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Compiler for assignments.

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This commit is contained in:
Christian
2014-10-29 14:33:25 +01:00
parent 01224287f5
commit b5a4d12fa3
5 changed files with 123 additions and 29 deletions
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AST.cpp
+10 -3
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@@ -326,6 +326,8 @@ void Assignment::checkTypeRequirements()
//@todo lefthandside actually has to be assignable
// add a feature to the type system to check that
m_leftHandSide->checkTypeRequirements();
if (!m_leftHandSide->isLvalue())
BOOST_THROW_EXCEPTION(createTypeError("Expression has to be an lvalue."));
expectType(*m_rightHandSide, *m_leftHandSide->getType());
m_type = m_leftHandSide->getType();
if (m_assigmentOperator != Token::ASSIGN)
@@ -338,8 +340,13 @@ void Assignment::checkTypeRequirements()
void UnaryOperation::checkTypeRequirements()
{
// INC, DEC, NOT, BIT_NOT, DELETE
// INC, DEC, ADD, SUB, NOT, BIT_NOT, DELETE
m_subExpression->checkTypeRequirements();
if (m_operator == Token::Value::INC || m_operator == Token::Value::DEC || m_operator == Token::Value::DELETE)
{
if (!m_subExpression->isLvalue())
BOOST_THROW_EXCEPTION(createTypeError("Expression has to be an lvalue."));
}
m_type = m_subExpression->getType();
if (!m_type->acceptsUnaryOperator(m_operator))
BOOST_THROW_EXCEPTION(createTypeError("Unary operator not compatible with type."));
@@ -441,9 +448,9 @@ void Identifier::checkTypeRequirements()
if (variable)
{
if (!variable->getType())
BOOST_THROW_EXCEPTION(createTypeError("Variable referenced before type "
"could be determined."));
BOOST_THROW_EXCEPTION(createTypeError("Variable referenced before type could be determined."));
m_type = variable->getType();
m_isLvalue = true;
return;
}
//@todo can we unify these with TypeName::toType()?