//
// Helper for registering a weak type alias.
//
public void RegisterWeakAlias(Token nametoken, WeakAlias alias)
{
if (!WeakAliases.ContainsKey(nametoken.Text))
{
WeakAliases.Add(nametoken.Text, alias);
}
}
internal static ParsedWeakAlias Parse(ParseSession parser)
{
if (!parser.CheckToken(0, "alias"))
{
return(null);
}
var nametoken = parser.PeekToken(1);
if (nametoken == null)
{
return(null);
}
if (!parser.CheckToken(2, "="))
{
return(null);
}
parser.ConsumeTokens(4);
var aliastype = new WeakAlias {
};
return(new ParsedWeakAlias {
Name = nametoken, Type = aliastype
});
}
//
// Parse the code that was provided in construction, and stash the results
// in the given Project instance. This routine should do its best to avoid
// leaking exceptions generated by the parsing process itself, since those
// errors will propagate upward until VS detects them and turns off future
// operations by the VSIX package (until restarted).
//
public bool AugmentProject(Project project)
{
try
{
while (!Lexer.Empty)
{
var sumtype = SumType.Parse(this);
if (sumtype != null)
{
project.RegisterSumType(sumtype.Name, sumtype.Object);
continue;
}
var strongalias = StrongAlias.Parse(this);
if (strongalias != null)
{
project.RegisterStrongAlias(strongalias.Name, strongalias.Object);
continue;
}
var weakalias = WeakAlias.Parse(this);
if (weakalias != null)
{
project.RegisterWeakAlias(weakalias.Name, weakalias.Object);
continue;
}
var structure = Structure.Parse(this);
if (structure != null)
{
project.RegisterStructureType(structure.Name, structure.Object);
continue;
}
var globals = GlobalBlock.Parse(this);
if (globals != null)
{
globals.AugmentProject(project);
continue;
}
var function = FunctionSignature.Parse(this);
if (function != null)
{
project.RegisterFunction(function);
continue;
}
if (!Lexer.Empty)
{
throw new SyntaxError("Syntax error", PeekToken(0));
}
}
}
catch (SyntaxError ex)
{
var errorTask = new ErrorTask();
errorTask.Text = ex.Message;
errorTask.Category = TaskCategory.CodeSense;
errorTask.ErrorCategory = TaskErrorCategory.Error;
errorTask.Document = Lexer.FileName;
errorTask.Line = (ex.Origin != null) ? (ex.Origin.Line) : 0;
errorTask.Column = (ex.Origin != null) ? (ex.Origin.Column) : 0;
errorTask.Navigate += project.NavigationHandler;
ErrorProvider.Tasks.Add(errorTask);
return(false);
}
return(true);
}