Module: Pione::Lang::DataExprCompiler

Defined in:
lib/pione/lang/data-expr.rb

Overview

DataExpr::Compiler is a regexp compiler for data expression.

Constant Summary collapse

TABLE = 
{}

Class Method Summary collapse

Class Method Details

.compile(pattern) ⇒ Object

Compiles data name into regular expression.



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# File 'lib/pione/lang/data-expr.rb', line 19

def compile(pattern)
  s = "^#{Regexp.escape(pattern)}$"
  TABLE.keys.each {|key| s.gsub!(key, TABLE)}
  s.gsub!(/\\\[(!|\\\^)?(.*)\\\]/){"[#{'^' if $1}#{$2.gsub('\-','-')}]"}
  s.gsub!(/\\{(.*)\\}/){"(#{$1.split(',').join('|')})"}
  Regexp.new(s)
end

.define_matcher(matcher, replace) ⇒ Object

Define a string matcher.



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# File 'lib/pione/lang/data-expr.rb', line 8

def self.define_matcher(matcher, replace)
  TABLE[Regexp.escape(matcher)] = replace
end