Fix unneeded parens around unary args in new expression.

2 files changed, 26 insertions, 1 deletions

diff --git a/lib/output.js b/lib/output.js
index 324f96ed..801f7516 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -533,7 +533,7 @@ function OutputStream(options) {
     PARENS([ AST_Unary, AST_Undefined ], function(output){
         var p = output.parent();
         return p instanceof AST_PropAccess && p.expression === this
-            || p instanceof AST_New;
+            || p instanceof AST_Call && p.expression === this;
     });
 
     PARENS(AST_Seq, function(output){
diff --git a/test/compress/new.js b/test/compress/new.js
index 78a1026e..bdf22b0c 100644
--- a/test/compress/new.js
+++ b/test/compress/new.js
@@ -50,3 +50,28 @@ new_with_many_parameters: {
     }
     expect_exact: 'new foo.bar("baz");new x(/123/,456);'
 }
+
+new_constructor_with_unary_arguments: {
+    input: {
+        new x();
+        new x(-1);
+        new x(-1, -2);
+        new x(void 1, +2, -3, ~4, !5, --a, ++b, c--, d++, typeof e, delete f);
+        new (-1);     // should parse despite being invalid at runtime.
+        new (-1)();   // should parse despite being invalid at runtime.
+        new (-1)(-2); // should parse despite being invalid at runtime.
+    }
+    expect_exact: "new x;new x(-1);new x(-1,-2);new x(void 1,+2,-3,~4,!5,--a,++b,c--,d++,typeof e,delete f);new(-1);new(-1);new(-1)(-2);"
+}
+
+call_with_unary_arguments: {
+    input: {
+        x();
+        x(-1);
+        x(-1, -2);
+        x(void 1, +2, -3, ~4, !5, --a, ++b, c--, d++, typeof e, delete f);
+        (-1)();   // should parse despite being invalid at runtime.
+        (-1)(-2); // should parse despite being invalid at runtime.
+    }
+    expect_exact: "x();x(-1);x(-1,-2);x(void 1,+2,-3,~4,!5,--a,++b,c--,d++,typeof e,delete f);(-1)();(-1)(-2);"
+}