Grammar.hs

-- Note: this is an automatically generated file. Do not edit.

-- | Term decoders for hydra.grammar

module Hydra.Decode.Grammar where

import qualified Hydra.Core as Core
import qualified Hydra.Extract.Helpers as Helpers
import qualified Hydra.Grammar as Grammar
import qualified Hydra.Graph as Graph
import qualified Hydra.Lexical as Lexical
import qualified Hydra.Lib.Eithers as Eithers
import qualified Hydra.Lib.Maps as Maps
import qualified Hydra.Lib.Maybes as Maybes
import qualified Hydra.Lib.Strings as Strings
import qualified Hydra.Util as Util
import Prelude hiding  (Enum, Ordering, decodeFloat, encodeFloat, fail, map, pure, sum)
import qualified Data.ByteString as B
import qualified Data.Int as I
import qualified Data.List as L
import qualified Data.Map as M
import qualified Data.Set as S

constant :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Constant)
constant cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermWrap v1 -> (Eithers.map (\b -> Grammar.Constant b) ((\raw -> Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
    Core.TermLiteral v2 -> ((\x -> case x of
      Core.LiteralString v3 -> (Right v3)
      _ -> (Left (Util.DecodingError "expected string literal"))) v2)
    _ -> (Left (Util.DecodingError "expected literal"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw)) (Core.wrappedTermBody v1)))
  _ -> (Left (Util.DecodingError "expected wrapped type hydra.grammar.Constant"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

grammar :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Grammar)
grammar cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermWrap v1 -> (Eithers.map (\b -> Grammar.Grammar b) (Helpers.decodeList production cx (Core.wrappedTermBody v1)))
  _ -> (Left (Util.DecodingError "expected wrapped type hydra.grammar.Grammar"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

label :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Label)
label cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermWrap v1 -> (Eithers.map (\b -> Grammar.Label b) ((\raw -> Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
    Core.TermLiteral v2 -> ((\x -> case x of
      Core.LiteralString v3 -> (Right v3)
      _ -> (Left (Util.DecodingError "expected string literal"))) v2)
    _ -> (Left (Util.DecodingError "expected literal"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw)) (Core.wrappedTermBody v1)))
  _ -> (Left (Util.DecodingError "expected wrapped type hydra.grammar.Label"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

labeledPattern :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.LabeledPattern)
labeledPattern cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermRecord v1 ->  
    let fieldMap = (Helpers.toFieldMap v1)
    in (Eithers.bind (Helpers.requireField "label" label fieldMap cx) (\field_label -> Eithers.bind (Helpers.requireField "pattern" pattern fieldMap cx) (\field_pattern -> Right (Grammar.LabeledPattern {
      Grammar.labeledPatternLabel = field_label,
      Grammar.labeledPatternPattern = field_pattern}))))
  _ -> (Left (Util.DecodingError "expected record of type hydra.grammar.LabeledPattern"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

pattern :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Pattern)
pattern cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermUnion v1 ->  
    let tname = (Core.injectionTypeName v1) 
        field = (Core.injectionField v1)
        fname = (Core.fieldName field)
        fterm = (Core.fieldTerm field)
        variantMap = (Maps.fromList [
                (Core.Name "alternatives", (\input -> Eithers.map (\t -> Grammar.PatternAlternatives t) (Helpers.decodeList pattern cx input))),
                (Core.Name "constant", (\input -> Eithers.map (\t -> Grammar.PatternConstant t) (constant cx input))),
                (Core.Name "ignored", (\input -> Eithers.map (\t -> Grammar.PatternIgnored t) (pattern cx input))),
                (Core.Name "labeled", (\input -> Eithers.map (\t -> Grammar.PatternLabeled t) (labeledPattern cx input))),
                (Core.Name "nil", (\input -> Eithers.map (\t -> Grammar.PatternNil) (Helpers.decodeUnit cx input))),
                (Core.Name "nonterminal", (\input -> Eithers.map (\t -> Grammar.PatternNonterminal t) (symbol cx input))),
                (Core.Name "option", (\input -> Eithers.map (\t -> Grammar.PatternOption t) (pattern cx input))),
                (Core.Name "plus", (\input -> Eithers.map (\t -> Grammar.PatternPlus t) (pattern cx input))),
                (Core.Name "regex", (\input -> Eithers.map (\t -> Grammar.PatternRegex t) (regex cx input))),
                (Core.Name "sequence", (\input -> Eithers.map (\t -> Grammar.PatternSequence t) (Helpers.decodeList pattern cx input))),
                (Core.Name "star", (\input -> Eithers.map (\t -> Grammar.PatternStar t) (pattern cx input)))])
    in (Maybes.maybe (Left (Util.DecodingError (Strings.cat [
      "no such field ",
      (Core.unName fname),
      " in union type ",
      (Core.unName tname)]))) (\f -> f fterm) (Maps.lookup fname variantMap))
  _ -> (Left (Util.DecodingError "expected union of type hydra.grammar.Pattern"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

production :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Production)
production cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermRecord v1 ->  
    let fieldMap = (Helpers.toFieldMap v1)
    in (Eithers.bind (Helpers.requireField "symbol" symbol fieldMap cx) (\field_symbol -> Eithers.bind (Helpers.requireField "pattern" pattern fieldMap cx) (\field_pattern -> Right (Grammar.Production {
      Grammar.productionSymbol = field_symbol,
      Grammar.productionPattern = field_pattern}))))
  _ -> (Left (Util.DecodingError "expected record of type hydra.grammar.Production"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

regex :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Regex)
regex cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermWrap v1 -> (Eithers.map (\b -> Grammar.Regex b) ((\raw -> Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
    Core.TermLiteral v2 -> ((\x -> case x of
      Core.LiteralString v3 -> (Right v3)
      _ -> (Left (Util.DecodingError "expected string literal"))) v2)
    _ -> (Left (Util.DecodingError "expected literal"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw)) (Core.wrappedTermBody v1)))
  _ -> (Left (Util.DecodingError "expected wrapped type hydra.grammar.Regex"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))

symbol :: (Graph.Graph -> Core.Term -> Either Util.DecodingError Grammar.Symbol)
symbol cx raw = (Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
  Core.TermWrap v1 -> (Eithers.map (\b -> Grammar.Symbol b) ((\raw -> Eithers.either (\err -> Left (Util.DecodingError err)) (\stripped -> (\x -> case x of
    Core.TermLiteral v2 -> ((\x -> case x of
      Core.LiteralString v3 -> (Right v3)
      _ -> (Left (Util.DecodingError "expected string literal"))) v2)
    _ -> (Left (Util.DecodingError "expected literal"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw)) (Core.wrappedTermBody v1)))
  _ -> (Left (Util.DecodingError "expected wrapped type hydra.grammar.Symbol"))) stripped) (Lexical.stripAndDereferenceTermEither cx raw))