diff options
| -rw-r--r-- | lib/compress.js | 11 | ||||
| -rw-r--r-- | test/compress/conditionals.js | 29 |
2 files changed, 40 insertions, 0 deletions
diff --git a/lib/compress.js b/lib/compress.js index 8d1ef8ac..70bbb7fc 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -3565,8 +3565,19 @@ merge(Compressor.prototype, { alternative: self.consequent }); } + var condition = self.condition; var consequent = self.consequent; var alternative = self.alternative; + // x?x:y --> x||y + if (condition instanceof AST_SymbolRef + && consequent instanceof AST_SymbolRef + && condition.definition() === consequent.definition()) { + return make_node(AST_Binary, self, { + operator: "||", + left: condition, + right: alternative + }); + } // if (foo) exp = something; else exp = something_else; // | // v diff --git a/test/compress/conditionals.js b/test/compress/conditionals.js index c5639836..e7ea2bb2 100644 --- a/test/compress/conditionals.js +++ b/test/compress/conditionals.js @@ -933,3 +933,32 @@ issue_1645_2: { } expect_stdout: true } + +condition_symbol_matches_consequent: { + options = { + conditionals: true, + } + input: { + function foo(x, y) { + return x ? x : y; + } + function bar() { + return g ? g : h; + } + var g = 4; + var h = 5; + console.log(foo(3, null), foo(0, 7), foo(true, false), bar()); + } + expect: { + function foo(x, y) { + return x || y; + } + function bar() { + return g || h; + } + var g = 4; + var h = 5; + console.log(foo(3, null), foo(0, 7), foo(true, false), bar()); + } + expect_stdout: "3 7 true 4" +} |