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| author | Roman Smrž <roman.smrz@seznam.cz> | 2024-09-27 20:30:25 +0200 |
|---|---|---|
| committer | Roman Smrž <roman.smrz@seznam.cz> | 2024-09-27 21:03:29 +0200 |
| commit | afd550dc8245e61ab6b148c72cdf133e6b7836d1 (patch) | |
| tree | 9ceff9a181af372a35c9b906cacca11c7c26b18b /src/Parser/Core.hs | |
| parent | 213e3523aead4c18b65ac85886203d2508b9b27e (diff) | |
Default and context-provided values for function arguments
Diffstat (limited to 'src/Parser/Core.hs')
| -rw-r--r-- | src/Parser/Core.hs | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/src/Parser/Core.hs b/src/Parser/Core.hs index ab6079a..f40889a 100644 --- a/src/Parser/Core.hs +++ b/src/Parser/Core.hs @@ -134,11 +134,19 @@ unifyExpr off pa expr = if | Just (Refl :: FunctionType a :~: b) <- eqT -> do - case exprArgs expr of - remaining - | anull remaining -> return (FunctionEval expr) - | otherwise -> parseError $ FancyError off $ S.singleton $ ErrorFail $ T.unpack $ - "missing function arguments" + let FunctionArguments remaining = exprArgs expr + showType ( Nothing, SomeArgumentType atype ) = "`<" <> textExprType atype <> ">'" + showType ( Just (ArgumentKeyword kw), SomeArgumentType atype ) = "`" <> kw <> " <" <> textExprType atype <> ">'" + err = parseError . FancyError off . S.singleton . ErrorFail . T.unpack + + defaults <- forM (M.toAscList remaining) $ \case + arg@(_, SomeArgumentType NoDefault) -> err $ "missing " <> showType arg <> " argument" + (kw, SomeArgumentType (ExprDefault def)) -> return (kw, SomeExpr def) + (kw, SomeArgumentType atype@ContextDefault) -> do + SomeExpr context <- gets testContext + context' <- unifyExpr off atype context + return (kw, SomeExpr context') + return (FunctionEval $ ArgsApp (FunctionArguments $ M.fromAscList defaults) expr) | Just (Refl :: DynamicType :~: b) <- eqT , Undefined msg <- expr |