Completely allow evaluating -0

1 files changed, 13 insertions, 7 deletions

diff --git a/lib/compress.js b/lib/compress.js
index e8c42c04..419c6a25 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -183,9 +183,18 @@ merge(Compressor.prototype, {
                 value: val
             }).optimize(compressor);
           case "number":
-            return make_node(isNaN(val) ? AST_NaN : AST_Number, orig, {
-                value: val
-            }).optimize(compressor);
+            if (isNaN(val)) {
+                return make_node(AST_NaN, orig);
+            }
+
+            if ((1 / val) < 0) {
+                return make_node(AST_UnaryPrefix, orig, {
+                    operator: "-",
+                    expression: make_node(AST_Number, null, { value: -val })
+                });
+            }
+
+            return make_node(AST_Number, orig, { value: val }).optimize(compressor);
           case "boolean":
             return make_node(val ? AST_True : AST_False, orig).optimize(compressor);
           case "undefined":
@@ -1028,10 +1037,7 @@ merge(Compressor.prototype, {
                 return typeof e;
               case "void": return void ev(e, compressor);
               case "~": return ~ev(e, compressor);
-              case "-":
-                e = -ev(e, compressor);
-                if (e === -0) throw def;
-                return e;
+              case "-": return -ev(e, compressor);
               case "+": return +ev(e, compressor);
             }
             throw def;