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Contents
# encoding: utf-8
module Antelope
module Ace
class Grammar
# Handles loading to and from files and strings.
module Loading
# Defines class methods on the grammar.
module ClassMethods
# Loads a grammar from a file. Assumes the output
# directory and name from the file name.
#
# @param file_name [String] the file name.
# @return [Grammar]
# @see #from_string
def from_file(file_name)
body = File.read(file_name)
output = File.dirname(file_name)
name = File.basename(file_name).gsub(/\.[A-Za-z]+/, "")
from_string(name, output, body)
end
# Loads a grammar from a string. First runs the scanner and
# compiler over the string, and then instantiates a new
# Grammar from the resultant.
#
# @param name [String] the name of the grammar.
# @param output [String] the output directory.
# @param string [String] the grammar body.
# @return [Grammar]
# @see Ace::Scanner
# @see Ace::Compiler
def from_string(name, output, string)
scanner = Ace::Scanner.scan(string, name)
compiler = Ace::Compiler.compile(scanner)
new(name, output, compiler)
end
end
# Extends the grammar with the class methods.
#
# @param receiver [Grammar]
# @see ClassMethods
def self.included(receiver)
receiver.extend ClassMethods
end
end
end
end
end
Version data entries
5 entries across 5 versions & 1 rubygems