static ITerm CreateTerm(char ch)
{
ITerm result;
if (char.IsLower(ch))
{
result = new Terminal(ch.ToString());
}
else
{
result = new NonTerminal(ch.ToString());
}
return(result);
}
static Grammar MakeGrammar()
{
var I = new NonTerminal("I");
var T = new NonTerminal("T");
var M = new NonTerminal("M");
var K = new NonTerminal("K");
var a = new Terminal("a");
var b = new Terminal("b");
var c = new Terminal("c");
var b1 = new Terminal("(");
var b2 = new Terminal(")");
var s1 = new Terminal("+");
var s2 = new Terminal("-");
var s3 = new Terminal("*");
var s4 = new Terminal("/");
var rules = new[]
{
I[T],
I[I, s1, T],
I[I, s2, T],
T[M],
T[T, s3, M],
T[T, s4, M],
M[b1, I, b2],
M[K],
K[a],
K[b],
K[c],
};
var grammar = new Grammar(
rules.GroupBy(r => r.NonTerminal.Name)
.Select(g => new Rule(g.First().NonTerminal, g.SelectMany(r => r.Alts)))
)
{
Log = Console.WriteLine
};
grammar.Rules.First().IsStart = true;
return(grammar);
}