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Parse binding statements.

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This commit is contained in:
Rob Rix 2019-07-22 15:04:46 -04:00
parent a39e7730ea
commit a77ecdbe78
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1 changed files with 8 additions and 1 deletions
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9
semantic-core/src/Data/Core/Parser.hs
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@ -1,3 +1,4 @@
{-# LANGUAGE TypeOperators #-}
module Data.Core.Parser
( module Text.Trifecta
, core
@ -67,7 +68,13 @@ atom = choice
]
comp :: (TokenParsing m, Monad m) => m (Term Core User)
comp = braces (Core.block <$> sepEndByNonEmpty expr semi) <?> "compound statement"
comp = braces (Core.do' <$> sepEndByNonEmpty statement semi) <?> "compound statement"
statement :: (TokenParsing m, Monad m) => m (Maybe (Named User) Core.:<- Term Core User)
statement
= try ((Core.:<-) . Just <$> name <* symbol "<-" <*> expr)
<|> (Nothing Core.:<-) <$> expr
<?> "statement"
ifthenelse :: (TokenParsing m, Monad m) => m (Term Core User)
ifthenelse = Core.if'