From 3564b4f20dfd2ec06dd162ce5c22b1b3f2e03c7f Mon Sep 17 00:00:00 2001 From: "Alex Lam S.L" Date: Sat, 6 Jan 2018 21:04:47 +0800 Subject: compress `RegExp()` in `unsafe` (#2735) --- lib/compress.js | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'lib') diff --git a/lib/compress.js b/lib/compress.js index 0f15eb7e..28d6a1c4 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -3869,6 +3869,27 @@ merge(Compressor.prototype, { operator: "!" }).optimize(compressor); break; + case "RegExp": + var params = []; + if (all(self.args, function(arg) { + var value = arg.evaluate(compressor); + params.unshift(value); + return arg !== value; + })) { + try { + return best_of(compressor, self, make_node(AST_RegExp, self, { + value: RegExp.apply(RegExp, params), + })); + } catch (ex) { + compressor.warn("Error converting {expr} [{file}:{line},{col}]", { + expr: self.print_to_string(), + file: self.start.file, + line: self.start.line, + col: self.start.col + }); + } + } + break; } else if (exp instanceof AST_Dot) switch(exp.property) { case "toString": if (self.args.length == 0) return make_node(AST_Binary, self, { -- cgit v1.2.3