Module: Sexpr

Extended by:
Grammar::Tagging
Includes:
Node
Defined in:
lib/sexpr.rb,
lib/sexpr/node.rb,
lib/sexpr/errors.rb,
lib/sexpr/parser.rb,
lib/sexpr/grammar.rb,
lib/sexpr/matcher.rb,
lib/sexpr/version.rb,
lib/sexpr/rewriter.rb,
lib/sexpr/processor.rb,
lib/sexpr/matcher/many.rb,
lib/sexpr/matcher/rule.rb,
lib/sexpr/parser/citrus.rb,
lib/sexpr/grammar/options.rb,
lib/sexpr/grammar/parsing.rb,
lib/sexpr/grammar/tagging.rb,
lib/sexpr/grammar/matching.rb,
lib/sexpr/matcher/sequence.rb,
lib/sexpr/matcher/terminal.rb,
lib/sexpr/processor/helper.rb,
lib/sexpr/matcher/reference.rb,
lib/sexpr/matcher/alternative.rb,
lib/sexpr/matcher/non_terminal.rb,
lib/sexpr/processor/null_helper.rb,
lib/sexpr/processor/sexpr_coercions.rb

Overview

A helper to manipulate sexp grammars

Defined Under Namespace

Modules: Grammar, Matcher, Node, Parser, Version Classes: Error, InvalidParseSourceError, NoParserError, Processor, Rewriter, UnexpectedSexprError, UnrecognizedParserError

Constant Summary collapse

YAML_OPTIONS = 
{ :permitted_classes => %w[Regexp], :aliases => true }
PathLike = 
lambda{|x|
  x.respond_to?(:to_path) or (x.is_a?(String) and File.exist?(x))
}
VERSION = 
Version.to_s

Constants included from Node

Node::EMPTY_TRACKING_MARKERS

Class Method Summary collapse

Methods included from Grammar::Tagging

default_tagging_module, looks_a_sexpr?, mod2rulename, rule2modname, sexpr, tagging_module_for, tagging_reference

Methods included from Node

#sexpr_body, #sexpr_copy, #sexpr_type, #tracking_markers, #tracking_markers=

Class Method Details

.load(input, options = {}) ⇒ Object 



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# File 'lib/sexpr.rb', line 22

def self.load(input, options = {})
  case input
  when PathLike then load_file   input, options
  when String   then load_string input, options
  when Hash     then load_hash   input, options
  else
    raise ArgumentError, "Invalid argument for Sexpr::Grammar: #{input}"
  end
end

.load_file(input, options = {}) ⇒ Object 



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

def self.load_file(input, options = {})
  path = input.to_path rescue input.to_s
  load_hash load_yaml(File.read(path)), options.merge(:path => input)
end

.load_hash(input, options = {}) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/sexpr.rb', line 41

def self.load_hash(input, options = {})
  raise ArgumentError, "Invalid grammar definition: #{input}" unless Hash===input
  Grammar.new input, options
end

.load_string(input, options = {}) ⇒ Object 



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# File 'lib/sexpr.rb', line 37

def self.load_string(input, options = {})
  load_hash load_yaml(input), options
end

.load_yaml(source) ⇒ Object 



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# File 'lib/sexpr.rb', line 46

def self.load_yaml(source)
  if YAML.name == 'Psych' && Psych::VERSION >= '3.1'
    YAML.safe_load(source, **YAML_OPTIONS)
  else
    YAML.load(source)
  end
end