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Contents
module Pione
module Util
# Positionable provides the function that stores its source position
# information to objects.
module Positionable
# Set source position informations of the object.
#
# @example Specify package name, filename, line number, and column number
# obj = Object.new.tap {|x| x.extend Positionable}
# obj.set_source_position("HelloWorld", "HelloWorld.pione", 1, 1)
#
# @example SourcePosition object
# obj = Object.new.tap {|x| x.extend Positionable}
# obj.set_source_position(other.pos)
def set_source_position(*args)
if args.size == 1 and args[0].is_a?(SourcePosition)
@__source_position__ = args[0]
elsif args.size > 0
@__source_position__ = SourcePosition.new(*args)
end
end
# Return the source position.
def pos
@__source_position__ || SourcePosition.unknown
end
# Return the line and column. If source position isn't established, return
# nil simply.
def line_and_column
if @__source_position__
return @__source_position__.line, @__source_position__.column
end
end
end
# SourcePosition represents source position model of PIONE and defines its
# string format.
class SourcePosition < StructX
class << self
def unknown
@unknown ||= UnknownSourcePosition.new
end
end
member :package_name
member :filename
member :line
member :column
def format
args = [package_name, filename, line, column]
"(package %s, file %s, line %s, column %s)" % args
end
end
class UnknownSourcePosition < StructX
member :dummy
def format
""
end
end
end
end
Version data entries
9 entries across 9 versions & 1 rubygems