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da3634c59a
This change moves the languages out of IO. I believe this to be correct (as they should be referentially transparent) but we may wish to review that carefully.
105 lines
4.9 KiB
Haskell
105 lines
4.9 KiB
Haskell
module TreeSitter where
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import Diff
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import Parser
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import Range
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import Syntax
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import Term
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import Control.Comonad.Cofree
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import qualified Data.Map as Map
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import Data.Set
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import Foreign
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import Foreign.C
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import Foreign.C.Types
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data TSLanguage = TsLanguage deriving (Show, Eq)
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foreign import ccall "prototype/doubt-difftool/doubt-difftool-Bridging-Header.h ts_language_c" ts_language_c :: Ptr TSLanguage
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foreign import ccall "prototype/doubt-difftool/doubt-difftool-Bridging-Header.h ts_language_javascript" ts_language_javascript :: Ptr TSLanguage
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data TSDocument = TsDocument deriving (Show, Eq)
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_make" ts_document_make :: IO (Ptr TSDocument)
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_set_language" ts_document_set_language :: Ptr TSDocument -> Ptr TSLanguage -> IO ()
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_set_input_string" ts_document_set_input_string :: Ptr TSDocument -> CString -> IO ()
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_parse" ts_document_parse :: Ptr TSDocument -> IO ()
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foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_free" ts_document_free :: Ptr TSDocument -> IO ()
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data TSLength = TsLength { bytes :: CSize, chars :: CSize }
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deriving (Show, Eq)
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data TSNode = TsNode { _data :: Ptr (), offset :: TSLength }
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deriving (Show, Eq)
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instance Storable TSNode where
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alignment n = 24
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sizeOf n = 24
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peek p = error "Haskell code should never read TSNode values directly."
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poke p n = error "Haskell code should never write TSNode values directly."
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foreign import ccall "app/bridge.h ts_document_root_node_p" ts_document_root_node_p :: Ptr TSDocument -> Ptr TSNode -> IO ()
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foreign import ccall "app/bridge.h ts_node_p_name" ts_node_p_name :: Ptr TSNode -> Ptr TSDocument -> IO CString
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foreign import ccall "app/bridge.h ts_node_p_named_child_count" ts_node_p_named_child_count :: Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_named_child" ts_node_p_named_child :: Ptr TSNode -> CSize -> Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_pos_chars" ts_node_p_pos_chars :: Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_size_chars" ts_node_p_size_chars :: Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_start_point" ts_node_p_start_point :: Ptr TSNode -> IO CSize
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foreign import ccall "app/bridge.h ts_node_p_end_point" ts_node_p_end_point :: Ptr TSNode -> IO CSize
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keyedProductions :: Set String
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keyedProductions = fromList [ "object" ]
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fixedProductions :: Set String
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fixedProductions = fromList [ "pair", "rel_op", "math_op", "bool_op", "bitwise_op", "type_op", "math_assignment", "assignment", "subscript_access", "member_access", "new_expression", "function_call", "function", "ternary" ]
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parseTreeSitterFile :: Ptr TSLanguage -> Parser
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parseTreeSitterFile language contents = do
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document <- ts_document_make
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ts_document_set_language document language
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withCString contents (\source -> do
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ts_document_set_input_string document source
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ts_document_parse document
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term <- documentToTerm document contents
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ts_document_free document
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return term)
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documentToTerm :: Ptr TSDocument -> Parser
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documentToTerm document contents = alloca $ \root -> do
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ts_document_root_node_p document root
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snd <$> toTerm root where
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toTerm :: Ptr TSNode -> IO (String, Term String Info)
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toTerm node = do
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name <- ts_node_p_name node document
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name <- peekCString name
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children <- withNamedChildren node toTerm
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range <- range node
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lineRange <- getLineRange node
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annotation <- return . Info range lineRange $ singleton name
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return (name, annotation :< case children of
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[] -> Leaf $ substring range contents
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_ | member name keyedProductions -> Keyed $ Map.fromList children
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_ | member name fixedProductions -> Fixed $ fmap snd children
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_ | otherwise -> Indexed $ fmap snd children)
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withNamedChildren :: Ptr TSNode -> (Ptr TSNode -> IO (String, a)) -> IO [(String, a)]
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withNamedChildren node transformNode = do
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count <- ts_node_p_named_child_count node
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if count == 0
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then return []
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else mapM (alloca . getChild) [0..pred count] where
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getChild n out = do
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ts_node_p_named_child node n out
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transformNode out
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range :: Ptr TSNode -> IO Range
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range node = do
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pos <- ts_node_p_pos_chars node
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size <- ts_node_p_size_chars node
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let start = fromIntegral pos
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end = start + fromIntegral size
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return Range { start = start, end = end }
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getLineRange :: Ptr TSNode -> IO Range
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getLineRange node = do
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startLine <- ts_node_p_start_point node
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endLine <- ts_node_p_end_point node
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return Range { start = fromIntegral startLine, end = fromIntegral endLine }
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