js-slang
Version:
Javascript-based implementations of Source, written in Typescript
47 lines • 2.01 kB
JavaScript
;
/**
* The main entry point of the scheme transpiler.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.schemeParse = exports.ParserError = exports.LexerError = void 0;
const lexer_1 = require("./lexer");
const parser_1 = require("./parser");
const visitors_1 = require("./visitors");
const __1 = require("..");
var lexer_2 = require("./lexer");
Object.defineProperty(exports, "LexerError", { enumerable: true, get: function () { return lexer_2.LexerError; } });
var parser_2 = require("./parser");
Object.defineProperty(exports, "ParserError", { enumerable: true, get: function () { return parser_2.ParserError; } });
/**
* Transpiles Scheme source code into an ESTree program.
* @param source The Scheme source code
* @param chapter The chapter of the Scheme language.
* If not provided, defaults to the latest version.
* @returns
*/
function schemeParse(source, chapter, encode) {
// Instantiate the lexer
const lexer = new lexer_1.SchemeLexer(source);
// Generate tokens
const tokens = lexer.scanTokens();
// Instantiate the parser
const parser = new parser_1.SchemeParser(source, tokens, chapter);
// The Scheme AST is represented as an
// array of expressions, which is all top-level expressions
// Generate the first AST
const firstAST = parser.parse();
// We instantiate all the visitors
const simplifier = visitors_1.Simplifier.create();
const redefiner = visitors_1.Redefiner.create();
const transpiler = visitors_1.Transpiler.create();
// TODO: Then we macro-expand the AST
// Then we simplify the AST
const simplifiedAST = simplifier.simplify(firstAST);
// Then we redefine the AST
const redefinedAST = redefiner.redefine(simplifiedAST);
// Finally we transpile the AST
const program = transpiler.transpile(redefinedAST);
return encode ? (0, __1.estreeEncode)(program) : program;
}
exports.schemeParse = schemeParse;
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