sif-ts

sif

Node.JS tokenizer/lexer that works similar to flex-bison/lex-yacc.

Example

See ./examples for some basic examples using sif.

const grammar = new Grammar();
grammar
    .for("ROOT",         p => p.expect("ELE"))
    .for("ELE",          p => p.expect("ELE_TAG ELE_TAG_TAIL"))
    .for("ELE_TAG_TAIL", p => p.expect("GTHAN ELE[] END_START IDENTIFIER GTHAN"))
    .for("ELE_TAG_TAIL", p => p.expect("FSLASH GTHAN"))
    .for("ELE_TAG",      p => p.expect("LTHAN IDENTIFIER PROPERTY[]"))
    .for("PROPERTY",     p => p.expect("IDENTIFIER EQUAL VALUE"))
    .for("VALUE",        p => p.expect("STRING"))
    .for("VALUE",        p => p.expect("INTEGER"))
    .for("VALUE",        p => p.expect("FLOAT"))

const tokenizer = Tokenizer.fromJson(data);
const lexer = new Lexer('ROOT', grammar, tokenizer);
lexer.parse(process.argv[2]);