diff --git a/Grammar.ebnf b/Grammar.ebnf index bff331d..2404a67 100644 --- a/Grammar.ebnf +++ b/Grammar.ebnf @@ -12,7 +12,7 @@ bold ::= '__' text_no_newline '__' monospace ::= '@' text_content '@' link ::= module_link | hyperlink | markdown_link -module_link ::= '"' module_name ( '#' anchor_name )? '"' +module_link ::= '"' module_name ( ('#' | '\#') anchor_name )? '"' hyperlink ::= '<' url ( ' ' link_text )? '>' markdown_link ::= '[' link_text '](' ( url | module_link ) ')' diff --git a/src/Lexer.hs b/src/Lexer.hs index 04fa84f..426a7ff 100644 --- a/src/Lexer.hs +++ b/src/Lexer.hs @@ -10,7 +10,7 @@ import Control.Monad (mfilter, void) import Data.Functor (($>)) import Data.Text (Text, intercalate) import Data.Text qualified as Text -import GHC.Unicode (isAlpha, isAlphaNum, isControl, isPrint, isSpace, isUpper) +import GHC.Unicode (isAlphaNum, isControl, isPrint, isSpace, isUpper) import ParserMonad (Parser, initialParserState) import Text.Parsec import Text.Parsec qualified as Parsec @@ -66,9 +66,6 @@ data Token located :: Parser a -> Parser (SourcePos, a) located p = (,) <$> getPosition <*> p -startPosition :: Parser a -> Parser SourcePos -startPosition = fmap fst . located - tokenise :: [Parser a] -> Parser [(SourcePos, a)] tokenise = sequence . map located @@ -93,8 +90,8 @@ lexText = go , spaceToken , link , labeledLink - , modules - , anchors + , module_ + , anchor , textElement , quotes , birdTrack @@ -152,9 +149,6 @@ delimitedSymmetric s t1 t2 = delimited s s t1 t2 eol :: Parser () eol = void "\n" <|> void "\r\n" <|> Parsec.eof -anchorHash :: Parser Text -anchorHash = "#" <|> try "\\#" - header1 :: Lexer header1 = delimitedNoTrailing "= " eol (Header One) @@ -174,11 +168,10 @@ header6 :: Lexer header6 = delimitedNoTrailing "====== " eol (Header Six) -- #anchors# -anchors :: Lexer -anchors = - tokenise - [ between anchorHash anchorHash (Anchor <$> anyUntil anchorHash) - ] +anchor :: Lexer +anchor = do + x <- located $ between "#" "#" (Anchor <$> anyUntil "#") + pure [x] moduleNames :: Parser Text @@ -192,16 +185,19 @@ identifierChar = satisfy (\c -> isAlphaNum c || c == '_') -- "Module.Name" -- "Module.Name#anchor" --- "Module.Name\#anchor" -- this has been deprecated for 9 years, thanks Ben -modules :: Lexer -modules = between (char '"') (char '"') inner +-- "Module.Name\#anchor" -- known as "old anchor". this has been deprecated for 9 years, thanks Ben +module_ :: Lexer +module_ = between (char '"') (char '"') inner where inner = do - module_ <- located $ Module <$> moduleNames + m <- located $ Module <$> moduleNames mAnchor <- optionMaybe (located $ anchorHash *> (Anchor <$> anchorText)) pure $ case mAnchor of - Just anchor -> [module_, anchor] - Nothing -> [module_] + Just anc -> [m, anc] + Nothing -> [m] + + anchorHash :: Parser Text + anchorHash = "#" <|> try "\\#" anchorText :: Parser Text anchorText = Text.pack <$> many (satisfy (\c -> c /= '"' && not (isSpace c))) @@ -227,20 +223,12 @@ link = do labeledLink :: Lexer labeledLink = do - pos <- getPosition - void $ string "<" - link' <- linkRaw - pos7 <- getPosition - label' <- anyUntil $ string ">" - pos8 <- getPosition - void $ ">" - + open <- located $ LabeledLinkOpen <$ "<" + linkRes <- linkRaw + labelRes <- located $ Token <$> anyUntil ">" + close <- located $ LabeledLinkClose <$ ">" pure $ - (pos, LabeledLinkOpen) - : link' - <> [ (pos7, Token label') - , (pos8, LabeledLinkClose) - ] + open : linkRes <> [ labelRes , close ] mathMultiline :: Lexer mathMultiline = delimited "\\[" "\\]" MathMultilineOpen MathMultilineClose diff --git a/test/Spec.hs b/test/Spec.hs index 7ddbcff..745aefa 100644 --- a/test/Spec.hs +++ b/test/Spec.hs @@ -19,8 +19,8 @@ main = hspec $ do describe "minimal" do it "handles unicode" unicode it "escapes" escaping - it "maths" maths - it "anchors" anchors + it "maths" math + it "anchors" anchor it "space chars" space it "bare string" someString it "emphasis" emphatic @@ -84,14 +84,14 @@ labeledLink = , (1, 35, LabeledLinkClose) ] -anchors :: Expectation -anchors = +anchor :: Expectation +anchor = "#myAnchor#" `shouldLexTo` [ (1, 1, Anchor "myAnchor") ] -maths :: IO () -maths = do +math :: IO () +math = do "\\[some math\\]" `shouldLexTo` [ (1, 1, MathMultilineOpen) , (1, 3, Token "some math")