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mirror of https://github.com/frappe/frappe_docker.git synced 2025-01-29 01:58:35 +00:00
2017-07-31 15:51:51 +05:30

47 lines
1.4 KiB
JavaScript

"use strict";
function createRegExpLiteral(args, prettify, t) {
var evaluatedArgs = args.map(function (a) {
return a.evaluate();
});
if (!evaluatedArgs.every(function (a) {
return a.confident && typeof a.value === "string";
})) {
return;
}
var pattern = evaluatedArgs.length >= 1 && evaluatedArgs[0].value !== "" ? evaluatedArgs[0].value : "(?:)";
var flags = evaluatedArgs.length >= 2 ? evaluatedArgs[1].value : "";
pattern = new RegExp(pattern).source;
if (prettify) {
pattern = pattern.replace(/\n/g, "\\n").replace(/\u2028/g, "\\u2028").replace(/\u2029/g, "\\u2029").replace(/[\b]/g, "[\\b]").replace(/\v/g, "\\v").replace(/\f/g, "\\f").replace(/\r/g, "\\r");
}
return t.regExpLiteral(pattern, flags);
}
function maybeReplaceWithRegExpLiteral(path, t) {
if (!t.isIdentifier(path.node.callee, { name: "RegExp" })) {
return;
}
var regExpLiteral = createRegExpLiteral(path.get("arguments"), true, t);
if (regExpLiteral) {
path.replaceWith(regExpLiteral);
}
}
module.exports = function (_ref) {
var t = _ref.types;
return {
name: "transform-regexp-constructors",
visitor: {
NewExpression(path) {
maybeReplaceWithRegExpLiteral(path, t);
},
CallExpression(path) {
// equivalent to `new RegExp()` according to §21.2.3
maybeReplaceWithRegExpLiteral(path, t);
}
}
};
};