Tag the constructor arguments in new-anonymous-class calls as named arguments.

src/dfmt/ast_info.d

@@ -464,6 +464,12 @@ final class FormatVisitor : ASTVisitor
         newCall.accept(this);
     }
 
+    override void visit(const NewAnonClassExpression newAnonClassCall)
+    {
+        visit(newAnonClassCall.constructorArguments);
+        newAnonClassCall.accept(this);
+    }
+
     private void visit(const Arguments arguments)
     {
         // Check if call has any arguments.

tests/allman/issue0586.d.ref

@@ -31,4 +31,8 @@ void test()
 {
     return Struct(foo: field.foo, bar: field.bar, baz: field.baz);
     return new Class(foo: field.foo, bar: field.bar, baz: field.baz);
+    // anonymous class
+    return new class(foo: field.foo, bar: field.bar, baz: field.baz) Class
+    {
+    };
 }

tests/issue0586.d

@@ -39,4 +39,9 @@ void test() {
         foo: field.foo,
         bar: field.bar,
         baz: field.baz);
+    // anonymous class
+    return new class(
+        foo: field.foo,
+        bar: field.bar,
+        baz: field.baz) Class { };
 }

tests/knr/issue0586.d.ref

@@ -30,4 +30,7 @@ void test()
 {
     return Struct(foo: field.foo, bar: field.bar, baz: field.baz);
     return new Class(foo: field.foo, bar: field.bar, baz: field.baz);
+    // anonymous class
+    return new class(foo: field.foo, bar: field.bar, baz: field.baz) Class {
+    };
 }

tests/otbs/issue0586.d.ref

@@ -26,4 +26,7 @@ void main() {
 void test() {
     return Struct(foo: field.foo, bar: field.bar, baz: field.baz);
     return new Class(foo: field.foo, bar: field.bar, baz: field.baz);
+    // anonymous class
+    return new class(foo: field.foo, bar: field.bar, baz: field.baz) Class {
+    };
 }