Module: Calyx::Format

Defined in:
lib/calyx/format.rb

Overview

Helper methods for loading and initializing grammars from static files on disk.

Class Method Summary collapse

Class Method Details

.load(filename) ⇒ Calyx::Grammar

Reads a file and parses its format, based on the given extension.

Accepts a JSON or YAML file path, identified by its extension (‘.json` or `.yml`).

Parameters:

  • filename (String)

Returns:



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# File 'lib/calyx/format.rb', line 12

def self.load(filename)
  file = File.read(filename)
  extension = File.extname(filename)
  if extension == ".yml"
    self.load_yml(file)
  elsif extension == ".json"
    self.load_json(file)
  else
    raise Errors::UnsupportedFormat.new(filename)
  end
end

.load_json(data) ⇒ Calyx::Grammar

Converts the given string of JSON data to a grammar instance.

Parameters:

  • data (String)

Returns:



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# File 'lib/calyx/format.rb', line 37

def self.load_json(data)
  require 'json'
  self.build_grammar(JSON.parse(data))
end

.load_yml(data) ⇒ Calyx::Grammar

Converts the given string of YAML data to a grammar instance.

Parameters:

  • data (String)

Returns:



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# File 'lib/calyx/format.rb', line 28

def self.load_yml(data)
  require 'yaml'
  self.build_grammar(YAML.load(data))
end