public void TestUnaryOpExp(UnaryOperatorAstNode expect,
UnaryOperatorAstNode actual, string traceMessage)
{
Assert.AreEqual(expect.Operator, expect.Operator,
traceMessage + " -> Operator");
TestGeneral(expect.Expr, actual.Expr, traceMessage + " -> UnaryExpr");
}
public void Visit(UnaryOperatorAstNode visitable)
{
if (visitable.Operator == "+" || visitable.Operator == "-")
{
BasicAstNode lhs;
if (visitable.Expr.GetType() == typeof(IntegerAstNode))
{
lhs = new IntegerAstNode(0);
}
else
{
lhs = new FloatAstNode(0);
}
Visit(new BinaryOperatorAstNode(visitable.Operator, lhs, visitable.Expr));
return;
}
switch (visitable.Operator)
{
case "address_of":
throw new NotSupportedException(
"It seems that clr does not support pointer");
case "not":
Visit(visitable.Expr);
Gen.Emit(OpCodes.Not);
break;
default:
throw new Exception(
"Unknown unary operator: " + visitable.Operator);
}
}
public void Visit(UnaryOperatorAstNode visitable)
{
if (visitable.Operator == "address_of")
{
throw new SemanticException("address_of operator is not implemented");
}
Visit(visitable.Expr);
if (_exprType != "i64")
{
throw new WrongTypeException(
$"Cannot use {visitable.Operator} on type: {_exprType}");
}
}
