256 lines
7.9 KiB
Haskell
256 lines
7.9 KiB
Haskell
module RainParse where
|
|
|
|
import qualified Text.ParserCombinators.Parsec.Token as P
|
|
|
|
|
|
|
|
|
|
|
|
--Chuck a whole load from Parse:
|
|
import Control.Monad (liftM, when)
|
|
import Control.Monad.Error (runErrorT)
|
|
import Control.Monad.State (MonadState, StateT, execStateT, liftIO, modify, get, put)
|
|
import Data.List
|
|
import qualified Data.Map as Map
|
|
import Data.Maybe
|
|
import Debug.Trace
|
|
import qualified IO
|
|
import Numeric (readHex)
|
|
import Text.ParserCombinators.Parsec
|
|
import Text.ParserCombinators.Parsec.Language (emptyDef)
|
|
import Text.Regex
|
|
|
|
import qualified AST as A
|
|
import CompState
|
|
import Errors
|
|
import EvalConstants
|
|
import EvalLiterals
|
|
import Indentation
|
|
import Intrinsics
|
|
import Metadata
|
|
import Pass
|
|
import Types
|
|
import Utils
|
|
import qualified Parse
|
|
|
|
|
|
|
|
type RainState = CompState
|
|
type RainParser = Parse.OccParser
|
|
|
|
rainStyle
|
|
= emptyDef
|
|
{ P.commentLine = "#"
|
|
, P.nestedComments = False
|
|
, P.identStart = letter <|> char '_'
|
|
, P.identLetter = alphaNum <|> char '_'
|
|
, P.opStart = oneOf ":+-*/>=<!"
|
|
, P.opLetter = oneOf "+-="
|
|
, P.reservedOpNames= [
|
|
"+",
|
|
"-",
|
|
"*",
|
|
"/",
|
|
"==",
|
|
"<",
|
|
">",
|
|
">=",
|
|
"<=",
|
|
"!=",
|
|
"-",
|
|
":"
|
|
]
|
|
, P.reservedNames = [
|
|
"par",
|
|
"seq",
|
|
"alt",
|
|
"seqeach",
|
|
"pareach",
|
|
"channel",
|
|
"one2one",
|
|
"int",
|
|
"if",
|
|
"while",
|
|
"process",
|
|
"bool"
|
|
{-
|
|
"tuple",
|
|
"sleep",
|
|
"for",
|
|
"until",
|
|
"poison",
|
|
"return",
|
|
"function",
|
|
"typedef",
|
|
"sint8","sint16","sint32","sint64"
|
|
"uint8","uint16","uint32","uint64"
|
|
"shared",
|
|
"template",
|
|
"constant",
|
|
"namespace"
|
|
-}
|
|
]
|
|
, P.caseSensitive = True
|
|
}
|
|
|
|
lexer :: P.TokenParser RainState
|
|
lexer = P.makeTokenParser rainStyle
|
|
|
|
whiteSpace = P.whiteSpace lexer
|
|
lexeme = P.lexeme lexer
|
|
symbol = P.symbol lexer
|
|
natural = P.natural lexer
|
|
parens = P.parens lexer
|
|
semi = P.semi lexer
|
|
identifier = P.identifier lexer
|
|
reserved = P.reserved lexer
|
|
reservedOp = P.reservedOp lexer
|
|
|
|
--{{{ Symbols
|
|
sLeftQ = try $ symbol "["
|
|
sRightQ = try $ symbol "]"
|
|
sLeftR = try $ symbol "("
|
|
sRightR = try $ symbol ")"
|
|
sLeftC = try $ symbol "{"
|
|
sRightC = try $ symbol "}"
|
|
sEquality = try $ symbol "=="
|
|
sSemiColon = try $ symbol ";"
|
|
sColon = try $ symbol ":"
|
|
sQuote = try $ symbol "\""
|
|
--}}}
|
|
|
|
--{{{ Keywords
|
|
|
|
sPar = reserved "par"
|
|
sSeq = reserved "seq"
|
|
sAlt = reserved "alt"
|
|
sSeqeach = reserved "seqeach"
|
|
sPareach = reserved "pareach"
|
|
sChannel = reserved "channel"
|
|
sOne2One = reserved "one2one"
|
|
sBool = reserved "bool"
|
|
sInt = reserved "int"
|
|
sIf = reserved "if"
|
|
sElse = reserved "else"
|
|
sWhile = reserved "while"
|
|
sProcess = reserved "process"
|
|
--}}}
|
|
|
|
--{{{Ideas nicked from GenerateC:
|
|
md :: RainParser Meta
|
|
md
|
|
= do pos <- getPosition
|
|
return Meta {
|
|
metaFile = Just $ sourceName pos,
|
|
metaLine = sourceLine pos,
|
|
metaColumn = sourceColumn pos
|
|
}
|
|
|
|
name :: RainParser A.Name
|
|
name
|
|
= do m <- md
|
|
s <- identifier
|
|
return $ A.Name m (A.VariableName) s --A.VariableName is a placeholder until a later pass
|
|
<?> "name"
|
|
|
|
--}}}
|
|
|
|
dataType :: RainParser A.Type
|
|
dataType
|
|
= do {sBool ; return A.Bool}
|
|
<|> do {sInt ; return A.Int64}
|
|
<|> do {sChannel ; inner <- dataType ; return $ A.Chan inner}
|
|
<?> "data type"
|
|
|
|
variableId :: RainParser A.Variable
|
|
variableId = do {m <- md ; v <- name ; return $ A.Variable m v}
|
|
<?> "variable name"
|
|
|
|
stringLiteral :: RainParser (A.LiteralRepr, A.Dimension)
|
|
stringLiteral
|
|
= do m <- md
|
|
char '"'
|
|
cs <- manyTill literalCharacter sQuote
|
|
let aes = [A.ArrayElemExpr $ A.Literal m A.Byte c | c <- cs]
|
|
return (A.ArrayLiteral m aes, A.Dimension $ length cs)
|
|
<?> "string literal"
|
|
|
|
literalCharacter :: RainParser A.LiteralRepr
|
|
literalCharacter
|
|
= do m <- md
|
|
c <- anyChar
|
|
return $ A.ByteLiteral m [c]
|
|
|
|
digits :: RainParser String
|
|
digits
|
|
= many1 digit
|
|
<?> "decimal digits"
|
|
|
|
integer :: RainParser A.LiteralRepr
|
|
integer
|
|
= do m <- md
|
|
d <- lexeme digits
|
|
return $ A.IntLiteral m d
|
|
|
|
literal :: RainParser A.Expression
|
|
literal = do {m <- md ; (lr, dim) <- stringLiteral ; return $ A.Literal m (A.Array [dim] A.Byte) lr }
|
|
<|> do {m <- md ; i <- integer ; return $ A.Literal m A.Int i}
|
|
<?> "literal"
|
|
|
|
expression :: RainParser A.Expression
|
|
expression
|
|
= do {m <- md ; lhs <- subExpression ;
|
|
do {sEquality ; rhs <- expression ; return $ A.Dyadic m A.Eq lhs rhs}
|
|
<|> do {return lhs}
|
|
}
|
|
<?> "expression"
|
|
|
|
subExpression :: RainParser A.Expression
|
|
subExpression
|
|
= do {m <- md ; id <- variableId ; return $ A.ExprVariable m id}
|
|
<|> literal
|
|
<?> "[sub-]expression"
|
|
|
|
block :: RainParser A.Structured
|
|
block = do {m <- md ; sLeftC ; procs <- (many statement) ; sts <- sequence (map wrapProc procs) ; sRightC ; return $ A.Several m sts}
|
|
where
|
|
wrapProc :: A.Process -> RainParser A.Structured
|
|
wrapProc x = return (A.OnlyP emptyMeta x)
|
|
|
|
optionalSeq :: RainParser ()
|
|
optionalSeq = option () sSeq
|
|
|
|
assignOp :: RainParser (Meta, Maybe A.DyadicOp)
|
|
--consume an optional operator, then an equals sign (so we can handle = += /= etc) This should not handle !=, nor crazy things like ===, <== (nor <=)
|
|
assignOp
|
|
= do {m <- md; reservedOp "+=" ; return (m,Just A.Plus)}
|
|
<|> do {m <- md; reservedOp "-=" ; return (m,Just A.Minus)}
|
|
<|> do {m <- md; reservedOp "=" ; return (m,Nothing)}
|
|
--TODO the rest
|
|
|
|
lvalue :: RainParser A.Variable
|
|
--For now, only handle plain variables:
|
|
lvalue = variableId
|
|
|
|
statement :: RainParser A.Process
|
|
statement
|
|
= do { m <- md ; sWhile ; sLeftR ; exp <- expression ; sRightR ; st <- statement ; return $ A.While m exp st}
|
|
<|> do { m <- md ; sIf ; sLeftR ; exp <- expression ; sRightR ; st <- statement ;
|
|
option (A.If m $ A.Several m [A.OnlyC m (A.Choice m exp st), A.OnlyC m (A.Choice m (A.True m) (A.Skip m))])
|
|
(do {sElse ; elSt <- statement ; return (A.If m $ A.Several m [A.OnlyC m (A.Choice m exp st), A.OnlyC m (A.Choice m (A.True m) elSt)])})
|
|
}
|
|
<|> do { m <- md ; optionalSeq ; b <- block ; return $ A.Seq m b}
|
|
<|> do { m <- md ; sPar ; b <- block ; return $ A.Par m A.PlainPar b}
|
|
<|> do { m <- md ; sPareach ; sLeftR ; n <- name ; sColon ; exp <- expression ; sRightR ; st <- statement ;
|
|
return $ A.Par m A.PlainPar $ A.Rep m (A.ForEach m n exp) $ A.OnlyP m st }
|
|
<|> do { m <- md ; sSeqeach ; sLeftR ; n <- name ; sColon ; exp <- expression ; sRightR ; st <- statement ;
|
|
return $ A.Seq m $ A.Rep m (A.ForEach m n exp) $ A.OnlyP m st }
|
|
<|> do { m <- md ; lv <- lvalue ; op <- assignOp ; exp <- expression ; sSemiColon ;
|
|
case op of
|
|
(m', Just dyOp) -> return (A.Assign m' [lv] (A.ExpressionList m' [(A.Dyadic m' dyOp (A.ExprVariable m lv) exp)]))
|
|
(m', Nothing) -> return (A.Assign m' [lv] (A.ExpressionList m [exp]))
|
|
}
|
|
<|> do { m <- md ; sSemiColon ; return $ A.Skip m}
|
|
<?> "statement"
|
|
--TODO the "each" statements
|