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+ GNU AFFERO GENERAL PUBLIC LICENSE
+ Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+ Preamble
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+ 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/>.
--- /dev/null
+{-# LANGUAGE NoMonomorphismRestriction #-}
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE Rank2Types #-}
+
+-- Based in part on
+-- https://github.com/ekmett/trifecta/blob/master/examples/RFC2616.hs
+-- as well as the trifecta code itself
+--
+-- TODO:
+-- We might want to use T.T.Literate, too, in the end.
+-- Doesn't understand dynabase literals ("{ ... }")
+-- Doesn't handle parenthesized aggregators
+-- Doesn't handle shared subgoals ("whenever ... { ... }")
+-- Doesn't understand "foo." style rules.
+
+module Dyna.ParserHS.Parser (
+ Term(..), dterm, dtexpr,
+ Rule(..), drule, Line(..), dline, dlines
+) where
+
+import Control.Applicative
+import qualified Data.ByteString.UTF8 as BU
+import qualified Data.ByteString as B
+import Data.Char (isSpace)
+import qualified Data.HashSet as H
+import Data.Semigroup ((<>))
+import Data.Monoid (mempty)
+import Text.Trifecta
+import Text.Trifecta.Highlight.Prim
+import Text.Trifecta.Parser.Expr
+import Text.Trifecta.Parser.Token.Style
+
+import Dyna.XXX.Trifecta (identNL, pureSpanned)
+
+data Term = TFunctor {-# UNPACK #-} !B.ByteString ![Spanned Term]
+ | TVar {-# UNPACK #-} !B.ByteString
+ -- | TDBLit XXX
+ deriving (Eq,Ord,Show)
+
+dynaDotOperStyle :: MonadParser m => IdentifierStyle m
+dynaDotOperStyle = IdentifierStyle
+ { styleName = "Dot Operator"
+ , styleStart = () <$ char '.'
+ , styleLetter = () <$ oneOf "!#$%&*+/<=>?@\\^|-~:."
+ , styleReserved = mempty
+ , styleHighlight = Operator
+ , styleReservedHighlight = ReservedOperator
+ }
+
+dynaOperStyle :: MonadParser m => IdentifierStyle m
+dynaOperStyle = IdentifierStyle
+ { styleName = "Operator"
+ , styleStart = () <$ oneOf "!#$%&*+/<=>?@\\^|-~:"
+ , styleLetter = () <$ oneOf "!#$%&*+/<=>?@\\^|-~:."
+ , styleReserved = mempty
+ , styleHighlight = Operator
+ , styleReservedHighlight = ReservedOperator
+ }
+
+dynaAtomStyle :: MonadParser m => IdentifierStyle m
+dynaAtomStyle = IdentifierStyle
+ { styleName = "Atom"
+ , styleStart = () <$ (lower <|> digit <|> char '_')
+ , styleLetter = () <$ (alphaNum <|> oneOf "_'")
+ , styleReserved = H.fromList [ "is", "new", "whenever" ]
+ , styleHighlight = Constant
+ , styleReservedHighlight = ReservedOperator
+ }
+
+dynaVarStyle :: MonadParser m => IdentifierStyle m
+dynaVarStyle = IdentifierStyle
+ { styleName = "Variable"
+ , styleStart = () <$ (upper <|> char '_')
+ , styleLetter = () <$ (alphaNum <|> oneOf "_'")
+ , styleReserved = mempty
+ , styleHighlight = Identifier
+ , styleReservedHighlight = ReservedIdentifier
+ }
+
+dynaCommentStyle :: CommentStyle
+dynaCommentStyle = CommentStyle
+ { commentStart = "{%" -- XXX?
+ , commentEnd = "%}" -- XXX?
+ , commentLine = "%"
+ , commentNesting = True
+ }
+
+dynaLanguage :: (MonadParser m)
+ => LanguageDef m
+dynaLanguage = LanguageDef
+ { languageCommentStyle = dynaCommentStyle
+ , languageIdentifierStyle = undefined -- dynaAtomStyle (XXX)
+ , languageOperatorStyle = undefined -- dynaOperStyle (XXX)
+ }
+
+atom :: MonadParser m => m B.ByteString
+atom = liftA BU.fromString stringLiteral
+ <|> ident dynaAtomStyle
+
+-- sparen :: MonadParser m => m a -> m a
+-- sparen = between (char '(' *> spaces) (spaces <* char ')')
+
+term :: MonadParser m => m (Spanned Term)
+term = lexeme $ choice
+ [ parens texpr
+ , spanned $ TVar <$> (ident dynaVarStyle)
+ , try $ spanned $ flip TFunctor [] <$> atom <* (notFollowedBy $ char '(')
+ , spanned $ parenfunc
+ ]
+ where
+ parenfunc = TFunctor <$> (highlight Identifier atom <?> "Functor")
+ <*> parens (texpr `sepBy` symbolic ',')
+
+-- XXX right now all binops are at equal precedence and left-associative; that's wrong.
+texpr :: MonadParser m => m (Spanned Term)
+texpr = buildExpressionParser etable term <?> "Expression"
+ where
+ etable = [ [ Prefix $ uf (spanned $ symbol "new") ]
+ , [ Prefix $ uf (spanned $ ident dynaOperStyle) ]
+ , [ Infix (bf (spanned $ ident dynaOperStyle)) AssocLeft ]
+ , [ Infix (bf (spanned $ dotOper)) AssocRight ]
+ , [ Infix (bf (spanned $ symbol "is")) AssocNone ]
+ ]
+
+ -- The dot operator is required to have not-a-space following (to avoid
+ -- confusion with the end-of-rule marker, which is taken to be "dot space"
+ -- or "dot eof").
+ dotAny = char '.' <* satisfy (not . isSpace)
+ dotOper = try (lookAhead dotAny *> identNL dynaDotOperStyle)
+
+ uf f = do
+ (x:~spx) <- f
+ pure (\a@(_:~sp) -> (TFunctor x [a]):~(spx <> sp))
+ bf f = do
+ (x:~spx) <- f
+ pure (\a@(_:~spa) b@(_:~spb) -> (TFunctor x [a,b]):~(spa <> spx <> spb))
+
+hriss = highlight ReservedOperator . spanned . symbol
+
+dynafy :: MonadParser m => Language m a -> m a
+dynafy = flip runLanguage dynaLanguage
+
+dterm, dtexpr :: MonadParser m => m (Spanned Term)
+dterm = dynafy term
+dtexpr = dynafy texpr
+
+-- | Rules are not just terms because we want to make it very syntactically
+-- explicit about the head being a term (though that's not an expressivity
+-- concern -- just use the parenthesized texpr case) so that there is no
+-- risk of parsing ambiguity.
+--
+-- XXX The span on Fact is a little silly
+data Rule = Fact (Spanned Term)
+ | Rule !(Spanned Term) !B.ByteString ![Spanned Term] !(Spanned Term)
+ deriving (Eq,Ord,Show)
+
+-- XXX The span on LRule is a little silly
+-- XXX Having one kind of Pragma is probably wrong
+data Line = LRule (Spanned Rule)
+ | LPragma !(Spanned Term)
+ deriving (Eq,Ord,Show)
+
+rulepfx = Rule <$> term
+ <* spaces
+ <*> (ident dynaOperStyle <?> "Aggregator")
+
+rule = choice [(try (liftA flip rulepfx
+ <*> texpr
+ <* hriss "whenever"))
+ <*> (texpr `sepBy1` symbolic ',')
+
+ , (try rulepfx)
+ <*> many (try (texpr <* symbolic ','))
+ <*> texpr
+
+ , Fact <$> term
+ ]
+
+drule = spanned rule
+
+progline :: MonadParser m => m (Spanned Line)
+progline = spanned $ choice [ LRule <$> drule
+ , LPragma <$> (symbol ":-"
+ *> spaces
+ *> texpr)
+ ]
+
+dline :: MonadParser m => m (Spanned Line)
+dline = dynafy (progline <* optional (char '.' <* (spaces <|> eof)))
+
+dlines :: MonadParser m => m [Spanned Line]
+dlines = dynafy (progline `sepEndBy` (char '.' <* spaces))
--- /dev/null
+{-# LANGUAGE TemplateHaskell #-}
+{-# LANGUAGE Rank2Types #-}
+{-# LANGUAGE OverloadedStrings #-}
+
+-- TODO:
+-- Writing these is still too hard, Template Haskell and the REPL
+-- notwithstanding.
+--
+-- Test.Framework.TH appears not to understand comments at the
+-- moment, and parses right through them.
+
+-- XXX Cabal doesn't understand Main-Is in quite the right way
+-- module Dyna.ParserHS.ParserSelftest where
+
+import Control.Applicative ((<*))
+import Data.ByteString (ByteString)
+import Data.Foldable (toList)
+import Data.Monoid (mempty)
+import qualified Data.Sequence as S
+import Data.String
+import Test.Framework.Providers.HUnit
+import Test.Framework.TH
+import Test.HUnit
+import Text.Trifecta
+
+import Dyna.Test.Trifecta
+import Dyna.ParserHS.Parser
+
+
+term :: ByteString -> Spanned Term
+term = unsafeParse dterm
+
+case_basicAtom = e @=? (term "foo")
+ where e = TFunctor "foo" [] :~ Span (Columns 0 0) (Columns 3 3) "foo"
+
+case_basicAtomTWS = e @=? (term "foo ")
+ where e = TFunctor "foo" [] :~ Span (Columns 0 0) (Columns 4 4) "foo "
+
+case_basicFunctor = e @=? (term sfb)
+ where
+ e = TFunctor "foo"
+ [TFunctor "bar" [] :~ Span (Columns 4 4) (Columns 7 7) sfb
+ ]
+ :~ Span (Columns 0 0) (Columns 8 8) sfb
+
+ sfb :: (IsString s) => s
+ sfb = "foo(bar)"
+
+case_nestedFunctorsWithArgs = e @=? (term st)
+ where
+ e = TFunctor "foo"
+ [TFunctor "bar" [] :~ Span (Columns 4 4) (Columns 7 7) st
+ ,TVar "X" :~ Span (Columns 8 8) (Columns 9 9) st
+ ,TFunctor "bif" [] :~ Span (Columns 10 10) (Columns 15 15) st
+ ,TFunctor "baz"
+ [TFunctor "quux" [] :~ Span (Columns 20 20) (Columns 24 24) st
+ ,TVar "Y" :~ Span (Columns 25 25) (Columns 26 26) st
+ ]
+ :~ Span (Columns 16 16) (Columns 27 27) st
+ ]
+ :~ Span (Columns 0 0) (Columns 28 28) st
+
+ st :: (IsString s) => s
+ st = "foo(bar,X,bif(),baz(quux,Y))"
+
+
+case_basicFunctorTWS = e @=? (term sfb)
+ where
+ e = TFunctor "foo"
+ [TFunctor "bar" [] :~ Span (Columns 5 5) (Columns 9 9) sfb
+ ] :~ Span (Columns 0 0) (Columns 10 10) sfb
+
+ sfb :: (IsString s) => s
+ sfb = "foo (bar )"
+
+case_basicFunctorNL = e @=? (term sfb)
+ where
+ e = TFunctor "foo"
+ [TFunctor "bar" [] :~ Span (Lines 1 1 5 1) (Lines 1 5 9 5) "(bar )"
+ ] :~ Span (Columns 0 0) (Lines 1 6 10 6) "foo\n"
+
+ sfb :: (IsString s) => s
+ sfb = "foo\n(bar )"
+
+case_colonFunctor = e @=? (term pvv)
+ where
+ e = TFunctor "possible"
+ [TFunctor ":"
+ [TVar "Var" :~ Span (Columns 9 9) (Columns 12 12) pvv
+ ,TVar "Val" :~ Span (Columns 13 13) (Columns 16 16) pvv
+ ]
+ :~ Span (Columns 9 9) (Columns 16 16) pvv
+ ]
+ :~ Span (Columns 0 0) (Columns 17 17) "possible(Var:Val)"
+ pvv = "possible(Var:Val)"
+
+case_failIncompleteExpr = checkParseFail dterm "foo +"
+ [(Right (Columns 4 4), "expected: \"(\", end of input")]
+
+progline :: ByteString -> Spanned Line
+progline = unsafeParse dline
+
+proglines :: ByteString -> [Spanned Line]
+proglines = unsafeParse dlines
+
+case_ruleSimple = e @=? (progline sr)
+ where
+ e = LRule (Rule (TFunctor "goal" [] :~ Span (Columns 0 0) (Columns 5 5) sr)
+ "+="
+ []
+ (TFunctor "1" [] :~ Span (Columns 8 8) (Columns 10 10) sr)
+ :~ Span (Columns 0 0) (Columns 10 10) sr)
+ :~ Span (Columns 0 0) (Columns 10 10) sr
+ sr = "goal += 1 ."
+
+case_ruleExpr = e @=? (progline sr)
+ where
+ e = LRule (Rule (TFunctor "goal" [] :~ Span (Columns 0 0) (Columns 5 5) sr)
+ "+="
+ []
+ (TFunctor "+"
+ [TFunctor "foo" [] :~ Span (Columns 8 8) (Columns 12 12) sr
+ ,TFunctor "bar" [] :~ Span (Columns 14 14) (Columns 18 18) sr
+ ]
+ :~ Span (Columns 8 8) (Columns 18 18) sr
+ )
+ :~ Span (Columns 0 0) (Columns 18 18) sr)
+ :~ Span (Columns 0 0) (Columns 18 18) sr
+ sr = "goal += foo + bar ."
+
+case_ruleDotExpr = e @=? (progline sr)
+ where
+ e = LRule (Rule (TFunctor "goal" [] :~ Span (Columns 0 0) (Columns 5 5) sr)
+ "+="
+ []
+ (TFunctor "."
+ [TFunctor "foo" [] :~ Span (Columns 8 8) (Columns 11 11) sr
+ ,TFunctor "bar" [] :~ Span (Columns 12 12) (Columns 15 15) sr
+ ]
+ :~ Span (Columns 8 8) (Columns 15 15) sr
+ )
+ :~ Span (Columns 0 0) (Columns 15 15) sr)
+ :~ Span (Columns 0 0) (Columns 15 15) sr
+ sr = "goal += foo.bar."
+
+case_ruleComma = e @=? (progline sr)
+ where
+ e = LRule (Rule (TFunctor "foo" [] :~ Span (Columns 0 0) (Columns 4 4) sr)
+ "+="
+ [TFunctor "bar"
+ [TVar "X" :~ Span (Columns 11 11) (Columns 12 12) sr]
+ :~ Span (Columns 7 7) (Columns 13 13) sr
+ ,TFunctor "baz"
+ [TVar "X" :~ Span (Columns 19 19) (Columns 20 20) sr]
+ :~ Span (Columns 15 15) (Columns 21 21) sr
+ ]
+ (TVar "X" :~ Span (Columns 23 23) (Columns 24 24) sr)
+ :~ Span (Columns 0 0) (Columns 24 24) sr)
+ :~ Span (Columns 0 0) (Columns 24 24) sr
+ sr = "foo += bar(X), baz(X), X."
+
+case_ruleKeywordsComma = e @=? (progline sr)
+ where
+ e = LRule (Rule (TFunctor "foo" [] :~ Span (Columns 0 0) (Columns 4 4) sr)
+ "="
+ [TFunctor "is"
+ [TVar "X" :~ Span (Columns 21 21) (Columns 23 23) sr
+ ,TFunctor "baz"
+ [TVar "Y" :~ Span (Columns 30 30) (Columns 31 31) sr]
+ :~ Span (Columns 26 26) (Columns 32 32) sr
+ ]
+ :~ Span (Columns 21 21) (Columns 32 32) sr
+ ,TFunctor "is"
+ [TVar "Y" :~ Span (Columns 34 34) (Columns 36 36) sr
+ ,TFunctor "3" [] :~ Span (Columns 39 39) (Columns 41 41) sr
+ ]
+ :~ Span (Columns 34 34) (Columns 41 41) sr
+ ]
+ (TFunctor "new"
+ [TVar "X" :~ Span (Columns 10 10) (Columns 12 12) sr]
+ :~ Span (Columns 6 6) (Columns 12 12) sr)
+ :~ Span (Columns 0 0) (Columns 41 41) sr)
+ :~ Span (Columns 0 0) (Columns 41 41) sr
+ sr = "foo = new X whenever X is baz(Y), Y is 3 ."
+
+-- XXX It takes a while to parse this one. Why?
+case_rules = e @=? (proglines sr)
+ where
+ e = [ LRule (Rule (TFunctor "goal" [] :~ Span (Columns 0 0) (Columns 5 5) sr)
+ "+="
+ []
+ (TFunctor "1" [] :~ Span (Columns 8 8) (Columns 9 9) sr)
+ :~ Span (Columns 0 0) (Columns 9 9) sr)
+ :~ Span (Columns 0 0) (Columns 9 9) sr
+ , LRule (Rule (TFunctor "goal" [] :~ Span (Columns 11 11) (Columns 16 16) sr)
+ "+="
+ []
+ (TFunctor "2" [] :~ Span (Columns 19 19) (Columns 20 20) sr)
+ :~ Span (Columns 11 11) (Columns 20 20) sr)
+ :~ Span (Columns 11 11) (Columns 20 20) sr
+ ]
+ sr = "goal += 1. goal += 2."
+
+-- XXX It takes a while to parse this one. Why?
+case_rulesDotExpr = e @=? (proglines sr)
+ where
+ e = [ LRule (Rule (TFunctor "goal" [] :~ Span (Columns 0 0) (Columns 5 5) sr)
+ "+="
+ []
+ (TFunctor "."
+ [TFunctor "foo" [] :~ Span (Columns 8 8) (Columns 11 11) sr
+ ,TFunctor "bar" [] :~ Span (Columns 12 12) (Columns 15 15) sr
+ ]
+ :~ Span (Columns 8 8) (Columns 15 15) sr
+ )
+ :~ Span (Columns 0 0) (Columns 15 15) sr)
+ :~ Span (Columns 0 0) (Columns 15 15) sr
+ , LRule (Rule (TFunctor "goal" [] :~ Span (Columns 17 17) (Columns 22 22) sr)
+ "+="
+ []
+ (TFunctor "1" [] :~ Span (Columns 25 25) (Columns 26 26) sr)
+ :~ Span (Columns 17 17) (Columns 26 26) sr)
+ :~ Span (Columns 17 17) (Columns 26 26) sr
+ ]
+ sr = "goal += foo.bar. goal += 1."
+
+
+main :: IO ()
+main = $(defaultMainGenerator)
+
+{-
+runParser :: (Show a) => (forall r . Language (Parser r String) a) -> B.ByteString -> Result TermDoc a
+runParser p = parseByteString (dynafy p <* eof) M.mempty
+
+testParser :: (Show a) => (forall r . Language (Parser r String) a) -> String -> IO ()
+testParser p = parseTest (dynafy p <* eof)
+
+testDyna :: (Show a) => (forall r . Language (Parser r String) a) -> String -> Result TermDoc a
+testDyna p i = runParser p (BU.fromString i)
+
+cs r e = case r of
+ Success w s | S.null w -> assertEqual "XXX" e s
+ _ -> assertBool "XXX" False
+-}
projects / dyna2 / commitdiff