--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: "Establishes <em>proc</em> as the handler for tracing, or disables tracing if the parameter is <tt>nil</tt>. <em>proc</em> takes up to six parameters: an event name, a filename, a line number, an object id, a binding, and the name of a class. <em>proc</em> is invoked whenever an event occurs. Events are: <tt>c-call</tt> (call a C-language routine), <tt>c-return</tt> (return from a C-language routine), <tt>call</tt> (call a Ruby method), <tt>class</tt> (start a class or module definition), <tt>end</tt> (finish a class or module definition), <tt>line</tt> (execute code on a new line), <tt>raise</tt> (raise an exception), and <tt>return</tt> (return from a Ruby method). Tracing is disabled within the context of <em>proc</em>."
- !ruby/struct:SM::Flow::VERB 
  body: "    class Test\n    def test\n      a = 1\n      b = 2\n    end\n    end\n\n    set_trace_func proc { |event, file, line, id, binding, classname|\n       printf &quot;%8s %s:%-2d %10s %8s\\n&quot;, event, file, line, id, classname\n    }\n    t = Test.new\n    t.test\n\n      line prog.rb:11               false\n    c-call prog.rb:11        new    Class\n    c-call prog.rb:11 initialize   Object\n  c-return prog.rb:11 initialize   Object\n  c-return prog.rb:11        new    Class\n      line prog.rb:12               false\n      call prog.rb:2        test     Test\n      line prog.rb:3        test     Test\n      line prog.rb:4        test     Test\n    return prog.rb:4        test     Test\n"
full_name: Kernel#set_trace_func
is_singleton: false
name: set_trace_func
params: |
  set_trace_func(proc)    => proc
  set_trace_func(nil)     => nil

visibility: public