public static bool TryParse(TextAndLocation textAndLocation, out TemplateParameter result)
{
var text = textAndLocation.Text;
var start = text.IndexOf('{');
if (start < 0 ||
text.IndexOf('}') < start ||
text.IndexOf('{', start) > 0)
{
result = default(TemplateParameter);
return(false);
}
start++;
SkipWhiteSpace(text, ref start);
var end = text.IndexOf('}', start);
if (end < 0)
{
result = default(TemplateParameter);
return(false);
}
BackWhiteSpace(text, ref end);
for (var i = start; i < end; i++)
{
switch (text[i])
{
case '?':
case ':':
end = i;
break;
}
}
result = new TemplateParameter(textAndLocation.Substring(start, end - start), text.Contains("?"), Type());
return(true);
TextAndLocation?Type()
{
var typeStart = text.IndexOf(':', start);
if (typeStart < 0)
{
return(null);
}
typeStart++;
SkipWhiteSpace(text, ref typeStart);
var typeEnd = text.IndexOf('}', typeStart);
if (typeEnd < 0)
{
return(null);
}
BackWhiteSpace(text, ref typeEnd);
return(textAndLocation.Substring(typeStart, typeEnd - typeStart));
}
}
public TemplateParameter(TextAndLocation name, bool isOptional, TextAndLocation?type)
{
this.Name = name;
this.IsOptional = isOptional;
this.Type = type;
}
public bool Equals(TextAndLocation other)
{
return(this.literal.Equals(other.literal) && this.start == other.start && this.end == other.end);
}
