Module: Expgen

Defined in:: lib/expgen.rb,
lib/expgen/nodes.rb,
lib/expgen/parser.rb,
lib/expgen/version.rb,
lib/expgen/transform.rb,
lib/expgen/randomizer.rb

Defined Under Namespace

Modules: Nodes, Parser, Randomizer Classes: ParseError, Transform

Constant Summary collapse

ASCII =

(32..126).map(&:chr)

LOWER =

("a".."z").to_a

UPPER =

("A".."Z").to_a

DIGIT =

(0..9).map(&:to_s)

ALPHA =

LOWER + UPPER

WORD =

ALPHA + DIGIT + ["_"]

NEGATIVE_WORD =

ASCII - WORD

NON_DIGIT =

ASCII - DIGIT

HEX_DIGIT =

("a".."f").to_a + ("A".."F").to_a + DIGIT

NON_HEX_DIGIT =

ASCII - HEX_DIGIT

SPACE =

[" "]

NON_SPACE =

ASCII.drop(1)

CONTROL_CHARS =

(0.chr..31.chr).to_a

PUNCT =

(33..47).map(&:chr) + (58..64).map(&:chr) + (91..96).map(&:chr) + (123..126).map(&:chr)

ESCAPE_CHARS =

{ "n" => "\n", "s" => "\s", "r" => "\r", "t" => "\t", "v" => "\v", "f" => "\f", "a" => "\a", "e" => "\e" }

NON_LITERALS =

"[]\^$.|?*+()".split("").map { |l| "\\" + l }.join

VERSION =

"0.1.1"

Class Method Summary collapse

Class Method Details

.cache ⇒ `Object`



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# File 'lib/expgen.rb', line 28

def self.cache
  @cache ||= {}
end

.clear_cache ⇒ `Object`



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# File 'lib/expgen.rb', line 32

def self.clear_cache
  @cache = nil
end

.gen(exp) ⇒ `Object`

# File 'lib/expgen.rb', line 36

def self.gen(exp)
  source = if exp.respond_to?(:source) then exp.source else exp.to_s end
  cache[source] ||= Transform.new.apply((Parser::Expression.new.parse(source)))
  Randomizer.randomize(cache[source])
rescue Parslet::ParseFailed => e
  raise Expgen::ParseError, e.message
end