* eval.c (rb_f_method_name, rb_f_callee_name): new functions.

  new global method `__method__' and `__callee__'.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@10240 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 51 insertions, 0 deletions

diff --git a/eval.c b/eval.c
index e3a240eda1..e8d4f7d14c 100644
--- a/eval.c
+++ b/eval.c
@@ -7691,6 +7691,54 @@ rb_exec_end_proc(void)
     ruby_safe_level = safe;
 }
 
+/*
+ *  call-seq:
+ *     __method__         => string
+ *  
+ *  Returns the name of the current method as a Symbol.
+ *  If called from inside of an aliased method it will return the original
+ *  nonaliased name.
+ *  If called outside of a method, it returns <code>nil</code>.
+ *  See also <code>\_\_callee__</code>.
+ *
+ */
+
+static VALUE
+rb_f_method_name(void)
+{
+    struct FRAME* prev = ruby_frame->prev;
+    if (prev && prev->this_func) {
+	return ID2SYM(prev->this_func);
+    }
+    else {
+	return Qnil;
+    }
+}
+
+/*
+ *  call-seq:
+ *     __callee__         => string
+ *  
+ *  Returns the name of the current method as Symbol.
+ *  If called from inside of an aliased method it will return the aliased
+ *  name.
+ *  If called outside of a method, it returns <code>nil</code>.
+ *  See also <code>\_\_method__</code>.
+ *
+ */
+
+static VALUE
+rb_f_callee_name(void)
+{
+    struct FRAME* prev = ruby_frame->prev;
+    if (prev && prev->callee) {
+	return ID2SYM(prev->callee);
+    }
+    else {
+	return Qnil;
+    }
+}
+
 void
 Init_eval(void)
 {
@@ -7745,6 +7793,9 @@ Init_eval(void)
     rb_define_global_function("global_variables", rb_f_global_variables, 0); /* in variable.c */
     rb_define_global_function("local_variables", rb_f_local_variables, 0);
 
+    rb_define_global_function("__method__", rb_f_method_name, 0);
+    rb_define_global_function("__callee__", rb_f_callee_name, 0);
+
     rb_define_method(rb_cBasicObject, "send", rb_f_send, -1);
     rb_define_method(rb_cBasicObject, "__send__", rb_f_send, -1);
     rb_define_method(rb_cBasicObject, "funcall", rb_f_funcall, -1);