Adding reporter of issue #232852 to CC so he can confirm this bug.

Thanks.

#1:

.img-responsive(@display: block;) {
  display: @display;
}

#2:

  &.left {
    #gradient > .horizontal(@start-color: rgba(0,0,0,.5); @end-color: rgba(0,0,0,.0001));
  }

#3:

@media (min-width: @grid-float-breakpoint) {
  .navbar-right {
    .dropdown-menu {
      .pull-right > .dropdown-menu();
    }
  }
}

.progress-striped .progress-bar {
  #gradient > .striped(@progress-bar-bg);
  background-size: 40px 40px;
}

#4:

.modal {
  &.in .modal-dialog { .translate(0, 0)}
}

The Problem is the less namespace feature:



1:

#bundle {
  .button () {
    display: block;
    border: 1px solid black;
    background-color: grey;
    &:hover { background-color: white }
  }
}

#header a {
  color: orange;
  #bundle > .button; // <- SYNTAX ERROR
}




2:

.unlock(@value) { 
  .doSomething() { 
    declaration: @value;
  }
}

#namespace() { // <- SYNTAX ERROR
  .unlock(5); 
}

#use-namespace { 
  #namespace > .doSomething(); // <- SYNTAX ERROR
}



http://lesscss.org/#-namespaces

(In reply to Marek Fukala from comment #4)
> 
> #4:
> 
> .modal {
>   &.in .modal-dialog { .translate(0, 0)}
> }

Seems that Netbeans is a little bit stricter. This works:

.modal {
  &.in .modal-dialog { 
      .translate(0, 0);
  }
}

(In reply to Marek Fukala from comment #2)
> #1:
> 
> .img-responsive(@display: block;) {
>   display: @display;
> }

Same here, this works:

.img-responsive(@display: block) {
  display: @display;
}

Bug has Duplicate #236362
https://netbeans.org/bugzilla/show_bug.cgi?id=236362

The only unresolved issue from here is duplicate of 234639

*** This bug has been marked as a duplicate of bug 234639 ***

There are some other issues too:

&:extend(.clearfix all);
&.in .modal-dialog { .translate(0, 0) }
.striped(@color: rgba(255,255,255,.15); @angle: 45deg)
.col-@{class}-@{index}

&:extend(.clearfix all);
&.in .modal-dialog { .translate(0, 0) }
.striped(@color: rgba(255,255,255,.15); @angle: 45deg)

is fixed in dev build. 
Product Version: NetBeans IDE Dev (Build 20150416-ad691c0c9b6c)
Java: 1.8.0_40; Java HotSpot(TM) 64-Bit Server VM 25.40-b25
Runtime: Java(TM) SE Runtime Environment 1.8.0_40-b26

For this one .col-@{class}-@{index} I will create new report. 

I am trying to clean this collection bugs, and have for each issue separate bug report. Thank you for understanding.

Here is new bug for less interpolation. https://netbeans.org/bugzilla/show_bug.cgi?id=25191