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|
{
{-# OPTIONS -w -Wwarn #-}
-- The above warning supression flag is a temporary kludge.
-- While working on this module you are encouraged to remove it and fix
-- any warnings in the module. See
-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
-- for details
module Parser (parse) where
import Lexer (lex_tok)
import ParserM (Token(..), ParserM, run_parser, get_pos, show_pos,
happyError)
import Syntax
}
%name parsex
%expect 0
%tokentype { Token }
%monad { ParserM }
%lexer { lex_tok } { TEOF }
%token
'->' { TArrow }
'=' { TEquals }
',' { TComma }
'(' { TOpenParen }
')' { TCloseParen }
'(#' { TOpenParenHash }
'#)' { THashCloseParen }
'{' { TOpenBrace }
'}' { TCloseBrace }
section { TSection }
primop { TPrimop }
pseudoop { TPseudoop }
primtype { TPrimtype }
with { TWith }
defaults { TDefaults }
true { TTrue }
false { TFalse }
dyadic { TDyadic }
monadic { TMonadic }
compare { TCompare }
genprimop { TGenPrimOp }
thats_all_folks { TThatsAllFolks }
lowerName { TLowerName $$ }
upperName { TUpperName $$ }
string { TString $$ }
noBraces { TNoBraces $$ }
%%
info :: { Info }
info : pDefaults pEntries thats_all_folks { Info $1 $2 }
pDefaults :: { [Option] }
pDefaults : defaults pOptions { $2 }
pOptions :: { [Option] }
pOptions : pOption pOptions { $1 : $2 }
| {- empty -} { [] }
pOption :: { Option }
pOption : lowerName '=' false { OptionFalse $1 }
| lowerName '=' true { OptionTrue $1 }
| lowerName '=' pStuffBetweenBraces { OptionString $1 $3 }
pEntries :: { [Entry] }
pEntries : pEntry pEntries { $1 : $2 }
| {- empty -} { [] }
pEntry :: { Entry }
pEntry : pPrimOpSpec { $1 }
| pPrimTypeSpec { $1 }
| pPseudoOpSpec { $1 }
| pSection { $1 }
pPrimOpSpec :: { Entry }
pPrimOpSpec : primop upperName string pCategory pType
pDesc pWithOptions
{ PrimOpSpec {
cons = $2,
name = $3,
cat = $4,
ty = $5,
desc = $6,
opts = $7
}
}
pPrimTypeSpec :: { Entry }
pPrimTypeSpec : primtype pType pDesc pWithOptions
{ PrimTypeSpec { ty = $2, desc = $3, opts = $4 } }
pPseudoOpSpec :: { Entry }
pPseudoOpSpec : pseudoop string pType pDesc pWithOptions
{ PseudoOpSpec { name = $2, ty = $3, desc = $4, opts = $5 } }
pSection :: { Entry }
pSection : section string pDesc { Section { title = $2, desc = $3 } }
pWithOptions :: { [Option] }
pWithOptions : with pOptions { $2 }
| {- empty -} { [] }
pCategory :: { Category }
pCategory : dyadic { Dyadic }
| monadic { Monadic }
| compare { Compare }
| genprimop { GenPrimOp }
pDesc :: { String }
pDesc : pStuffBetweenBraces { $1 }
| {- empty -} { "" }
pStuffBetweenBraces :: { String }
pStuffBetweenBraces : '{' pInsides '}' { $2 }
pInsides :: { String }
pInsides : pInside pInsides { $1 ++ $2 }
| {- empty -} { "" }
pInside :: { String }
pInside : '{' pInsides '}' { "{" ++ $2 ++ "}" }
| noBraces { $1 }
pType :: { Ty }
pType : paT '->' pType { TyF $1 $3 }
| paT { $1 }
-- Atomic types
paT :: { Ty }
paT : pTycon ppTs { TyApp $1 $2 }
| pUnboxedTupleTy { $1 }
| '(' pType ')' { $2 }
| lowerName { TyVar $1 }
pUnboxedTupleTy :: { Ty }
pUnboxedTupleTy : '(#' pCommaTypes '#)' { TyUTup $2 }
pCommaTypes :: { [Ty] }
pCommaTypes : pType ',' pCommaTypes { $1 : $3 }
| pType { [$1] }
ppTs :: { [Ty] }
ppTs : ppT ppTs { $1 : $2 }
| {- empty -} { [] }
-- Primitive types
ppT :: { Ty }
ppT : lowerName { TyVar $1 }
| pTycon { TyApp $1 [] }
pTycon :: { String }
pTycon : upperName { $1 }
| '(' ')' { "()" }
{
parse :: String -> Either String Info
parse = run_parser parsex
}
|
