public void Visit(VariableReferance variable)
{
IScopeData codeType;
Scope scope = Scope.Current;
if (!Scope.Current.IsRegistered(variable.Id)) //If variable doesn't exist we need to register Sematic error
{
Errors.Add(new UnknownVariableReferenceException(new Semantic.LineInfo(variable.Line.Line, variable.Line.CharacterPosition), variable.Id));
codeType = new ScopeData<TableDescriptor> { Type = new TableDescriptor(null), CodeDomReference = new CodeTypeReference("Table", new CodeTypeReference("3ab508bc-31b8-486f-a10a-4f5714f80a3b")) };
}
else
{
scope = Scope.FindScope(variable.Id);
codeType = scope.GetScope(variable.Id);
}
_codeStack.Peek().Scope = codeType;
_codeStack.Peek().CodeExpression = scope.CreateExpression(variable.Id);
}
public void Visit(SelectId id)
{
_codeStack.Peek().Scope = new ScopeData<Type> { Type = typeof(int), CodeDomReference = new CodeTypeReference(typeof(int)) };
_codeStack.Peek().CodeExpression = new CodeFieldReferenceExpression(new CodeTypeReferenceExpression("row"), id.Id);
_codeStack.Peek()
.ParentStatements.Add(new CodeMethodInvokeExpression(new CodeTypeReferenceExpression("result"),
"AddColumn",
new CodePrimitiveExpression(id.Id)));
//1. Here we need to look through the select scope to get the variable.
//If there, put correct table prefix.
//if more than one we need to throw error
//if we can't find we need to dig up the scope
var tableMatches = Scope.Current.FindTableVariable(id.Id);
if(tableMatches.Length > 0)
{
if (tableMatches.Length == 1) //we only found one
{
_codeStack.Peek().CodeExpression = new CodeFieldReferenceExpression(new CodeFieldReferenceExpression(new CodeVariableReferenceExpression("row"), tableMatches[0].TableAlias), id.Id);
_codeStack.Peek().Scope = new ScopeData<Type> { Type = tableMatches[0].TableVariable.Primitive.Type, CodeDomReference = new CodeTypeReference(tableMatches[0].TableVariable.Primitive.Type) };
}
else //error we found more than 1
Errors.Add(new AmbiguousSelectVariable(tableMatches, new Semantic.LineInfo(id.Line.Line, id.Line.CharacterPosition)));
}
else //not found in the table variable so look up scope
{
//Need to check in the Scope to see if variable is defined there. If in select statmenet it is valid to put variables in it.
if (Scope.Current.IsRegistered(id.Id))
{
var variable = new VariableReferance() { Id = id.Id, Line = id.Line };
var variableArgs = VisitChild(variable);
_codeStack.Peek().CodeExpression = variableArgs.CodeExpression;
_codeStack.Peek().Scope = variableArgs.Scope;
}
else
Errors.Add(new UnknownSelectVariableException(new Semantic.LineInfo(id.Line.Line, id.Line.CharacterPosition), id.Id));
}
}
public void Visit(VariableReferance variable, CommonTree tree)
{
Parent(tree).Children.Add(variable);
SetLine(variable, tree);
variable.Id = tree.Text;
}
