//
// 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);
}
internal static ParsedSumType Parse(ParseSession parser)
{
int totaltokens = 0;
if (!parser.CheckToken(0, "type"))
{
return(null);
}
Token sumtypename = parser.PeekToken(1);
if (sumtypename == null || string.IsNullOrEmpty(sumtypename.Text))
{
return(null);
}
if (parser.CheckToken(2, "<"))
{
if (!parser.ParseTemplateParameters(3, sumtypename, out totaltokens))
{
return(null);
}
if (!parser.CheckToken(totaltokens, ":"))
{
return(null);
}
}
else if (!parser.CheckToken(2, ":"))
{
return(null);
}
else if (!parser.CheckToken(4, "|"))
{
return(null);
}
else
{
totaltokens = 2;
}
do
{
++totaltokens;
if (parser.CheckToken(totaltokens + 1, "<"))
{
var token = parser.PeekToken(totaltokens);
if (token == null)
{
return(null);
}
if (!parser.ParseTemplateArguments(totaltokens + 2, token, out totaltokens))
{
return(null);
}
}
else
{
++totaltokens;
}
} while (parser.CheckToken(totaltokens, "|"));
// Success! Consume everything and return the constructed result
parser.ConsumeTokens(totaltokens);
var sumtype = new SumType {
};
return(new ParsedSumType {
Name = sumtypename, Type = sumtype
});
}