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Contents
# = OpEsc
#
module OpEsc
OPERATORS = %w{ +@ -@ + - ** * / % ~ <=> << >> < > === == =~ <= >= | & ^ []= [] }
OPERATORS_REGEXP = Regexp.new( '(' << OPERATORS.collect{ |k| Regexp.escape(k) }.join('|') << ')' )
OPERATORS_ESC_TABLE = {
"+@" => "op_plus_self",
"-@" => "op_minus_self",
"+" => "op_plus",
"-" => "op_minus",
"**" => "op_pow",
"*" => "op_mul",
"/" => "op_div",
"%" => "op_mod",
"~" => "op_tilde",
"<=>" => "op_cmp",
"<<" => "op_lshift",
">>" => "op_rshift",
"<" => "op_lt",
">" => "op_gt",
"===" => "op_case_eq",
"==" => "op_equal",
"=~" => "op_apply",
"<=" => "op_lt_eq",
">=" => "op_gt_eq",
"|" => "op_or",
"&" => "op_and",
"^" => "op_xor",
"[]=" => "op_store",
"[]" => "op_fetch"
}
# Applies operator escape's according to OPERATORS_ESCAPE_TABLE.
#
# op_esc('-') #=> "op_minus"
#
# CREDIT: Trans
def self.escape(str)
str.gsub(OPERATORS_REGEXP){ OPERATORS_ESC_TABLE[$1] }
end
# NOTE: op_esc used to support the method require_esc.
#
# # Require a file with puncuation marks escaped.
# #
# # require_esc '[].rb'
# #
# # in actuality requires the file 'op_fetch.rb'.
#
# def require_esc( fpath )
# fdir, fname = File.split(fpath)
# ename = op_esc( fname )
# case ename[-1,1] ; when '!','=','?' then ename = ename[0...-1] ; end
# epath = File.join( fdir, ename )
# require( epath )
# end
end
Version data entries
10 entries across 10 versions & 1 rubygems