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fix objects not comparable to null

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Maybe Fabian Noll aber vielleicht auch nicht. Ist ein bisschen ne Glaubenssache :) 2024-06-27 18:08:36 +02:00
parent f09e6ad09e
commit 504e26dcdd
1 changed files with 7 additions and 2 deletions
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9
src/Typecheck.hs
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@ -408,9 +408,14 @@ checkComparisonOperation op expr1' expr2' type1 type2
checkEqualityOperation :: BinaryOperator -> Expression -> Expression -> DataType -> DataType -> Expression
checkEqualityOperation op expr1' expr2' type1 type2
| type1 == type2 =
| type1 == type2 || (type1 == "null" && isObjectType type2) || (type2 == "null" && isObjectType type1) =
TypedExpression "boolean" (BinaryOperation op expr1' expr2')
| otherwise = error $ "Equality operation " ++ show op ++ " requires operands of the same type"
| type1 /= type2 =
error $ "Equality operation " ++ show op ++ " requires operands of the same type. Found types: " ++ type1 ++ " and " ++ type2
| (type1 == "null" && not (isObjectType type2)) || (type2 == "null" && not (isObjectType type1)) =
error $ "Equality operation " ++ show op ++ " requires that null can only be compared with object types. Found types: " ++ type1 ++ " and " ++ type2
| otherwise = error $ "Equality operation " ++ show op ++ " encountered unexpected types: " ++ type1 ++ " and " ++ type2
checkLogicalOperation :: BinaryOperator -> Expression -> Expression -> DataType -> DataType -> Expression
checkLogicalOperation op expr1' expr2' type1 type2