From 34d9f21c6ab529e415f38a5a886b1b612bcbd3bc Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Sun, 10 Mar 2019 00:13:32 +0100
Subject: Initial

---
 src/Haskell/Parser/Def.hs | 100 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)
 create mode 100644 src/Haskell/Parser/Def.hs

(limited to 'src/Haskell/Parser')

diff --git a/src/Haskell/Parser/Def.hs b/src/Haskell/Parser/Def.hs
new file mode 100644
index 0000000..812140c
--- /dev/null
+++ b/src/Haskell/Parser/Def.hs
@@ -0,0 +1,100 @@
+{-# OPTIONS_GHC -Wno-missing-signatures #-}
+module Haskell.Parser.Def where
+
+import Control.Monad.Identity
+import Data.Char
+import Text.Parsec
+-- import qualified Text.Parsec.Language as L
+import qualified Text.Parsec.Token as T
+import qualified Text.Parsec.IndentParsec.Token as IT
+import qualified Text.Parsec.IndentParsec.Prim as IP
+
+
+-- LanguageDef things shamelessly stolen from Text.Parsec.Language.
+-- Reason for stealing is that these have more generic types.
+haskellStyle = T.LanguageDef
+                { T.commentStart   = "{-"
+                , T.commentEnd     = "-}"
+                , T.commentLine    = "--"
+                , T.nestedComments = True
+                , T.identStart     = letter
+                , T.identLetter    = alphaNum <|> oneOf "_'"
+                , T.opStart        = T.opLetter haskellStyle
+                , T.opLetter       = oneOf ":!#$%&*+./<=>?@\\^|-~"
+                , T.reservedOpNames= []
+                , T.reservedNames  = []
+                , T.caseSensitive  = True
+                }
+
+haskell :: T.GenTokenParser String () (IP.IndentT IP.HaskellLike Identity)
+haskell      = T.makeTokenParser haskellDef
+
+haskellDef   = haskell98Def
+                { T.identLetter    = T.identLetter haskell98Def <|> char '#'
+                , T.reservedNames  = T.reservedNames haskell98Def ++
+                                   ["foreign","import","export","primitive"
+                                   ,"_ccall_","_casm_"
+                                   ,"forall"
+                                   ]
+                }
+
+haskell98Def = haskellStyle
+                { T.reservedOpNames= ["::","..","=","\\","|","<-","->","@","~","=>"]
+                , T.reservedNames  = ["let","in","case","of","if","then","else",
+                                    "data","type",
+                                    "class","default","deriving","do","import",
+                                    "infix","infixl","infixr","instance","module",
+                                    "newtype","where",
+                                    "primitive"
+                                    -- "as","qualified","hiding"
+                                   ]
+                }
+
+-- Bring the right combinators in scope.
+mySemiSep = IT.semiSepOrFoldedLines haskell
+myBraces = IT.bracesBlock haskell
+identifier = IT.identifier haskell
+operator = IT.operator haskell
+reserved = IT.reserved haskell
+reservedOp = IT.reservedOp haskell
+charLiteral = IT.charLiteral haskell
+stringLiteral = IT.stringLiteral haskell
+natural = IT.natural haskell
+integer = IT.integer haskell
+float = IT.float haskell
+naturalOrFloat = IT.naturalOrFloat haskell
+decimal = IT.decimal haskell
+hexadecimal = IT.hexadecimal haskell
+octal = IT.octal haskell
+symbol = IT.symbol haskell
+lexeme = IT.lexeme haskell
+whiteSpace = IT.whiteSpace haskell
+semi = IT.semi haskell
+comma = IT.comma haskell
+colon = IT.colon haskell
+dot = IT.dot haskell
+parens = IT.parens haskell
+parensBlock = IT.parensBlock haskell
+braces = IT.braces haskell
+bracesBlock = IT.bracesBlock haskell
+angles = IT.angles haskell
+anglesBlock = IT.anglesBlock haskell
+brackets = IT.brackets haskell
+bracketsBlock = IT.bracketsBlock haskell
+semiSep = IT.semiSep haskell
+semiSepOrFoldedLines = IT.semiSepOrFoldedLines haskell
+semiSep1 = IT.semiSep1 haskell
+semiSepOrFoldedLines1 = IT.semiSepOrFoldedLines1 haskell
+commaSep = IT.commaSep haskell
+commaSepOrFoldedLines = IT.commaSepOrFoldedLines haskell
+commaSep1 = IT.commaSep1 haskell
+commaSepOrFoldedLines1 = IT.commaSepOrFoldedLines1 haskell
+
+-- Some more specific combinators.
+identifierGuard pr = try $ do
+    s <- identifier
+    guard (not (null s) && pr s)
+    return s
+
+typeident = identifierGuard (isUpper . head)
+varident = identifierGuard (isLower . head)
-- 
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