public Template(IParsingResultExtended name, TemplateArgs arguments)
{
Name = name;
Arguments = arguments;
}
public static IParsingResultExtended Parse(ParsingContext context)
{
RewindState rewind = context.RewindState;
IParsingResultExtended result = null;
bool isResultTemplatePrefix = false;
while (!context.Parser.IsEnd)
{
bool isResultTemplatePrefixNext = false;
switch (context.Parser.Peek)
{
case 'S':
{
IParsingResultExtended substitution = Substitution.Parse(context);
if (substitution == null)
{
context.Rewind(rewind);
return(null);
}
result = substitution;
}
break;
case 'T':
{
IParsingResultExtended param = TemplateParam.Parse(context);
if (param == null)
{
context.Rewind(rewind);
return(null);
}
result = AddToSubstitutionTable(context, param);
isResultTemplatePrefixNext = true;
}
break;
case 'D':
{
IParsingResultExtended decltype = Decltype.Parse(context);
if (decltype != null)
{
result = AddToSubstitutionTable(context, decltype);
}
else
{
IParsingResultExtended name = UnqualifiedName.Parse(context);
if (name == null)
{
context.Rewind(rewind);
return(null);
}
if (result != null)
{
result = AddToSubstitutionTable(context, new NestedName(result, name));
}
else
{
result = AddToSubstitutionTable(context, name);
}
isResultTemplatePrefixNext = true;
}
}
break;
default:
if (context.Parser.Peek == 'I' && result != null && isResultTemplatePrefix)
{
TemplateArgs arguments = TemplateArgs.Parse(context);
if (arguments == null)
{
context.Rewind(rewind);
return(null);
}
result = AddToSubstitutionTable(context, new Template(result, arguments));
}
else if (result != null && SourceName.StartsWith(context))
{
Debug.Assert(UnqualifiedName.StartsWith(context));
Debug.Assert(DataMemberPrefix.StartsWith(context));
IParsingResultExtended name = SourceName.Parse(context);
if (name == null)
{
context.Rewind(rewind);
return(null);
}
if (context.Parser.VerifyString("M"))
{
result = AddToSubstitutionTable(context, new DataMember(result, name));
}
else
{
if (result != null)
{
result = AddToSubstitutionTable(context, new NestedName(result, name));
}
else
{
result = AddToSubstitutionTable(context, name);
}
isResultTemplatePrefixNext = true;
}
}
else if (UnqualifiedName.StartsWith(context))
{
IParsingResultExtended name = UnqualifiedName.Parse(context);
if (name == null)
{
context.Rewind(rewind);
return(null);
}
if (result != null)
{
result = AddToSubstitutionTable(context, new NestedName(result, name));
}
else
{
result = AddToSubstitutionTable(context, name);
}
isResultTemplatePrefixNext = true;
}
else
{
if (result != null)
{
return(result);
}
context.Rewind(rewind);
return(null);
}
break;
}
isResultTemplatePrefix = isResultTemplatePrefixNext;
}
return(result);
}
