method

binding

v2_1_10 - Show latest stable - 0 notes - Class: Proc

binding() public

Returns the binding associated with prc. Note that Kernel#eval accepts either a Proc or a Binding object as its second parameter.

def fred(param)
  proc {}
end

b = fred(99)
eval("param", b.binding)   #=> 99

Show source

static VALUE
proc_binding(VALUE self)
{
    rb_proc_t *proc;
    VALUE bindval;
    rb_binding_t *bind;

    GetProcPtr(self, proc);
    if (RB_TYPE_P((VALUE)proc->block.iseq, T_NODE)) {
        if (!IS_METHOD_PROC_NODE((NODE *)proc->block.iseq)) {
            rb_raise(rb_eArgError, "Can't create Binding from C level Proc");
        }
    }

    bindval = rb_binding_alloc(rb_cBinding);
    GetBindingPtr(bindval, bind);
    bind->env = proc->envval;
    bind->blockprocval = proc->blockprocval;
    if (RUBY_VM_NORMAL_ISEQ_P(proc->block.iseq)) {
        bind->path = proc->block.iseq->location.path;
        bind->first_lineno = FIX2INT(rb_iseq_first_lineno(proc->block.iseq->self));
    }
    else {
        bind->path = Qnil;
        bind->first_lineno = 0;
    }
    return bindval;
}

binding

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