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| /***********************************************************************
|
| A JavaScript tokenizer / parser / beautifier / compressor.
| https://github.com/mishoo/UglifyJS2
|
| -------------------------------- (C) ---------------------------------
|
| Author: Mihai Bazon
| <mihai.bazon@gmail.com>
| http://mihai.bazon.net/blog
|
| Distributed under the BSD license:
|
| Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
|
| Redistribution and use in source and binary forms, with or without
| modification, are permitted provided that the following conditions
| are met:
|
| * Redistributions of source code must retain the above
| copyright notice, this list of conditions and the following
| disclaimer.
|
| * Redistributions in binary form must reproduce the above
| copyright notice, this list of conditions and the following
| disclaimer in the documentation and/or other materials
| provided with the distribution.
|
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
| EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
| PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
| LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
| OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
| PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
| PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
| THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
| TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
| THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
| SUCH DAMAGE.
|
| ***********************************************************************/
|
| import { makePredicate } from "../utils/index.js";
|
| // Lists of native methods, useful for `unsafe` option which assumes they exist.
| // Note: Lots of methods and functions are missing here, in case they aren't pure
| // or not available in all JS environments.
|
| function make_nested_lookup(obj) {
| const out = new Map();
| for (var key of Object.keys(obj)) {
| out.set(key, makePredicate(obj[key]));
| }
|
| const does_have = (global_name, fname) => {
| const inner_map = out.get(global_name);
| return inner_map != null && inner_map.has(fname);
| };
| return does_have;
| }
|
| // Objects which are safe to access without throwing or causing a side effect.
| // Usually we'd check the `unsafe` option first but these are way too common for that
| export const pure_prop_access_globals = new Set([
| "Number",
| "String",
| "Array",
| "Object",
| "Function",
| "Promise",
| ]);
|
| const object_methods = [
| "constructor",
| "toString",
| "valueOf",
| ];
|
| export const is_pure_native_method = make_nested_lookup({
| Array: [
| "indexOf",
| "join",
| "lastIndexOf",
| "slice",
| ...object_methods,
| ],
| Boolean: object_methods,
| Function: object_methods,
| Number: [
| "toExponential",
| "toFixed",
| "toPrecision",
| ...object_methods,
| ],
| Object: object_methods,
| RegExp: [
| "test",
| ...object_methods,
| ],
| String: [
| "charAt",
| "charCodeAt",
| "concat",
| "indexOf",
| "italics",
| "lastIndexOf",
| "match",
| "replace",
| "search",
| "slice",
| "split",
| "substr",
| "substring",
| "toLowerCase",
| "toUpperCase",
| "trim",
| ...object_methods,
| ],
| });
|
| export const is_pure_native_fn = make_nested_lookup({
| Array: [
| "isArray",
| ],
| Math: [
| "abs",
| "acos",
| "asin",
| "atan",
| "ceil",
| "cos",
| "exp",
| "floor",
| "log",
| "round",
| "sin",
| "sqrt",
| "tan",
| "atan2",
| "pow",
| "max",
| "min",
| ],
| Number: [
| "isFinite",
| "isNaN",
| ],
| Object: [
| "create",
| "getOwnPropertyDescriptor",
| "getOwnPropertyNames",
| "getPrototypeOf",
| "isExtensible",
| "isFrozen",
| "isSealed",
| "keys",
| ],
| String: [
| "fromCharCode",
| ],
| });
|
| // Known numeric values which come with JS environments
| export const is_pure_native_value = make_nested_lookup({
| Math: [
| "E",
| "LN10",
| "LN2",
| "LOG2E",
| "LOG10E",
| "PI",
| "SQRT1_2",
| "SQRT2",
| ],
| Number: [
| "MAX_VALUE",
| "MIN_VALUE",
| "NaN",
| "NEGATIVE_INFINITY",
| "POSITIVE_INFINITY",
| ],
| });
|
|
