* rational.c (rb_flt_rationalize_with_prec): new public C function
  to rationalize a Float instance with a precision.

* rational.c (rb_flt_rationalize): new public C function to
 rationalize a Float instance.  A precision is calculated from
 the given float number.

* include/ruby/intern.h: Add rb_flt_rationalize_with_prec and
  rb_flt_rationalize.

* parse.y: implement number literal suffixes, 'r' and 'i'.
  [ruby-core:55096] [Feature #8430]

* bootstraptest/test_literal_suffix.rb: add tests for parser to scan
  number literals with the above tsuffixes.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42311 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* properties.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42312 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-08-02

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42313 b2dd03c8-39d4-4d8f-98ff-823fe69b080e