js-slang
Version:
Javascript-based implementations of Source, written in Typescript
108 lines • 3.53 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __exportStar = (this && this.__exportStar) || function(m, exports) {
for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports, p)) __createBinding(exports, m, p);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.decode = exports.encode = exports.schemeParse = exports.ParserError = exports.LexerError = exports.unparse = void 0;
const js_base64_1 = require("js-base64");
__exportStar(require("./utils/encoder-visitor"), exports);
var reverse_parser_1 = require("./utils/reverse_parser");
Object.defineProperty(exports, "unparse", { enumerable: true, get: function () { return reverse_parser_1.unparse; } });
var transpiler_1 = require("./transpiler");
Object.defineProperty(exports, "LexerError", { enumerable: true, get: function () { return transpiler_1.LexerError; } });
var transpiler_2 = require("./transpiler");
Object.defineProperty(exports, "ParserError", { enumerable: true, get: function () { return transpiler_2.ParserError; } });
var transpiler_3 = require("./transpiler");
Object.defineProperty(exports, "schemeParse", { enumerable: true, get: function () { return transpiler_3.schemeParse; } });
const JS_KEYWORDS = [
"break",
"case",
"catch",
"class",
"const",
"continue",
"debugger",
"default",
"delete",
"do",
"else",
"eval",
"export",
"extends",
"false",
"finally",
"for",
"function",
"if",
"import",
"in",
"instanceof",
"new",
"return",
"super",
"switch",
"this",
"throw",
"true",
"try",
"typeof",
"var",
"void",
"while",
"with",
"yield",
"enum",
"await",
"implements",
"package",
"protected",
"static",
"interface",
"private",
"public",
];
/**
* Takes a Scheme identifier and encodes it to follow JS naming conventions.
*
* @param identifier An identifier name.
* @returns An encoded identifier that follows JS naming conventions.
*/
function encode(identifier) {
if (JS_KEYWORDS.includes(identifier) || identifier.startsWith("$scheme_")) {
return ("$scheme_" +
(0, js_base64_1.encode)(identifier).replace(/([^a-zA-Z0-9_])/g, (match) => `\$${match.charCodeAt(0)}\$`));
}
else {
return identifier.replace(/([^a-zA-Z0-9_])/g, (match) => `\$${match.charCodeAt(0)}\$`);
}
}
exports.encode = encode;
/**
* Takes a JS identifier and decodes it to follow Scheme naming conventions.
*
* @param identifier An encoded identifier name.
* @returns A decoded identifier that follows Scheme naming conventions.
*/
function decode(identifier) {
if (identifier.startsWith("$scheme_")) {
return (0, js_base64_1.decode)(identifier
.slice(8)
.replace(/\$([0-9]+)\$/g, (_, code) => String.fromCharCode(parseInt(code))));
}
else {
return identifier.replace(/\$([0-9]+)\$/g, (_, code) => String.fromCharCode(parseInt(code)));
}
}
exports.decode = decode;
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