--- !ditz.rubyforge.org,2008-03-06/issue 
title: add a directive to prevent tail calls to a function
desc: |-
  Some functions are sensitive to tail calls, and it would be useful to
  reject tail calls for them.  For instance, any function using Duktape.act()
  to introspect the call stack is potentially affected by being called
  through a tail call.
  
  Add a directive to refuse tailcalls for an Ecmascript function, e.g.::
  
    function foo() {
      'use duk notailcall';
    }
  
  Or perhaps shorter::
  
    function foo() {
      'use duk notail';
    }
  
  Current practice seems to be to prefix directives with "use ", without
  that convention one could use::
  
    function foo() {
      'duk notail';
    }
  
  Other than the "use " prefix (used also by asm.js) there doesn't seem to
  be a best practice for custom directive naming.  For instance:
  
    http://wiki.ecmascript.org/doku.php?id=harmony:pragmas
  
  indicates this as an open issue for Harmony pragmas and suggests something
  like "use moz widgets".
type: :task
component: duk
release: v0.11
reporter: Sami Vaarala <sami.vaarala@iki.fi>
status: :closed
disposition: :fixed
creation_time: 2014-06-09 08:56:48.057459 Z
references: []

id: 814f4d860f890951f528005abc2039a37fe59d1c
log_events: 
- - 2014-06-09 08:56:48.521379 Z
  - Sami Vaarala <sami.vaarala@iki.fi>
  - created
  - ""
- - 2014-06-09 10:13:52.240206 Z
  - Sami Vaarala <sami.vaarala@iki.fi>
  - closed with disposition fixed
  - ""