Class: Astel::NodePattern

Inherits:
Object
  • Object
show all
Defined in:
lib/astel/node_pattern.rb,
lib/astel/node_pattern.rb,
lib/astel/node_pattern/lexer.rb,
lib/astel/node_pattern/parser.rb,
lib/astel/node_pattern/matcher_compiler.rb,
lib/astel/node_pattern/predicate_compiler.rb

Defined Under Namespace

Modules: CaptureMatching Classes: Lexer, MatcherCompiler, Parser, PatternError, PredicateCompiler, Token

Constant Summary collapse

COMPILER_CACHE_LIMIT = 
128

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(predicate, matcher) ⇒ NodePattern

Returns a new instance of NodePattern.



63
64
65
66
67
68
69
70
 
# File 'lib/astel/node_pattern.rb', line 63

def initialize(predicate, matcher)
  define_singleton_method(:match?, predicate)
  return unless matcher

  define_singleton_method(:match_captures, matcher)
  singleton_class.send(:private, :match_captures)
  extend CaptureMatching
end

Class Method Details

.compile(source) ⇒ Object 



43
44
45
46
 
# File 'lib/astel/node_pattern.rb', line 43

def self.compile(source)
  predicate, matcher = compiled_matchers(source)
  new(predicate, matcher)
end

Instance Method Details

#match(node) {|captures| ... } ⇒ Object

Yields:

  • (captures) 


72
73
74
75
76
77
78
 
# File 'lib/astel/node_pattern.rb', line 72

def match(node)
  return unless match?(node)

  captures = []
  yield captures if block_given?
  captures
end