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lavriapg
LavRia
TypeScript LALR(1) Parser Generator
install
requirement: npm
$ mkdir pg
$ cd pg
$ npm init
$ npm install lavriapg --save
sample
$ echo 1+1 | node ./node_modules/lavriapg/dist/sample.js
usage
edit language and run the following code:
// TypeScriptimport {language_parser, ParserGenerator} from "lavriapg";import {readFileSync} from "fs"; const input = readFileSync("/dev/stdin", "utf8") as string;const language = language_parser.parse(readFileSync("./node_modules/lavriapg/language", "utf8") as string); // set the language file pathconst parser = new ParserGenerator(language).getParser();console.log(parser.parse(input));// JavaScript(CommonJS)const pg = require("lavriapg");const fs = require("fs");const input = fs.readFileSync("/dev/stdin", "utf8");const language = pg.language_parser.parse(fs.readFileSync("./node_modules/lavriapg/language", "utf8")); // set the language file pathconst parser = new pg.ParserGenerator(language).getParser();console.log(parser.parse(input));this program parses input (from stdin) that has the lex and grammar rules defined by language and shows its AST.
language is language file and it expresses itself.
install
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