{- ----------------------------------------------------------------------------- Copyright 2019,2021,2023 Kevin P. Barry Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ----------------------------------------------------------------------------- -} -- Author: Kevin P. Barry [ta0kira@gmail.com] {-# LANGUAGE FlexibleInstances #-} module Parser.TypeCategory ( parseFilters, parseScope, parseScopedFunction, singleDefine, singleFilter, singleRefine, ) where import Base.Positional import Parser.Common import Parser.TextParser import Parser.TypeInstance () import Types.TypeCategory import Types.TypeInstance import Types.Variance instance ParseFromSource (AnyCategory SourceContext) where sourceParser = parseValue <|> parseInstance <|> parseConcrete where open = sepAfter (string_ "{") close = sepAfter (string_ "}") parseValue = labeled "value interface" $ do c <- getSourceContext try $ kwValue >> kwInterface n <- sourceParser ps <- parseCategoryParams open pg <- pragmas rs <- parseCategoryRefines fs <- flip sepBy optionalSpace $ parseScopedFunction (return ValueScope) (return n) close return $ ValueInterface [c] NoNamespace n pg ps rs fs parseInstance = labeled "type interface" $ do c <- getSourceContext try $ kwType >> kwInterface n <- sourceParser ps <- parseCategoryParams open pg <- pragmas fs <- flip sepBy optionalSpace $ parseScopedFunction (return TypeScope) (return n) close return $ InstanceInterface [c] NoNamespace n pg ps fs parseConcrete = labeled "concrete type" $ do c <- getSourceContext kwConcrete n <- sourceParser ps <- parseCategoryParams open pg <- pragmas (rs,ds,vs) <- parseRefinesDefinesFilters (fs,fv) <- parseFunctionsWithVisibility $ parseScopedFunction parseScope (return n) close return $ ValueConcrete [c] NoNamespace n pg fv ps rs ds vs fs pragmas = fmap (:[]) immutable <|> return [] immutable = do c <- getSourceContext kwImmutable return $ CategoryImmutable [c] parseCategoryParams :: TextParser [ValueParam SourceContext] parseCategoryParams = do (con,inv,cov) <- none <|> try fixedOnly <|> try noFixed <|> try explicitFixed return $ map (apply Contravariant) con ++ map (apply Invariant) inv ++ map (apply Covariant) cov where none = do notFollowedBy (string "<") return ([],[],[]) fixedOnly = do -- T inv <- between (sepAfter $ string_ "<") (sepAfter $ string_ ">") (sepBy singleParam (sepAfter $ string_ ",")) return ([],inv,[]) noFixed = do -- T con <- between (sepAfter $ string_ "<") (sepAfter $ string_ "|") (sepBy singleParam (sepAfter $ string_ ",")) cov <- between nullParse (sepAfter $ string_ ">") (sepBy singleParam (sepAfter $ string_ ",")) return (con,[],cov) explicitFixed = do -- T con <- between (sepAfter $ string_ "<") (sepAfter $ string_ "|") (sepBy singleParam (sepAfter $ string_ ",")) inv <- between nullParse (sepAfter $ string_ "|") (sepBy singleParam (sepAfter $ string_ ",")) cov <- between nullParse (sepAfter $ string_ ">") (sepBy singleParam (sepAfter $ string_ ",")) return (con,inv,cov) singleParam = labeled "param declaration" $ do noParamSelf c <- getSourceContext n <- sourceParser return (c,n) apply v (c,n) = ValueParam [c] n v singleRefine :: TextParser (ValueRefine SourceContext) singleRefine = do c <- getSourceContext kwRefines t <- sourceParser return $ ValueRefine [c] t singleDefine :: TextParser (ValueDefine SourceContext) singleDefine = do c <- getSourceContext kwDefines t <- sourceParser return $ ValueDefine [c] t singleFilter :: TextParser (ParamFilter SourceContext) singleFilter = do c <- getSourceContext noParamSelf n <- sourceParser f <- sourceParser return $ ParamFilter [c] n f parseCategoryRefines :: TextParser [ValueRefine SourceContext] parseCategoryRefines = sepAfter $ sepBy singleRefine optionalSpace parseFilters :: TextParser [ParamFilter SourceContext] parseFilters = sepBy singleFilter optionalSpace parseRefinesDefinesFilters :: TextParser ([ValueRefine SourceContext],[ValueDefine SourceContext],[ParamFilter SourceContext]) parseRefinesDefinesFilters = parsed >>= return . merge3 where parsed = sepBy anyType optionalSpace anyType = labeled "refine or define or param filter" $ put13 singleRefine <|> put23 singleDefine <|> put33 singleFilter instance ParseFromSource FunctionName where sourceParser = labeled "function name" $ do noKeywords b <- lowerChar e <- sepAfter $ many alphaNumChar return $ FunctionName (b:e) instance ParseFromSource (CallArgLabel SourceContext) where sourceParser = labeled "arg label" $ do c <- getSourceContext b <- lowerChar e <- many alphaNumChar sepAfter $ char_ ':' return $ CallArgLabel [c] (b:e ++ ":") instance ParseFromSource (FunctionVisibility SourceContext) where sourceParser = labeled "visibility" $ do c <- getSourceContext kwVisibility visDefault <|> visTypes c where visDefault = do kwIgnore return $ FunctionVisibilityDefault visTypes c = do ts <- sepBy1 singleType (sepAfter $ string ",") return $ FunctionVisibility [c] ts singleType = do c <- getSourceContext t <- sourceParser return ([c],t) parseFunctionsWithVisibility :: TextParser (ScopedFunction SourceContext) -> TextParser ([ScopedFunction SourceContext],[FunctionVisibility SourceContext]) parseFunctionsWithVisibility func = labeled "visibility" $ sepBy anyType optionalSpace >>= merge FunctionVisibilityDefault where anyType = fmap Left func <|> fmap Right sourceParser merge v0 (Left f:ps) = do (fs,vs) <- merge v0 ps return (setVis v0 f:fs,vs) merge _ (Right v:ps) = do (fs,vs) <- merge v ps return (fs,v:vs) merge _ _ = return ([],[]) setVis v (ScopedFunction c n t s _ as rs ps fs ms) = (ScopedFunction c n t s v as rs ps fs ms) parseScopedFunction :: TextParser SymbolScope -> TextParser CategoryName -> TextParser (ScopedFunction SourceContext) parseScopedFunction sp tp = labeled "function" $ do c <- getSourceContext (s,t,n) <- try parseName ps <- fmap Positional $ noParams <|> someParams fa <- parseFilters as <- fmap Positional $ typeList "arg label" singleArg sepAfter_ (string "->") rs <- fmap Positional $ typeList "return type" singleReturn return $ ScopedFunction [c] n t s FunctionVisibilityDefault as rs ps fa [] where parseName = do s <- sp -- Could be a constant, i.e., nothing consumed. t <- tp -- Same here. n <- sourceParser return (s,t,n) noParams = notFollowedBy (string "<") >> return [] someParams = between (sepAfter $ string_ "<") (sepAfter $ string_ ">") (sepBy singleParam (sepAfter $ string ",")) singleParam = labeled "param declaration" $ do noParamSelf c <- getSourceContext n <- sourceParser return $ ValueParam [c] n Invariant typeList l parseVal = between (sepAfter $ string_ "(") (sepAfter $ string_ ")") (sepBy (labeled l $ parseVal) (sepAfter $ string ",")) singleArg = do c <- getSourceContext t <- sourceParser optionalSpace n <- fmap Just sourceParser <|> return Nothing return $ (PassedValue [c] t,n) singleReturn = do c <- getSourceContext t <- sourceParser return $ PassedValue [c] t parseScope :: TextParser SymbolScope parseScope = try categoryScope <|> try typeScope <|> valueScope categoryScope :: TextParser SymbolScope categoryScope = kwCategory >> return CategoryScope typeScope :: TextParser SymbolScope typeScope = kwType >> return TypeScope valueScope :: TextParser SymbolScope valueScope = kwValue >> return ValueScope