public void Visit(TableVariableReference 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(variable.Id)) };
}
else if (!Scope.Current.IsTableRegistered(variable.Id)) //has to be a table
{
Errors.Add(new NotTableVariableException(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(variable.Id)) };
}
else
{
scope = Scope.FindScope(variable.Id);
codeType = scope.GetScope(variable.Id);
}
_codeStack.Peek().Scope = codeType;
_codeStack.Peek().CodeExpression = new CodeVariableReferenceExpression("_" + scope.ScopeIdentifier + "." + variable.Id);
}
public void Visit(TableVariableReference variable, CommonTree tree)
{
Parent(tree).Children.Add(variable);
SetLine(variable, tree);
variable.Id = tree.Text;
}
public void Visit(UpdateStatement statement)
{
using (Scope.PushSelect())
{
CodeMemberMethod method = new CodeMemberMethod();
method.Name = "Update_" + Guid.NewGuid().ToString("N");
method.Attributes = MemberAttributes.Private;
GenerateCallStatement(method.Statements, statement.Line.Line);
_mainType.Type.Members.Add(method);
FromStatement fromStatement = null;
if (statement.From == null) //alias must be a table ref
{
var tableReference = new TableVariableReference() { Id = statement.Alias.Id, Line = statement.Alias.Line };
fromStatement = new FromStatement() { Line = tableReference.Line };
fromStatement.Children.Add(tableReference);
}
else
fromStatement = statement.From;
var fromDomArg = VisitChild(fromStatement);
var rowType = fromDomArg.Scope.CodeDomReference.TypeArguments[0];
var type = Scope.Current.FindTypeWithAlias(statement.Alias.Id);
if (type != null && type == typeof(FileTable<>)) //filetables cannot be updated only inserted into
Errors.Add(new FileTableImmutable(new Semantic.LineInfo(statement.Line.Line, statement.Line.CharacterPosition)));
method.Statements.Add(new CodeVariableDeclarationStatement(fromDomArg.Scope.CodeDomReference,
"fromTable",
fromDomArg.CodeExpression));
if (statement.Where != null)
{
var domWhereArgs = VisitChild(statement.Where, new CodeDomArg() { Scope = fromDomArg.Scope });
method.Statements.Add(new CodeAssignStatement(new CodeVariableReferenceExpression("fromTable"), domWhereArgs.CodeExpression));
}
//outside iterator
method.Statements.Add(new CodeVariableDeclarationStatement(new CodeTypeReference("IEnumerator", rowType),
"x",
new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(new CodeTypeReferenceExpression("fromTable"), "GetEnumerator",
null))));
var loop = new CodeIterationStatement();
loop.InitStatement = new CodeSnippetStatement();
loop.IncrementStatement = new CodeSnippetStatement();
loop.TestExpression = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(new CodeTypeReferenceExpression("x"), "MoveNext",
null));
loop.Statements.Add(new CodeVariableDeclarationStatement(rowType,
"row",
new CodePropertyReferenceExpression(new CodeTypeReferenceExpression("x"), "Current")));
foreach (var a in statement.SetArgs.AssignStatements)
{
var assignmentArg = VisitChild(a);
loop.Statements.AddRange(assignmentArg.ParentStatements);
}
method.Statements.Add(loop);
var methodcall = new CodeMethodInvokeExpression(
new CodeMethodReferenceExpression(null, method.Name));
_codeStack.Peek().CodeExpression = methodcall;
_codeStack.Peek().ParentStatements.Add(methodcall);
}
}