The name of the 'Iso' is the type name prepended with a '_'.
|
||||
--
|
||||
makeIso :: Name -> Q [Dec]
|
||||
makeIso = makeIsoWith ('_':)
|
||||
|
||||
-- | Make an 'Iso' with an explicit function to derive its name.
|
||||
--
|
||||
makeIsoWith :: (String -> String) -> Name -> Q [Dec]
|
||||
makeIsoWith f d = do
|
||||
info <- reify d
|
||||
let
|
||||
(n, cs) = case info of
|
||||
TyConI (DataD _ n' _ cs' _) -> (n', cs')
|
||||
TyConI (NewtypeD _ n' _ c _) -> (n', [c])
|
||||
_ -> error $ show d
|
||||
++ " neither denotes a data or newtype declaration. Found: "
|
||||
++ show info
|
||||
let n' = rename f n
|
||||
sig <- sigFromName n' n cs
|
||||
body <- defFromName n' cs
|
||||
return [sig, body]
|
||||
|
||||
sigFromName :: Name -> Name -> [Con] -> Q Dec
|
||||
sigFromName n' n cs = sigD n'
|
||||
(conT (mkName "Iso'") `appT` sigFromCons cs `appT` conT n)
|
||||
|
||||
sigFromCons :: [Con] -> TypeQ
|
||||
sigFromCons [] = error "makeIso not available for zero-constructor types"
|
||||
sigFromCons [c] = return (sigFromCon c)
|
||||
sigFromCons (c:cs) =
|
||||
conT (mkName "Either") `appT` return (sigFromCon c) `appT` sigFromCons cs
|
||||
|
||||
sigFromCon :: Con -> Type
|
||||
sigFromCon (NormalC _ fields) = sigFromTypes (map (view _2) fields)
|
||||
sigFromCon (RecC _ fields) = sigFromTypes (map (view _3) fields)
|
||||
sigFromCon (InfixC (_,t1) _ (_,t2)) = sigFromTypes [t1, t2]
|
||||
sigFromCon (ForallC {}) =
|
||||
error "makeIso not available for existential data constructors"
|
||||
|
||||
sigFromTypes :: [Type] -> Type
|
||||
sigFromTypes [] = TupleT 0
|
||||
sigFromTypes [t] = t
|
||||
sigFromTypes (t:ts) = TupleT 2 `AppT` t `AppT` sigFromTypes ts
|
||||
|
||||
defFromName :: Name -> [Con] -> Q Dec
|
||||
defFromName n' cs = do
|
||||
wheres <- whereFromCons cs
|
||||
funD n' [clause [] (normalB expr) (fmap return wheres)]
|
||||
where
|
||||
expr = varE (mkName "iso") `appE` varE (mkName "f") `appE` varE (mkName "g")
|
||||
|
||||
whereFromCons :: [Con] -> Q [Dec]
|
||||
whereFromCons cs = do
|
||||
(fs, gs) <- unzip <$> zipWithM (fgFromCon (length cs)) [0..] cs
|
||||
fDec <- funD (mkName "f") (fmap return fs)
|
||||
gDec <- funD (mkName "g") (fmap return gs)
|
||||
return [fDec, gDec]
|
||||
|
||||
fgFromCon :: Int -> Int -> Con -> Q (Clause, Clause)
|
||||
fgFromCon nCons i (NormalC n fields) = fgClauses nCons i (length fields) n
|
||||
fgFromCon nCons i (RecC n fields) = fgClauses nCons i (length fields) n
|
||||
fgFromCon nCons i (InfixC _ n _) = fgClauses nCons i 2 n
|
||||
fgFromCon _ _ (ForallC {}) =
|
||||
error "makeIso not available for existential data constructors"
|
||||
|
||||
fgClauses :: Int -> Int -> Int -> Name -> Q (Clause, Clause)
|
||||
fgClauses nCons i nFields n = do
|
||||
(pats, exprs) <- genPE nFields
|
||||
let
|
||||
fPat = nestedSum (\s -> conP (mkName s) . (:[])) nCons i (nested tupP pats)
|
||||
gExp = nestedSum (appE . conE . mkName) nCons i (nested tupE exprs)
|
||||
fClause <- clause [fPat] (normalB [| $(foldl appE (conE n) exprs) |]) []
|
||||
gClause <- clause [conP n pats] (normalB gExp) []
|
||||
return (fClause, gClause)
|
||||
|
||||
rename :: (String -> String) -> Name -> Name
|
||||
rename f = mkName . f . nameBase
|
||||
|
||||
genPE :: Int -> Q ([PatQ], [ExpQ])
|
||||
genPE number = do
|
||||
ids <- replicateM number (newName "x")
|
||||
return (map varP ids, map varE ids)
|
||||
|
||||
nestedSum :: (String -> t -> t) -> Int -> Int -> t -> t
|
||||
nestedSum _ 1 _ pat = pat
|
||||
nestedSum f n i pat =
|
||||
foldr (.) id
|
||||
(replicate i (f "Right"))
|
||||
(if i < n - 1 then f "Left" pat else pat)
|
||||
|
||||
nested :: ([t] -> t) -> [t] -> t
|
||||
nested tup [] = tup []
|
||||
nested _ [x] = x
|
||||
nested tup (x:xs) = tup [x, nested tup xs]
|
32
stack.yaml
Normal file
32
stack.yaml
Normal file
@ -0,0 +1,32 @@
|
||||
# For more information, see: https://github.com/commercialhaskell/stack/blob/release/doc/yaml_configuration.md
|
||||
|
||||
# Specifies the GHC version and set of packages available (e.g., lts-3.5, nightly-2015-09-21, ghc-7.10.2)
|
||||
resolver: lts-3.18
|
||||
|
||||
# Local packages, usually specified by relative directory name
|
||||
packages:
|
||||
- '.'
|
||||
|
||||
# Packages to be pulled from upstream that are not in the resolver (e.g., acme-missiles-0.3)
|
||||
extra-deps: []
|
||||
|
||||
# Override default flag values for local packages and extra-deps
|
||||
flags: {}
|
||||
|
||||
# Extra package databases containing global packages
|
||||
extra-package-dbs: []
|
||||
|
||||
# Control whether we use the GHC we find on the path
|
||||
# system-ghc: true
|
||||
|
||||
# Require a specific version of stack, using version ranges
|
||||
# require-stack-version: -any # Default
|
||||
# require-stack-version: >= 0.1.10.0
|
||||
|
||||
# Override the architecture used by stack, especially useful on Windows
|
||||
# arch: i386
|
||||
# arch: x86_64
|
||||
|
||||
# Extra directories used by stack for building
|
||||
# extra-include-dirs: [/path/to/dir]
|
||||
# extra-lib-dirs: [/path/to/dir]
|
Loading…
Reference in New Issue
Block a user