diff options
Diffstat (limited to 'src/compiler/GF/Grammar/Canonical.hs')
| -rw-r--r-- | src/compiler/GF/Grammar/Canonical.hs | 83 |
1 files changed, 59 insertions, 24 deletions
diff --git a/src/compiler/GF/Grammar/Canonical.hs b/src/compiler/GF/Grammar/Canonical.hs index 0da72d634..ed4f3fc9e 100644 --- a/src/compiler/GF/Grammar/Canonical.hs +++ b/src/compiler/GF/Grammar/Canonical.hs @@ -1,7 +1,13 @@ --- | Abstract syntax for canonical GF grammars, i.e. what's left after +-- | +-- Module : GF.Grammar.Canonical +-- Stability : provisional +-- +-- Abstract syntax for canonical GF grammars, i.e. what's left after -- high-level constructions such as functors and opers have been eliminated -- by partial evaluation. This is intended as a common intermediate -- representation to simplify export to other formats. + +{-# LANGUAGE DeriveTraversable #-} module GF.Grammar.Canonical where import Prelude hiding ((<>)) import GF.Text.Pretty @@ -51,13 +57,11 @@ newtype ParamType = ParamTypeId ParamId deriving (Eq,Ord,Show) -- | Linearization value, RHS of @lin@ data LinValue = ConcatValue LinValue LinValue + | LiteralValue LinLiteral | ErrorValue String - | FloatConstant Float - | IntConstant Int | ParamConstant ParamValue | PredefValue PredefId | RecordValue [RecordRowValue] - | StrConstant String | TableValue LinType [TableRowValue] --- | VTableValue LinType [LinValue] | TupleValue [LinValue] @@ -66,10 +70,17 @@ data LinValue = ConcatValue LinValue LinValue | PreValue [([String], LinValue)] LinValue | Projection LinValue LabelId | Selection LinValue LinValue - deriving (Eq,Ord,Show) + | CommentedValue String LinValue + deriving (Eq,Ord,Show) + +data LinLiteral = FloatConstant Float + | IntConstant Int + | StrConstant String + deriving (Eq,Ord,Show) data LinPattern = ParamPattern ParamPattern | RecordPattern [RecordRow LinPattern] + | TuplePattern [LinPattern] | WildPattern deriving (Eq,Ord,Show) @@ -77,37 +88,47 @@ type ParamValue = Param LinValue type ParamPattern = Param LinPattern type ParamValueDef = Param ParamId -data Param arg = Param ParamId [arg] deriving (Eq,Ord,Show) +data Param arg = Param ParamId [arg] + deriving (Eq,Ord,Show,Functor,Foldable,Traversable) -type RecordRowType = RecordRow LinType +type RecordRowType = RecordRow LinType type RecordRowValue = RecordRow LinValue +type TableRowValue = TableRow LinValue -data RecordRow rhs = RecordRow LabelId rhs deriving (Eq,Ord,Show) -data TableRowValue = TableRowValue LinPattern LinValue deriving (Eq,Ord,Show) +data RecordRow rhs = RecordRow LabelId rhs + deriving (Eq,Ord,Show,Functor,Foldable,Traversable) +data TableRow rhs = TableRow LinPattern rhs + deriving (Eq,Ord,Show,Functor,Foldable,Traversable) -- *** Identifiers in Concrete Syntax -newtype PredefId = PredefId String deriving (Eq,Ord,Show) -newtype LabelId = LabelId String deriving (Eq,Ord,Show) -data VarValueId = VarValueId String deriving (Eq,Ord,Show) +newtype PredefId = PredefId Id deriving (Eq,Ord,Show) +newtype LabelId = LabelId Id deriving (Eq,Ord,Show) +data VarValueId = VarValueId QualId deriving (Eq,Ord,Show) -- | Name of param type or param value -newtype ParamId = ParamId String deriving (Eq,Ord,Show) +newtype ParamId = ParamId QualId deriving (Eq,Ord,Show) -------------------------------------------------------------------------------- -- ** Used in both Abstract and Concrete Syntax -newtype ModId = ModId String deriving (Eq,Show) +newtype ModId = ModId Id deriving (Eq,Ord,Show) -newtype CatId = CatId String deriving (Eq,Ord,Show) -newtype FunId = FunId String deriving (Eq,Show) +newtype CatId = CatId Id deriving (Eq,Ord,Show) +newtype FunId = FunId Id deriving (Eq,Show) -data VarId = Anonymous | VarId String deriving Show +data VarId = Anonymous | VarId Id deriving Show newtype Flags = Flags [(FlagName,FlagValue)] deriving Show -type FlagName = String +type FlagName = Id data FlagValue = Str String | Int Int | Flt Double deriving Show + +-- *** Identifiers + +type Id = String +data QualId = Qual ModId Id | Unqual Id deriving (Eq,Ord,Show) + -------------------------------------------------------------------------------- -- ** Pretty printing @@ -199,12 +220,12 @@ instance Pretty LinValue where Projection lv l -> ppA lv<>"."<>l Selection tv pv -> ppA tv<>"!"<>ppA pv VariantValue vs -> "variants"<+>block vs + CommentedValue s v -> "{-" <+> s <+> "-}" $$ v _ -> ppA lv instance PPA LinValue where ppA lv = case lv of - FloatConstant f -> pp f - IntConstant n -> pp n + LiteralValue l -> ppA l ParamConstant pv -> ppA pv PredefValue p -> ppA p RecordValue [] -> pp "<>" @@ -214,13 +235,20 @@ instance PPA LinValue where where alt (ss,lv) = hang (hcat (punctuate "|" (map doubleQuotes ss))) 2 ("=>"<+>lv) - StrConstant s -> doubleQuotes s -- hmm TableValue _ tvs -> "table"<+>block tvs -- VTableValue t ts -> "table"<+>t<+>brackets (semiSep ts) TupleValue lvs -> "<"<>punctuate "," lvs<>">" VarValue v -> pp v _ -> parens lv +instance Pretty LinLiteral where pp = ppA + +instance PPA LinLiteral where + ppA l = case l of + FloatConstant f -> pp f + IntConstant n -> pp n + StrConstant s -> doubleQuotes s -- hmm + instance RhsSeparator LinValue where rhsSep _ = pp "=" instance Pretty LinPattern where @@ -233,6 +261,7 @@ instance PPA LinPattern where ppA p = case p of RecordPattern r -> block r + TuplePattern ps -> "<"<>punctuate "," ps<>">" WildPattern -> pp "_" _ -> parens p @@ -241,8 +270,8 @@ instance RhsSeparator LinPattern where rhsSep _ = pp "=" instance RhsSeparator rhs => Pretty (RecordRow rhs) where pp (RecordRow l v) = hang (l<+>rhsSep v) 2 v -instance Pretty TableRowValue where - pp (TableRowValue l v) = hang (l<+>"=>") 2 v +instance Pretty rhs => Pretty (TableRow rhs) where + pp (TableRow l v) = hang (l<+>"=>") 2 v -------------------------------------------------------------------------------- instance Pretty ModId where pp (ModId s) = pp s @@ -250,11 +279,17 @@ instance Pretty CatId where pp (CatId s) = pp s instance Pretty FunId where pp (FunId s) = pp s instance Pretty LabelId where pp (LabelId s) = pp s instance Pretty PredefId where pp = ppA -instance PPA PredefId where ppA (PredefId s) = pp s +instance PPA PredefId where ppA (PredefId s) = "Predef."<>s instance Pretty ParamId where pp = ppA instance PPA ParamId where ppA (ParamId s) = pp s instance Pretty VarValueId where pp (VarValueId s) = pp s +instance Pretty QualId where pp = ppA + +instance PPA QualId where + ppA (Qual m n) = m<>"_"<>n -- hmm + ppA (Unqual n) = pp n + instance Pretty Flags where pp (Flags []) = empty pp (Flags flags) = "flags" <+> vcat (map ppFlag flags) |