* prec.c (prec_prec_f): documentation patch from

  <gerardo.santana at gmail.com>.  [ruby-core:07689]

* bignum.c (rb_big_pow): second operand may be too big even if
  it's a Fixnum.  [ruby-talk:187984]

* README.EXT: update symbol description.  [ruby-talk:188104]

* COPYING: explicitly note GPLv2.  [ruby-talk:187922]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@10088 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 18 insertions, 5 deletions

diff --git a/README.EXT b/README.EXT
index 4cfe80bd82..e5d39911ca 100644
--- a/README.EXT
+++ b/README.EXT
@@ -330,17 +330,30 @@ of the innermost method (which is defined by Ruby) can be accessed.
 
 2.2.2 ID or Symbol
 
-You can invoke methods directly, without parsing the string.  First I
-need to explain about symbols (whose data type is ID).  ID is the
-integer number to represent Ruby's identifiers such as variable names.
-It can be accessed from Ruby in the form:
+You can invoke methods directly, without parsing the string.  First I need
+to explain about ID.  ID is the integer number to represent Ruby's
+identifiers such as variable names.  The Ruby data type corresponding to ID
+is Symbol.  It can be accessed from Ruby in the form:
 
  :Identifier
 
-You can get the symbol value from a string within C code by using
+You can get the ID value from a string within C code by using
 
   rb_intern(const char *name)
 
+You can retrieve ID from Ruby object (Symbol or String) given as an
+argument by using
+
+  rb_to_id(VALUE symbol)
+
+You can convert C ID to Ruby Symbol by using
+
+  VALUE ID2SYM(ID id)
+
+and to convert Ruby Symbol object to ID, use
+
+  ID SYM2ID(VALUE symbol)
+
 2.2.3 Invoke Ruby method from C
 
 To invoke methods directly, you can use the function below