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code.js
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Mon, Feb 10, 09:44

code.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.regexpCode = exports.getEsmExportName = exports.getProperty = exports.safeStringify = exports.stringify = exports.strConcat = exports.addCodeArg = exports.str = exports._ = exports.nil = exports._Code = exports.Name = exports.IDENTIFIER = exports._CodeOrName = void 0;
class _CodeOrName {
}
exports._CodeOrName = _CodeOrName;
exports.IDENTIFIER = /^[a-z$_][a-z$_0-9]*$/i;
class Name extends _CodeOrName {
constructor(s) {
super();
if (!exports.IDENTIFIER.test(s))
throw new Error("CodeGen: name must be a valid identifier");
this.str = s;
}
toString() {
return this.str;
}
emptyStr() {
return false;
}
get names() {
return { [this.str]: 1 };
}
}
exports.Name = Name;
class _Code extends _CodeOrName {
constructor(code) {
super();
this._items = typeof code === "string" ? [code] : code;
}
toString() {
return this.str;
}
emptyStr() {
if (this._items.length > 1)
return false;
const item = this._items[0];
return item === "" || item === '""';
}
get str() {
var _a;
return ((_a = this._str) !== null && _a !== void 0 ? _a : (this._str = this._items.reduce((s, c) => `${s}${c}`, "")));
}
get names() {
var _a;
return ((_a = this._names) !== null && _a !== void 0 ? _a : (this._names = this._items.reduce((names, c) => {
if (c instanceof Name)
names[c.str] = (names[c.str] || 0) + 1;
return names;
}, {})));
}
}
exports._Code = _Code;
exports.nil = new _Code("");
function _(strs, ...args) {
const code = [strs[0]];
let i = 0;
while (i < args.length) {
addCodeArg(code, args[i]);
code.push(strs[++i]);
}
return new _Code(code);
}
exports._ = _;
const plus = new _Code("+");
function str(strs, ...args) {
const expr = [safeStringify(strs[0])];
let i = 0;
while (i < args.length) {
expr.push(plus);
addCodeArg(expr, args[i]);
expr.push(plus, safeStringify(strs[++i]));
}
optimize(expr);
return new _Code(expr);
}
exports.str = str;
function addCodeArg(code, arg) {
if (arg instanceof _Code)
code.push(...arg._items);
else if (arg instanceof Name)
code.push(arg);
else
code.push(interpolate(arg));
}
exports.addCodeArg = addCodeArg;
function optimize(expr) {
let i = 1;
while (i < expr.length - 1) {
if (expr[i] === plus) {
const res = mergeExprItems(expr[i - 1], expr[i + 1]);
if (res !== undefined) {
expr.splice(i - 1, 3, res);
continue;
}
expr[i++] = "+";
}
i++;
}
}
function mergeExprItems(a, b) {
if (b === '""')
return a;
if (a === '""')
return b;
if (typeof a == "string") {
if (b instanceof Name || a[a.length - 1] !== '"')
return;
if (typeof b != "string")
return `${a.slice(0, -1)}${b}"`;
if (b[0] === '"')
return a.slice(0, -1) + b.slice(1);
return;
}
if (typeof b == "string" && b[0] === '"' && !(a instanceof Name))
return `"${a}${b.slice(1)}`;
return;
}
function strConcat(c1, c2) {
return c2.emptyStr() ? c1 : c1.emptyStr() ? c2 : str `${c1}${c2}`;
}
exports.strConcat = strConcat;
// TODO do not allow arrays here
function interpolate(x) {
return typeof x == "number" || typeof x == "boolean" || x === null
? x
: safeStringify(Array.isArray(x) ? x.join(",") : x);
}
function stringify(x) {
return new _Code(safeStringify(x));
}
exports.stringify = stringify;
function safeStringify(x) {
return JSON.stringify(x)
.replace(/\u2028/g, "\\u2028")
.replace(/\u2029/g, "\\u2029");
}
exports.safeStringify = safeStringify;
function getProperty(key) {
return typeof key == "string" && exports.IDENTIFIER.test(key) ? new _Code(`.${key}`) : _ `[${key}]`;
}
exports.getProperty = getProperty;
//Does best effort to format the name properly
function getEsmExportName(key) {
if (typeof key == "string" && exports.IDENTIFIER.test(key)) {
return new _Code(`${key}`);
}
throw new Error(`CodeGen: invalid export name: ${key}, use explicit $id name mapping`);
}
exports.getEsmExportName = getEsmExportName;
function regexpCode(rx) {
return new _Code(rx.toString());
}
exports.regexpCode = regexpCode;
//# sourceMappingURL=code.js.map

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