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* vm_eval.c, eval.c (rb_f_block_given_p): move definition of

Browse source 
"iterator?" and "block_given?" to make static.
* vm.c (vm_get_ruby_level_caller_cfp): make it static.
* eval_intern.h, vm_insnhelper.c: move decl. of
  vm_get_ruby_level_caller_cfp()
  from eval_intern.h to vm_insnhelper.c.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@21660 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
ko1 2009-01-19 03:03:09 +00:00
parent cf23d0f0f0
commit 9b520ddcec
6 changed files with 55 additions and 44 deletions
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41
vm_eval.c
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@ -1377,11 +1377,52 @@ rb_f_local_variables(void)
return ary;
}
/*
* call-seq:
* block_given? => true or false
* iterator? => true or false
*
* Returns <code>true</code> if <code>yield</code> would execute a
* block in the current context. The <code>iterator?</code> form
* is mildly deprecated.
*
* def try
* if block_given?
* yield
* else
* "no block"
* end
* end
* try #=> "no block"
* try { "hello" } #=> "hello"
* try do "hello" end #=> "hello"
*/
VALUE
rb_f_block_given_p(void)
{
rb_thread_t *th = GET_THREAD();
rb_control_frame_t *cfp = th->cfp;
cfp = vm_get_ruby_level_caller_cfp(th, RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp));
if (cfp != 0 &&
(cfp->lfp[0] & 0x02) == 0 &&
GC_GUARDED_PTR_REF(cfp->lfp[0])) {
return Qtrue;
}
else {
return Qfalse;
}
}
void
Init_vm_eval(void)
{
rb_define_global_function("eval", rb_f_eval, -1);
rb_define_global_function("local_variables", rb_f_local_variables, 0);
rb_define_global_function("iterator?", rb_f_block_given_p, 0);
rb_define_global_function("block_given?", rb_f_block_given_p, 0);
rb_define_global_function("catch", rb_f_catch, -1);
rb_define_global_function("throw", rb_f_throw, -1);