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