Ast.UnaryExpression ParseUnaryExpr(ParseTreeNode node)
{
if (node.Term.Name == "UnaryExpr")
{
Ast.IExpression expr = ParseExpression(node.ChildNodes[1]);
var opNode = node.ChildNodes[0].ChildNodes[0];
Ast.UnaryOp op = Ast.UnaryOp.Invert;
switch (opNode.Token.ValueString)
{
case "not":
op = Ast.UnaryOp.Negate; break;
case "-":
op = Ast.UnaryOp.Invert; break;
case "#":
op = Ast.UnaryOp.Length; break;
}
return(new Ast.UnaryExpression()
{
Expression = expr,
Operation = op
});
}
throw new Exception("Invalid UnaryExpr node");
}
public UnaryOp(Ast.UnaryOp operation, Expression operand)
{
Operation = operation;
Operand = operand;
}