mirror of
https://github.com/github/semantic.git
synced 2024-12-01 00:33:59 +03:00
105 lines
4.9 KiB
Haskell
105 lines
4.9 KiB
Haskell
module TreeSitter where
|
|
|
|
import Diff
|
|
import Range
|
|
import Syntax
|
|
import Term
|
|
import Control.Comonad.Cofree
|
|
import qualified OrderedMap as Map
|
|
import Data.Set
|
|
import Foreign
|
|
import Foreign.C
|
|
import Foreign.C.Types
|
|
|
|
data TSLanguage = TsLanguage deriving (Show, Eq)
|
|
foreign import ccall "prototype/doubt-difftool/doubt-difftool-Bridging-Header.h ts_language_c" ts_language_c :: Ptr TSLanguage
|
|
foreign import ccall "prototype/doubt-difftool/doubt-difftool-Bridging-Header.h ts_language_javascript" ts_language_javascript :: Ptr TSLanguage
|
|
|
|
data TSDocument = TsDocument deriving (Show, Eq)
|
|
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_make" ts_document_make :: IO (Ptr TSDocument)
|
|
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 ()
|
|
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 ()
|
|
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_parse" ts_document_parse :: Ptr TSDocument -> IO ()
|
|
foreign import ccall "prototype/External/tree-sitter/include/tree_sitter/runtime.h ts_document_free" ts_document_free :: Ptr TSDocument -> IO ()
|
|
|
|
data TSLength = TsLength { bytes :: CSize, chars :: CSize }
|
|
deriving (Show, Eq)
|
|
|
|
data TSNode = TsNode { _data :: Ptr (), offset :: TSLength }
|
|
deriving (Show, Eq)
|
|
|
|
instance Storable TSNode where
|
|
alignment _ = 24
|
|
sizeOf _ = 24
|
|
peek _ = error "Haskell code should never read TSNode values directly."
|
|
poke _ _ = error "Haskell code should never write TSNode values directly."
|
|
|
|
foreign import ccall "app/bridge.h ts_document_root_node_p" ts_document_root_node_p :: Ptr TSDocument -> Ptr TSNode -> IO ()
|
|
foreign import ccall "app/bridge.h ts_node_p_name" ts_node_p_name :: Ptr TSNode -> Ptr TSDocument -> IO CString
|
|
foreign import ccall "app/bridge.h ts_node_p_named_child_count" ts_node_p_named_child_count :: Ptr TSNode -> IO CSize
|
|
foreign import ccall "app/bridge.h ts_node_p_named_child" ts_node_p_named_child :: Ptr TSNode -> CSize -> Ptr TSNode -> IO CSize
|
|
foreign import ccall "app/bridge.h ts_node_p_pos_chars" ts_node_p_pos_chars :: Ptr TSNode -> IO CSize
|
|
foreign import ccall "app/bridge.h ts_node_p_size_chars" ts_node_p_size_chars :: Ptr TSNode -> IO CSize
|
|
|
|
keyedProductions :: Set String
|
|
keyedProductions = fromList [ "object" ]
|
|
|
|
fixedProductions :: Set String
|
|
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" ]
|
|
|
|
languageForType :: String -> Maybe (Ptr TSLanguage)
|
|
languageForType mediaType = case mediaType of
|
|
".h" -> Just ts_language_c
|
|
".c" -> Just ts_language_c
|
|
".js" -> Just ts_language_javascript
|
|
_ -> Nothing
|
|
|
|
parseTreeSitterFile :: Ptr TSLanguage -> String -> IO (Term String Info)
|
|
parseTreeSitterFile language contents = do
|
|
document <- ts_document_make
|
|
ts_document_set_language document language
|
|
withCString contents (\source -> do
|
|
ts_document_set_input_string document source
|
|
ts_document_parse document
|
|
term <- documentToTerm document contents
|
|
ts_document_free document
|
|
return term)
|
|
|
|
documentToTerm :: Ptr TSDocument -> String -> IO (Term String Info)
|
|
documentToTerm document contents = alloca $ \root -> do
|
|
ts_document_root_node_p document root
|
|
snd <$> toTerm root where
|
|
toTerm :: Ptr TSNode -> IO (String, Term String Info)
|
|
toTerm node = do
|
|
name <- ts_node_p_name node document
|
|
name <- peekCString name
|
|
children <- withNamedChildren node toTerm
|
|
range <- range node
|
|
annotation <- return . Info range $ singleton name
|
|
return (name, annotation :< case children of
|
|
[] -> Leaf $ substring range contents
|
|
_ | member name keyedProductions -> Keyed . Map.fromList $ assignKey <$> children
|
|
_ | member name fixedProductions -> Fixed $ fmap snd children
|
|
_ | otherwise -> Indexed $ fmap snd children)
|
|
where assignKey ("pair", node@(_ :< Fixed (key : _))) = (getSubstring key, node)
|
|
assignKey (_, node) = (getSubstring node, node)
|
|
getSubstring (Info range _ :< _) = substring range contents
|
|
|
|
withNamedChildren :: Ptr TSNode -> (Ptr TSNode -> IO (String, a)) -> IO [(String, a)]
|
|
withNamedChildren node transformNode = do
|
|
count <- ts_node_p_named_child_count node
|
|
if count == 0
|
|
then return []
|
|
else mapM (alloca . getChild) [0..pred count] where
|
|
getChild n out = do
|
|
_ <- ts_node_p_named_child node n out
|
|
transformNode out
|
|
|
|
range :: Ptr TSNode -> IO Range
|
|
range node = do
|
|
pos <- ts_node_p_pos_chars node
|
|
size <- ts_node_p_size_chars node
|
|
let start = fromIntegral pos
|
|
end = start + fromIntegral size
|
|
return Range { start = start, end = end }
|