gdritter repos telml / 9ac3b1a
Bump version + add telml-parse helpers Getty Ritter 6 years ago
5 changed file(s) with 117 addition(s) and 2 deletion(s). Collapse all Expand all
1 packages: telml/telml.cabal, telml-markup/telml-markup.cabal
1 packages:
2 telml/telml.cabal,
3 telml-parse/telml-parse.cabal,
4 telml-markup/telml-markup.cabal
1515 exposed-modules: Data.TeLML
1616 ghc-options: -Wall
1717 other-modules: Data.TeLML.Parser, Data.TeLML.Type
18 build-depends: base >=4.7 && <4.9,
18 build-depends: base >=4.7 && <5,
1919 deepseq >=1.4 && <2
2020 default-language: Haskell2010
2121
1 {-# LANGUAGE RecordWildCards #-}
2
3 module Data.TeLML.Parse
4 ( Fragment(..)
5 , Document
6 , Parse
7 , decode
8 , parse
9 , select
10 , field
11 , text
12 , document
13 , arg
14 , both
15 ) where
16
17 import Data.TeLML
18
19 newtype Parse t a = Parse { runParse :: t -> Either String a }
20
21 decode :: String -> Parse Document r -> Either String r
22 decode str content = case parse str of
23 Left err -> Left err
24 Right x -> runParse content x
25
26 instance Functor (Parse t) where
27 fmap f (Parse g) = Parse (\ x -> fmap f (g x))
28
29 instance Applicative (Parse t) where
30 pure x = Parse (\ _ -> Right x)
31 f <*> x =
32 f >>= \ f' ->
33 x >>= \ x' ->
34 pure (f' x')
35
36 instance Monad (Parse t) where
37 Parse x >>= f = Parse $ \ s ->
38 case x s of
39 Left err -> Left err
40 Right v -> runParse (f v) s
41
42 select :: String -> Parse [Document] t -> Parse Document [t]
43 select name content = Parse $ \ s -> each s
44 where
45 each [] = return []
46 each (Tag t doc:xs)
47 | t == name = (:) <$> runParse content doc <*> each xs
48 each (_:xs) = each xs
49
50 field :: String -> (Parse [Document] t) -> Parse Document t
51 field name content = Parse $ \ s -> find s
52 where
53 find [] = Left ("Unable to find tag \\" ++ name)
54 find (Tag t doc:_)
55 | t == name = runParse content doc
56 find (_:xs) = find xs
57
58 arg :: Parse Document t -> Parse [Document] t
59 arg f = Parse $ \ s ->
60 case s of
61 [x] -> runParse f x
62 _ -> Left ("Wrong arity for `arg`: " ++ show (length s))
63
64
65 both :: Parse Document a -> Parse Document b -> Parse [Document] (a, b)
66 both l r = Parse $ \ s ->
67 case s of
68 [a, b] -> (,) <$> runParse l a <*> runParse r b
69 _ -> Left ("Wrong arity for `both`: " ++ show (length s))
70
71 text :: Parse Document String
72 text = Parse (\ s -> concat <$> traverse go s)
73 where go (Text str) = Right str
74 go (Tag t _) = Left ("Expected Text fragment, found \\" ++ show t)
75
76 document :: Parse Document Document
77 document = Parse (\ s -> Right s)
1 Copyright (c) 2018, Getty Ritter
2 All rights reserved.
3
4 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
5
6 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
7
8 2. 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.
9
10 3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
11
12 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 HOLDER 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.
1 name: telml-parse
2 version: 0.1.0.0
3 synopsis: A lightweight TeX-like markup format.
4 description: A lightweight TeX-like markup format.
5 license: BSD3
6 license-file: LICENSE
7 author: Getty Ritter <gettylefou@gmail.com>
8 maintainer: Getty Ritter <gettylefou@gmail.com>
9 copyright: ©2018 Getty Ritter
10 category: Data
11 build-type: Simple
12 cabal-version: >=1.10
13
14 library
15 exposed-modules: Data.TeLML.Parse
16 ghc-options: -Wall
17 build-depends: base >=4.7 && <5,
18 telml ==0.1.0.0
19 default-language: Haskell2010
20
21 source-repository head
22 type: git
23 location: https://github.com/aisamanra/telml