public static Parser GenParser()
{
var compileClosure = new Dictionary <string, Ast>();
var expr = new Ast(
compileClosure: ref compileClosure,
name: "Expr",
ebnf: new BaseAst[]
{
new Seq(
compileClosure: ref compileClosure,
atleast: 0,
name: "Or+",
ebnf: new BaseAst[]
{
new LazyDef("Or")
}
)
}
);
var or = new Ast(
compileClosure: ref compileClosure,
name: "Or",
ebnf: new BaseAst[]
{
new LazyDef("AtomExpr"),
new Seq(
compileClosure: ref compileClosure,
atleast: 0,
name: "('|' AtomExpr)*",
ebnf: new BaseAst[]
{
DefualtToken.OrSign,
new LazyDef("AtomExpr")
}
)
}
);
var atomExpr = new Ast(
compileClosure: ref compileClosure,
name: "AtomExpr",
ebnf: new BaseAst[]
{
new LazyDef("Atom"),
new LazyDef("Trailer")
}
);
var trailer = new Seq(
ref compileClosure,
"Trailer",
0,
ebnf: new[]
{
new BaseAst[]
{
DefualtToken.SeqStar
},
new BaseAst[]
{
DefualtToken.SeqPlus
},
new BaseAst[]
{
DefualtToken.Lbb,
new Seq(
compileClosure: ref compileClosure,
atleast: 1,
atmost: 2,
name: "Number{1 2}",
ebnf: new BaseAst[]
{
DefualtToken.Number
}),
DefualtToken.Rbb
}
}
);
var atom = new Ast(
ref compileClosure,
"Atom", new BaseAst[]
{
DefualtToken.Name
}, new BaseAst[]
{
DefualtToken.Str
}, new BaseAst[]
{
DefualtToken.Lb,
new LazyDef("Expr"),
DefualtToken.Rb
}, new BaseAst[]
{
DefualtToken.Lp,
new LazyDef("Expr"),
DefualtToken.Rp
});
var eq = new Ast(
compileClosure: ref compileClosure,
name: "Eq",
ebnf: new BaseAst[]
{
DefualtToken.Name,
DefualtToken.Def,
new LazyDef("Expr")
}
);
var stmt = new Ast(
compileClosure: ref compileClosure,
name: "Stmt",
ebnf: new BaseAst[]
{
new Seq(
compileClosure: ref compileClosure,
name: "Eq*",
atleast: 0,
ebnf: new BaseAst[]
{
new LazyDef("SPLIT"),
new LazyDef("Eq"),
new LazyDef("SPLIT")
}
)
}
);
var split = new Seq(
compileClosure: ref compileClosure,
name: "SPLIT",
atleast: 0,
ebnf: new BaseAst[]
{
DefualtToken.Newline
}
);
var namestore = new HashSet <string>();
split.Compile(ref namestore);
stmt.Compile(ref namestore);
return(new Parser(
expr: expr,
atom: atom,
eq: eq,
or: or,
stmt: stmt,
atomExpr: atomExpr,
trailer: trailer,
split: split,
compileClosure: compileClosure
));
}