RbConfig

Module

Constants

LIMITS

A Hash with the bounds of numeric types available to the C compiler used to build Ruby. To access this constant, first run require 'rbconfig/sizeof'.

require 'rbconfig/sizeof'
RUBY_PLATFORM # => "x64-mingw-ucrt"
RbConfig::LIMITS.fetch_values('FIXNUM_MAX', 'LONG_MAX')
# => [1073741823, 2147483647]

SIZEOF

A Hash with the byte size of C types available to the compiler used to build Ruby. To access this constant, first run require 'rbconfig/sizeof'.

require 'rbconfig/sizeof'
RUBY_PLATFORM                                  # => "x64-mingw-ucrt"
RbConfig::SIZEOF.fetch_values('long', 'void*') # => [4, 8]