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Contents
class Card
module Mod
# Tries to build the module with as little string evaluation as possible.
# The problem here is that in methods like `module_eval` the Module.nesting
# list gets lost so all references in mod files to constants in the
# Card::Set namespace don't work.
# The solution is to construct a binding with the right Module.nesting list.
class BindingMagic < LoadStrategy
def load_modules
each_file do |abs_path, const_parts|
sm = SetModule.new const_parts, abs_path
set_module = sm.to_const
set_module.extend Card::Set unless sm.helper_module?
set_module.module_eval do
def self.source_location
abs_path
end
end
# Since module_eval doesn't take a binding argument, we have to
# execute module_eval with eval.
eval "#{set_module}.module_eval ::File.read('#{abs_path}'), '#{abs_path}'",
module_path_binding(set_module)
end
end
# Get a binding with a Module.nesting list that contains the
# given module and all of its containing modules as described
# by its fully qualified name in inner-to-outer order.
def module_path_binding mod
if mod.name.to_s.empty?
raise ArgumentError,
"Can't determine path nesting for a module with a blank name"
end
m = nil
b = TOPLEVEL_BINDING
mod.name.split("::").each do |part|
m, b =
eval(
"[ #{part} , #{part}.module_eval('binding') ]",
b
)
end
raise "Module found at name path not same as specified module" unless m == mod
b
end
end
end
end
Version data entries
14 entries across 14 versions & 1 rubygems