public BnfGrammar(bool enhanced = true)
: base("bnf")
{
if (enhanced)
{
foreach (var property in typeof(Terminals).GetProperties())
{
if (typeof(Parser).IsAssignableFrom(property.PropertyType))
{
var parser = property.GetValue(null, null) as Parser;
baseLookup[property.Name] = parser.Named(property.Name);
}
}
}
var lineEnd = sws & +(sws & Terminals.Eol);
literal = (
(sq & (+!sq).Named("value").Optional() & sq)
| (dq & (+!dq).Named("value").Optional() & dq)
).Named("parser");
RuleNameParser = "<" & Terminals.Set('>').Inverse().Repeat().Named("name") & ">";
RuleParser = new AlternativeParser(); // defined later
TermParser = literal | (ruleName = RuleNameParser.Named("parser"));
if (enhanced)
{
TermParser.Items.Add('(' & sws & RuleParser & sws & ')');
TermParser.Items.Add(repeatRule = ('{' & sws & RuleParser & sws & '}').Named("parser"));
TermParser.Items.Add(optionalRule = ('[' & sws & RuleParser & sws & ']').Named("parser"));
}
list = (TermParser.Named("term") & -(~((+Terminals.SingleLineWhiteSpace).Named("ws")) & TermParser.Named("term"))).Named("parser");
listRepeat = (list.Named("list") & ws & '|' & sws & ~(RuleParser.Named("expression"))).Named("parser");
RuleParser.Items.Add(listRepeat);
RuleParser.Items.Add(list);
rule = (~lineEnd & sws & RuleNameParser.Named("ruleName") & ws & ruleSeparator & sws & RuleParser & lineEnd).Named("parser");
Expresssions = new AlternativeParser();
Expresssions.Items.Add(rule);
this.Inner = ws & +Expresssions & ws;
AttachEvents();
}
public BnfGrammar(bool enhanced = true)
: base("bnf")
{
if (enhanced)
{
foreach (var terminal in Terminals.GetTerminals())
{
baseLookup[terminal.Item1] = terminal.Item2.Named(terminal.Item1);
}
}
literal = (
(sq & (+!sq).WithName("value").Optional() & sq)
| (dq & (+!dq).WithName("value").Optional() & dq)
| ((+(Terminals.WhiteSpace.Inverse().Except(Terminals.Set("<[{(|)}]>"))))).WithName("value")
).WithName("parser");
RuleNameParser = "<" & Terminals.Set("<>").Inverse().Repeat().WithName("name") & ">";
RuleParser = new AlternativeParser(); // defined later
TermParser = ((ruleName = RuleNameParser.Named("parser")).NotFollowedBy(ows & ruleSeparator)) | literal;
TermParser.Name = "term";
if (enhanced)
{
TermParser.Items.Add('(' & ows & RuleParser & ows & ')');
TermParser.Items.Add(repeatRule = ('{' & ows & RuleParser & ows & '}').WithName("parser"));
TermParser.Items.Add(optionalRule = ('[' & ows & RuleParser & ows & ']').WithName("parser"));
}
TermParser.Items.Add((ows & RuleNameParser & ows & ruleSeparator).Not() & Terminals.Set("<[{(}]>").WithName("value").Named("parser"));
list = (TermParser & -(~(rws.Named("ws")) & TermParser)).WithName("parser");
listRepeat = (list.Named("list") & ows & '|' & ~(ows & RuleParser.Named("expression"))).WithName("parser");
RuleParser.Items.Add(listRepeat);
RuleParser.Items.Add(list);
rule = (RuleNameParser.Named("ruleName") & ows & ruleSeparator & ows & RuleParser).WithName("parser");
Expresssions = new AlternativeParser();
Expresssions.Items.Add(rule);
this.Inner = ows & (+Expresssions).SeparatedBy(rws) & ows;
AttachEvents();
}
