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Disallow empty tuples on the left hand side
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@ -1288,6 +1288,9 @@ void TypeChecker::checkExpressionAssignment(Type const& _type, Expression const&
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{
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if (auto const* tupleExpression = dynamic_cast<TupleExpression const*>(&_expression))
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{
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if (tupleExpression->components().empty())
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m_errorReporter.typeError(_expression.location(), "Empty tuple on the left hand side.");
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auto const* tupleType = dynamic_cast<TupleType const*>(&_type);
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auto const& types = tupleType && tupleExpression->components().size() != 1 ? tupleType->components() : vector<TypePointer> { &_type };
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@ -16,9 +16,14 @@ contract C {
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}
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}
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// ----
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// TypeError: (41-43): Empty tuple on the left hand side.
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// TypeError: (47-48): Type int_const 2 is not implicitly convertible to expected type tuple().
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// TypeError: (86-88): Empty tuple on the left hand side.
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// TypeError: (173-175): Empty tuple on the left hand side.
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// TypeError: (178-182): Type tuple(uint256,uint256) is not implicitly convertible to expected type tuple().
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// TypeError: (166-182): Different number of arguments in return statement than in returns declaration.
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// TypeError: (229-231): Empty tuple on the left hand side.
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// TypeError: (401-404): Empty tuple on the left hand side.
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// TypeError: (399-466): Compound assignment is not allowed for tuple types.
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// TypeError: (410-466): Type bytes32 is not implicitly convertible to expected type tuple().
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// TypeError: (389-396): No matching declaration found after argument-dependent lookup.
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