private DOM.Antlr.AliasDefinition LookupAliasDef(DOM.Antlr.Alias alias)
{
if (alias.AliasDefinition != null)
{
return(alias.AliasDefinition == AliasDefinition.Undefined ? null : alias.AliasDefinition);
}
var result = _context.NamespaceResolver.GetAliasDefinition(alias.Name);
alias.AliasDefinition = result ?? AliasDefinition.Undefined;
return(result);
}
private int CalcNumOfRootElements(DOM.Antlr.Alias alias, List <DOM.AliasDefinition> aliasList)
{
int result = 0;
var aliasDef = LookupAliasDef(alias);
if (aliasDef == null)
{
return(0);
}
//Checking if there is circular reference to prevent infinite loop.
if (aliasList == null)
{
aliasList = new List <DOM.AliasDefinition>();
}
if (aliasList.Any(n => n == aliasDef))
{
return(0);
}
aliasList.Add(aliasDef);
foreach (var entity in aliasDef.Entities)
{
if (entity is DOM.Element)
{
result++;
}
var aliasEntity = entity as DOM.Antlr.Alias;
if (aliasEntity != null)
{
result += CalcNumOfRootElements(aliasEntity, aliasList);
}
}
return(result);
}
private NsInfo ResolveAliasInModuleMember(DOM.Antlr.Alias alias, NsInfo memberNsInfo)
{
//Finding AliasDef
var aliasDef = LookupAliasDef(alias);
if (aliasDef == null)
{
//Report Error if alias is not defined
_context.AddError(CompilerErrorFactory.AliasIsNotDefined(alias, memberNsInfo.ModuleMember.Module.FileName));
return(null);
}
if (aliasDef.IsValueNode != alias.IsValueNode)
{
_context.AddError(aliasDef.IsValueNode
? CompilerErrorFactory.CantUseValueAliasInTheBlock(alias, memberNsInfo.ModuleMember.Module.FileName)
: CompilerErrorFactory.CantUseBlockAliasAsValue(alias, memberNsInfo.ModuleMember.Module.FileName));
}
CheckAliasArguments(alias, aliasDef, memberNsInfo);
return(ResolveAliasesInAliasDefinition(aliasDef));
}
private void CheckDuplicateArguments(DOM.Antlr.Alias alias)
{
var dups = alias.Arguments.GroupBy(a => a.Name).Where(g => g.Count() > 1).SelectMany(g => g).ToList();
dups.ForEach(a => _context.AddError(CompilerErrorFactory.DuplicateArgumentName(a, _currentModule.FileName)));
}
/// <summary>
/// Adds Alias to the Namespace Info of the current Module Member.
/// </summary>
/// <param name="node"></param>
public void AddAlias(DOM.Antlr.Alias node)
{
CurrentModuleMemberNsInfo.Aliases.Add(node);
}
public void ProcessAlias(DOM.Antlr.Alias node)
{
CheckDuplicateArguments(node);
}